This document provides instructions for correctly setting up a compound bow. It discusses setting the string length and brace height, adjusting the bow weight and tiller, positioning the arrow rest at the balanced limb center, setting the nocking point, installing a peep sight, and adjusting the cable guard and draw length. The setup process is described step-by-step to allow an archer to properly configure their new compound bow for maximum accuracy and performance.
Thank you for your purchase of a Parker bow. Each Parker bow is designed, engineered and
manufactured by hunters like you.
Attention to detail and pride in our products drive each of us at Parker to make the best hunting equipment on the market
For more information on the current product line of Parker Crossbows and Parker Compound Bows, or to see a color
version of this owners manual visit our website at
http://hunthacks.com/
Optimizationof fuselage shape for better pressurization and drag reductioneSAT Journals
Abstract
The fuselage of any aircraft is essentially to accommodate the payload. It is normally not as streamlined as the wing. Cabin pressurization has been a major concern in the manufacturing of aircrafts. Generally, a cylindrical shape is preferred from a pressurization point of view as it has a higher strength and weighs less too. On the other hand, a sphere is considered as the best pressure vessel among all the shapes, but, sphere being a bluff body is not suitable for carrying payloads. On this note, a cylinder is considered to be better than a sphere to carry the payload and mainly to achieve a streamlined flow. In this paper, the shape chosen is a combination of the sphere and the cylinder to achieve optimum results for pressurization as well as a better streamlined flow. Our prime aim is to convert this bluff body into something more efficient and useful, rather than only for carrying the payload. We have focused basically on two details viz. 1) Better Pressurization and 2) to assist in minimizing the drag, thereby increasing the overall lift of the aircraft and hence increasing the fuel efficiency. The proposed fuselage structure was designed in CATIA V5 software and structural analyses were done in Auto-Desk Multi-Physics software. As a result, a better structural load capacity was found. A load of 10 N/mm2 was applied on both the bodies under consideration (cylinder and ellipse) having the same material, surface area, volume and weight. For the proposed elliptical design, 78% reduction in the minimum stress value and 10% reduction in the maximum stress value were noticed.
Keywords: Fuselage, Lifting Fuselage, Drag Reduction, Pressurization, Hoop Stress, Multi body design, Toroidal Shells, Multi-cylinder, Channel Propeller Configuration, Carbon Fiber, Graphite Fiber, Stabilization and Carbonization.
ABSTRACT: The roll cage is used as a structural base for all terrain vehicles and it also protects the occupant in case of impact and roll-over accidents so determining the strength and impact withstanding capacity of the roll Cage plays important role for the design and it is also a supporting structure for the engine. Most of the forces are taken up by the roll cage.This paper aims at Finite Element analysis of roll cage. Stress analysis carried out using Ansys workbench and it includes torsional analysis .modal analysis for the maximum operating speed of the vehicle.
Thank you for your purchase of a Parker bow. Each Parker bow is designed, engineered and
manufactured by hunters like you.
Attention to detail and pride in our products drive each of us at Parker to make the best hunting equipment on the market
For more information on the current product line of Parker Crossbows and Parker Compound Bows, or to see a color
version of this owners manual visit our website at
http://hunthacks.com/
Optimizationof fuselage shape for better pressurization and drag reductioneSAT Journals
Abstract
The fuselage of any aircraft is essentially to accommodate the payload. It is normally not as streamlined as the wing. Cabin pressurization has been a major concern in the manufacturing of aircrafts. Generally, a cylindrical shape is preferred from a pressurization point of view as it has a higher strength and weighs less too. On the other hand, a sphere is considered as the best pressure vessel among all the shapes, but, sphere being a bluff body is not suitable for carrying payloads. On this note, a cylinder is considered to be better than a sphere to carry the payload and mainly to achieve a streamlined flow. In this paper, the shape chosen is a combination of the sphere and the cylinder to achieve optimum results for pressurization as well as a better streamlined flow. Our prime aim is to convert this bluff body into something more efficient and useful, rather than only for carrying the payload. We have focused basically on two details viz. 1) Better Pressurization and 2) to assist in minimizing the drag, thereby increasing the overall lift of the aircraft and hence increasing the fuel efficiency. The proposed fuselage structure was designed in CATIA V5 software and structural analyses were done in Auto-Desk Multi-Physics software. As a result, a better structural load capacity was found. A load of 10 N/mm2 was applied on both the bodies under consideration (cylinder and ellipse) having the same material, surface area, volume and weight. For the proposed elliptical design, 78% reduction in the minimum stress value and 10% reduction in the maximum stress value were noticed.
Keywords: Fuselage, Lifting Fuselage, Drag Reduction, Pressurization, Hoop Stress, Multi body design, Toroidal Shells, Multi-cylinder, Channel Propeller Configuration, Carbon Fiber, Graphite Fiber, Stabilization and Carbonization.
ABSTRACT: The roll cage is used as a structural base for all terrain vehicles and it also protects the occupant in case of impact and roll-over accidents so determining the strength and impact withstanding capacity of the roll Cage plays important role for the design and it is also a supporting structure for the engine. Most of the forces are taken up by the roll cage.This paper aims at Finite Element analysis of roll cage. Stress analysis carried out using Ansys workbench and it includes torsional analysis .modal analysis for the maximum operating speed of the vehicle.
DESIGN AND ANALYSIS OF LEAF SPRING BY USING COMPOSITE MATERIAL FOR LIGHT VEHI...IAEME Publication
Reducing weight while increasing or maintaining strength of products is getting to be highly important research issue in this modern world. Composite materials are one of the material families which are attracting researchers and being solutions of such issue. In this paper we describe design and analysis of composite leaf spring. For this purpose, a rear leaf spring for MAHINDRA “MODEL-COMMANDER 650 DI” is considered.
Experimental and numerical stress analysis of a rectangular wing structureLahiru Dilshan
Structures of an aircraft can be categorised as primary structural components and secondary structure components. Primary structure components are the components which lead to failure of the aircraft if such component is failed during the flight cycle. Secondary components are load sharing components in an aircraft but will not pave the way to catastrophic failure.
Designing aircraft structures should follow several strategies to assure safety. For that, there are three main methods used in designing and maintenance procedures. First one is the safe flight, which an aircraft component has a lifetime. That component is not used beyond that limit and should replace though it is not failed. The fail-safe method is another one that redundant systems or components are there to ensure there is another way to carry the load or do necessary control. The final one is the damage tolerance which measures the current damages are within acceptable limit and carry out the main functions until the next main maintenance process.
To determine the safety of a structure component load distribution, stress and strain variation, deflection can be used as parameters to make sure that component can withstand maximum allowable load with safety factor. There are several techniques used to get accurate results as numerical methods, Finite Element Method (FEM) and experimental methods. In the design process, those three steps are followed in an orderly manner to ensure the safety of an aircraft.
In this document of Theory of Flight
we are discussing some topics in detail which are:
Intereference drag
Induced drag
Factors that Affects Induced Drag:
Stabilator
All these topics are discussed in detail hope you like it................
Appunti del corso di dottorato: Ottimizzazione Strutturale / Structural Optim...Franco Bontempi
Appunti del corso di dottorato:
INTRODUZIONE ALL'OTTIMIZZAZIONE STRUTTURALE
Ia parte
Lezione del 13 maggio 2014
Lecture of the Ph.D. Course on STRUCTURAL OPTIMIZATION
May, 13. 2014
DESIGN AND ANALYSIS OF CONNECTING ROD USING ALUMINIUM ALLOY 7068 T6, T6511 IAEME Publication
The connecting rod is the intermediate member between the piston and the Crankshaft. Its primary function is to transmit the push and pull from the piston pin to the crank pin, thus converting the reciprocating motion of the piston into rotary motion of the crank. This thesis describes designing
and Analysis of connecting rod. Currently existing connecting rod is manufactured by using Forged steel. In this drawing is drafted from the calculations.
Posture e sport. La prevenzione dei traumi da carico iterativo
Vincenzo Canali
Posture e Sport – La forza e la flessibilità nei rapporti di flesso-estensione si pone l’obiettivo di applicare allo sport di qualsiasi livello ed alla vita di relazione, un sistema tridimensionale preventivo dei traumi da carico iterativo e l’ottimizzazione dei gesti tecnici come applicabilità della forza in un range motion che permetta alla fase dinamica di ogni gesto, di essere efficace senza produrre pericolose compensazioni sulle strutture più deboli.
http://www.calzetti-mariucci.it/shop/prodotti/posture-e-sport-la-prevenzione-dei-traumi-da-carico-iterativo
Design, Development & Analysis of Loopwheel TechnologyABHISHEKPUND
In today’s world, Bicycles are the most favorite choice when it comes to causes like health, pollution, and the environment. Researches have been done in order to make the ride comfortable. This undertaking report introduces the Loop wheel. The purpose of our project was to reduce shocks on uneven roads, improve shock Absorption & take a smooth ride. Loop Wheel is a suspension system, Built to Experience a smooth ride on uneven roads by reducing shocks! So we replaced Spokes by 3 carbon springs. If we are riding on uneven roads, the spring can move in between Hub and Rim. As it's gone past a bump or bad road then the spring which is been touched to the surface will get compressed and others get to expand! So the whole impact power gets distribute in the wheel and the rider will feel nothing about that impact.
Structural detailing of fuselage of aeroplane /aircraft.PriyankaKg4
This presentation is about the structural detailing of fuselage of aeroplane .The fuselage or body of the airplane, holds all the pieces together. The pilots sit in the cockpit at the front of the fuselage. Passengers and cargo are carried in the rear of the fuselage. Some aircraft carry fuel in the fuselage; others carry the fuel in the wings.
Stress and fatigue analysis of landing gear axle of a trainer aircrafteSAT Journals
Abstract The undercarriage or landing gear of an aircraft is the structure that supports an aircraft on the ground and allows it to taxi, takeoff and land. Among the various parts of landing gear, axle is the most critical component where the loads (landing and ground loads) act on the axle first, then transferred to the structure. In this study stress and fatigue analysis of the axle is performed to meet the strength and life requirements. The modeling of the axle is done using UniGraphics (UG) software. Stress analysis is carried out using MSC Patran (pre-processing and post-processing)/Nastran (solver) for different landing loads (spin up, spring back, maximum vertical and drift) and ground handling loads (braking, taxing and turning). Stress analysis was carried out by both classical and FEM approaches and by comparing the results it was obvious that they were in correlation with one another. Fatigue analysis was also carried out for the axle using landing spectrum and ground handling spectrum to estimate the fatigue life. By the iteration process, the requirement of 10000 landings was satisfied. Keywords: Static, Fatigue, Axle, Fatigue life, UniGraphics, MSC Patran, MSC Nastran
DESIGN AND ANALYSIS OF LEAF SPRING BY USING COMPOSITE MATERIAL FOR LIGHT VEHI...IAEME Publication
Reducing weight while increasing or maintaining strength of products is getting to be highly important research issue in this modern world. Composite materials are one of the material families which are attracting researchers and being solutions of such issue. In this paper we describe design and analysis of composite leaf spring. For this purpose, a rear leaf spring for MAHINDRA “MODEL-COMMANDER 650 DI” is considered.
Experimental and numerical stress analysis of a rectangular wing structureLahiru Dilshan
Structures of an aircraft can be categorised as primary structural components and secondary structure components. Primary structure components are the components which lead to failure of the aircraft if such component is failed during the flight cycle. Secondary components are load sharing components in an aircraft but will not pave the way to catastrophic failure.
Designing aircraft structures should follow several strategies to assure safety. For that, there are three main methods used in designing and maintenance procedures. First one is the safe flight, which an aircraft component has a lifetime. That component is not used beyond that limit and should replace though it is not failed. The fail-safe method is another one that redundant systems or components are there to ensure there is another way to carry the load or do necessary control. The final one is the damage tolerance which measures the current damages are within acceptable limit and carry out the main functions until the next main maintenance process.
To determine the safety of a structure component load distribution, stress and strain variation, deflection can be used as parameters to make sure that component can withstand maximum allowable load with safety factor. There are several techniques used to get accurate results as numerical methods, Finite Element Method (FEM) and experimental methods. In the design process, those three steps are followed in an orderly manner to ensure the safety of an aircraft.
In this document of Theory of Flight
we are discussing some topics in detail which are:
Intereference drag
Induced drag
Factors that Affects Induced Drag:
Stabilator
All these topics are discussed in detail hope you like it................
Appunti del corso di dottorato: Ottimizzazione Strutturale / Structural Optim...Franco Bontempi
Appunti del corso di dottorato:
INTRODUZIONE ALL'OTTIMIZZAZIONE STRUTTURALE
Ia parte
Lezione del 13 maggio 2014
Lecture of the Ph.D. Course on STRUCTURAL OPTIMIZATION
May, 13. 2014
DESIGN AND ANALYSIS OF CONNECTING ROD USING ALUMINIUM ALLOY 7068 T6, T6511 IAEME Publication
The connecting rod is the intermediate member between the piston and the Crankshaft. Its primary function is to transmit the push and pull from the piston pin to the crank pin, thus converting the reciprocating motion of the piston into rotary motion of the crank. This thesis describes designing
and Analysis of connecting rod. Currently existing connecting rod is manufactured by using Forged steel. In this drawing is drafted from the calculations.
Posture e sport. La prevenzione dei traumi da carico iterativo
Vincenzo Canali
Posture e Sport – La forza e la flessibilità nei rapporti di flesso-estensione si pone l’obiettivo di applicare allo sport di qualsiasi livello ed alla vita di relazione, un sistema tridimensionale preventivo dei traumi da carico iterativo e l’ottimizzazione dei gesti tecnici come applicabilità della forza in un range motion che permetta alla fase dinamica di ogni gesto, di essere efficace senza produrre pericolose compensazioni sulle strutture più deboli.
http://www.calzetti-mariucci.it/shop/prodotti/posture-e-sport-la-prevenzione-dei-traumi-da-carico-iterativo
Design, Development & Analysis of Loopwheel TechnologyABHISHEKPUND
In today’s world, Bicycles are the most favorite choice when it comes to causes like health, pollution, and the environment. Researches have been done in order to make the ride comfortable. This undertaking report introduces the Loop wheel. The purpose of our project was to reduce shocks on uneven roads, improve shock Absorption & take a smooth ride. Loop Wheel is a suspension system, Built to Experience a smooth ride on uneven roads by reducing shocks! So we replaced Spokes by 3 carbon springs. If we are riding on uneven roads, the spring can move in between Hub and Rim. As it's gone past a bump or bad road then the spring which is been touched to the surface will get compressed and others get to expand! So the whole impact power gets distribute in the wheel and the rider will feel nothing about that impact.
Structural detailing of fuselage of aeroplane /aircraft.PriyankaKg4
This presentation is about the structural detailing of fuselage of aeroplane .The fuselage or body of the airplane, holds all the pieces together. The pilots sit in the cockpit at the front of the fuselage. Passengers and cargo are carried in the rear of the fuselage. Some aircraft carry fuel in the fuselage; others carry the fuel in the wings.
Stress and fatigue analysis of landing gear axle of a trainer aircrafteSAT Journals
Abstract The undercarriage or landing gear of an aircraft is the structure that supports an aircraft on the ground and allows it to taxi, takeoff and land. Among the various parts of landing gear, axle is the most critical component where the loads (landing and ground loads) act on the axle first, then transferred to the structure. In this study stress and fatigue analysis of the axle is performed to meet the strength and life requirements. The modeling of the axle is done using UniGraphics (UG) software. Stress analysis is carried out using MSC Patran (pre-processing and post-processing)/Nastran (solver) for different landing loads (spin up, spring back, maximum vertical and drift) and ground handling loads (braking, taxing and turning). Stress analysis was carried out by both classical and FEM approaches and by comparing the results it was obvious that they were in correlation with one another. Fatigue analysis was also carried out for the axle using landing spectrum and ground handling spectrum to estimate the fatigue life. By the iteration process, the requirement of 10000 landings was satisfied. Keywords: Static, Fatigue, Axle, Fatigue life, UniGraphics, MSC Patran, MSC Nastran
Akshay Ram on Adobe's Creative Strategy and Execution, the Present and Future...Neil Horowitz
On episode 271 of the Digital and Social Media Sports Podcast, Neil chatted with Akshay Ram, Product Manager for Adobe, who also has a lot of knowledge and insight into sports creative.
What follows is a collection of snippets from the podcast. To hear the full interview and more, check out the podcast on all podcast platforms and at www.dsmsports.net
Euro Cup fans worldwide can book Euro 2024 Tickets from our online platform www.worldwideticketsandhospitality. Fans can book Ukraine Vs Belgium Tickets on our website at discounted prices.
Ukraine Euro Cup 2024 Squad Sergiy Rebrov's Selections and Prospects.docxEuro Cup 2024 Tickets
After securing their spot through the playoff route, Ukraine is gearing up for their fourth consecutive European Championship. Ukraine first qualified as hosts in 2012, but in 2016
Euro Cup fans worldwide can book Euro 2024 Tickets from our online platform www.worldwideticketsandhospitality. Fans can book Poland Vs Austria Tickets on our website at discounted prices.
Euro Cup fans worldwide can book Euro 2024 Tickets from our online platform www.worldwideticketsandhospitality. Fans can book Poland Vs Netherlands Tickets on our website at discounted prices.
Narrated Business Proposal for the Philadelphia Eaglescamrynascott12
Slide 1:
Welcome, and thank you for joining me today. We will explore a strategic proposal to enhance parking and traffic management at Lincoln Financial Field, aiming to improve the overall fan experience and operational efficiency. This comprehensive plan addresses existing challenges and leverages innovative solutions to create a smoother and more enjoyable experience for our fans.
Slide 2:
Picture this: It’s a crisp fall afternoon, driving towards Lincoln Financial Field. The atmosphere is electric—tailgaters grilling, fans in Eagles jerseys creating a sea of green and white. The air buzzes with camaraderie and anticipation. You park, join the throng, and make your way to your seat. The stadium roars as the Eagles take the field, sending chills down your spine. Each play is a thrilling dance of strategy and skill. This is what being an Eagles fan is all about—the joy, the pride, and the shared experience.
Slide 3:
But now, the day is marred by frustration. The excitement wanes as you struggle to find a parking spot. The congestion is overwhelming, and tempers flare. The delays mean you miss the pre-game excitement, the tailgate camaraderie, and even the opening kick-off. After the game, the joy of victory or the shared solace of defeat is overshadowed by the stress of navigating out of the parking lot. The gridlock, honking horns, and endless waiting drain the energy and joy from what should have been an unforgettable experience.
Our proposal aims to eliminate these frustrations, ensuring that from arrival to departure, your experience is extraordinary. Efficient parking and smooth traffic flow are key to maintaining the high spirits and excitement that make game days special.
Slide 4:
The Philadelphia Eagles are not just a premier NFL team; they are an integral part of the community, hosting games, concerts, and various events at Lincoln Financial Field. Our state-of-the-art stadium is designed to provide a world-class experience for every attendee. Whether it's the thrill of game day, the excitement of a live concert, or the camaraderie of community events, we pride ourselves on delivering a fan-first experience and maintaining operational excellence across all our activities. Our commitment to our fans and community is unwavering, and we continuously strive to enhance every aspect of their experience, ensuring they leave with unforgettable memories.
Slide 5:
Recent trends show an increasing demand for efficient event logistics. Our customer feedback has consistently highlighted frustrations with parking and traffic. Surveys indicate that a significant number of fans are dissatisfied with the current parking situation. Comparisons with other venues like Citizens Bank Park and Wells Fargo Center reveal that we lag in terms of parking efficiency and convenience. These insights underscore the urgent need for innovation to meet and exceed fan expectations.
Slide 6:
As we delve into the intricacies of our operations, one glaring issue emer
Spain's Euro Cup 2024 Selections and Croatia's Group of Death Challenge.docxEuro Cup 2024 Tickets
Chelsea's Marc Cucurella is one of only three Premier League players included in Spain's preliminary Euro Cup 2024 squad as the Tottenham star with 11 goal contributions is overlooked
Mats André Zuccarello Aasen, commonly known as Mats Zuccarello, was born on September 1, 1987, in
Oslo, Norway. He grew up in the bustling neighborhood of Løren, where his passion for ice hockey began
at a young age. His mother, Anita Zuccarello, is of Italian descent, and his father, Glenn Aasen, is
Norwegian. This multicultural background played a significant role in shaping his identity and versatility
on and off the ice.
Spain vs Italy Spain at Euro Cup 2024 Group, Fixtures, Players to Watch and M...Eticketing.co
Euro Cup 2024 fans worldwide can book Spain vs Italy Tickets from our online platform www.eticketing.co. Fans can book Euro Cup Germany Tickets on our website at discounted prices.
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Denmark vs England England Euro Cup squad guide Fixtures, predictions and bes...Eticketing.co
We offer UEFA Euro 2024 Tickets to admirers who can get Denmark vs England Tickets through our trusted online ticketing marketplace. Eticketing. co is the most reliable source for booking Euro Cup Final Tickets. Sign up for the latest Euro Cup Germany Ticket alert.
Belgium vs Slovakia Belgium announce provisional squad for Euro Cup 2024 Thib...Eticketing.co
Euro 2024 fans worldwide can book Belgium vs Slovakia Tickets from our online platform www.eticketing.co. Fans can book Euro Cup Germany Tickets on our website at discounted prices.
Euro Cup international supporters can book Euro 2024 Tickets from our online platform Worldwideticketsandhospitality.com. Followers can book Portugal Vs Czechia Tickets on our website at sale prices.
Turkey's Euro 2024 Squad Overview and Transfer Speculation.docxEuro Cup 2024 Tickets
Vincenzo Montella has announced a preliminary 35-man squad for Turkey ahead of the UEFA Euro 2024, which includes three Serie A players, Hakan Calhanoglu, Kenan Yildiz, and Zeki Celik
TAM Sports_IPL 17_Commercial Advertising_Report.pdf
Equipment Set Up Compound Bow
1. EQUIPMENT SET UP
COMPOUND BOW
Archery Australia Inc
Coaching and Standards Committee
Proudly Sponsored By
2. Compound Bow Set Up Version 2 September 2007 Page 2
Copyright Archery Australia September 2007
EQUIPMENT SET UP
COMPOUND BOW
It is important that equipment to be used must be set up correctly to allow the archer to obtain
maximum accuracy and performance.
This article assumes a person has just purchased a new compound bow and wants to set the bow up.
This process is very straight forward and set out in clear steps that should be followed.
1. STRING LENGTH AND BRACE HEIGHT
Compound bows come set up from the factory and you should not make any adjustment to string length
or brace height.
Such changes will take the bow outside the manufacturers design specifications and may affect the
bow weight range and draw length and also void any warranty.
2. TILLER AND BOW WEIGHT SET UP
All compound bows come with the facility to can change bow weight and tiller set up. For most bows the
bow weight range is around 10 lb.
With most modern compound bows, by changing the bow weight you do not change the draw length.
With older style compound bows as you changed the draw weight you also changed the draw length
and alternatively when you changed the draw length you changed the bow weight.
To change the bow weight/ tiller you simply use an “Allan” key and screw in or out each limb, in too
increase bow weight and out too decrease bow weight.
Compound bows work more efficiently when set at or close to the maximum weight.
Set the bow weight at your desired setting. The tiller is a measurement which indicates the weight
difference between the top and bottom limb. It is important as the grip (pivot point) of the bow is usually
in the centre of the bow but the arrow rest and nocking point are positioned above the centre.
With compound bows there a three adjustment points, tiller, cam (wheel) timing and nocking point. If
you change any one of these you will change the other two, so it’s best to only make controlled
adjustments.
Ideally you should set the tiller measurement to ZERO. This then allows
you to make all the necessary adjustments to the wheel timing which will
also effect the nocking point position.
3. Compound Bow Set Up Version 2 September 2007 Page 3
Copyright Archery Australia September 2007
3. ARROW REST AND BALANCED LIMB CENTRE
Arrow Rest
Unlike a recurve where the arrow pushed against the side of the bow upon release the action of the
arrow from a compound bow (shot using a release device) is downward, this is due to the action of the
cams and wheels.
Arrow rests for compound bows principally come in three styles, rigid, downward spring actions and
drop-a-way.
Which one is best is a personal choice.
.
Arrow rests can also be described as “Shoot Through” or “Shoot Over”.
“Shoot Through” usually means (found mainly on the spring loaded rest) the arrow rest can have two
arms and the arrow sits between the arms. In this case the “Index” fletch of the arrow must be
positioned DOWN when the arrow is nocked on the string, this allows for fletch clearance as the arrow
passes the rest.
“Shoot Over” can be found on both the rigid and spring rests. The “Index” fletch of the arrow must be
positioned UP when the arrow is nocked on the string, this allows for fletch clearance as the arrow
passes the rest.
Drop away rests can be either “Shoot Through” or “Shoot Over” design. Ideally you should position the
arrow with the index fletch pointing up but in theory the rest should have dropped away as the fletches
pass and clearance should not be a problem.
RIGID (Blade type) REST
The rigid rest has a blade (with slight downward
spring actions), simple, reliable and accurate, used
by many top archers. You can experience
clearance problems with the tail of the arrow
striking the arrow rest as it moves past the rest.
SPRING REST
This is possibly the most popular style rest. It has an
arm which is spring loaded downward and moves
down as the arrow moves forward. Simple and easy
to use but you can experience clearance problems
with the tail of the arrow striking the arrow rest as it
moves past the rest.
DROP AWAY REST
The drop-a-way rests design has the rest lifting into
position as the archer draws and then dropping
away as the arrow moves forward giving a clear
path for the arrow. This rest gives good arrow
clearance but it is critical that the rest lifts early in
the draw and drops late in the passage of the arrow
past the bow. If the rest drops too early the result
can be variable low arrows.
4. Compound Bow Set Up Version 2 September 2007 Page 4
Copyright Archery Australia September 2007
Ideally arrow rests should be fitted to the bow window so the contact point of the arrow on the rest is
directly above the “pivot point” of the bow. Recurve bows usually come pre-drilled with hole in the riser
for the plunger button.
Balanced Limb Centre
Unlike recurve bows, arrow rests on compound bows are not set up in centreshot but should be set up
in the “Balanced Limb Centre”.
To find the “Balanced Limb Centre” :-
1) Place a piece of tape on the inside of each limb as it leaves the riser.
Accurately measure and determine the centre of the limb (drawing 1), now
place a pen mark on the tape for the centre of the limb, on a recurve bow
this would be the centreshot.
2) Next measure and determine the limbs centre at the top and bottom of each
limb (see A in drawing).
3) Now measure the difference between the centre of the limb and the centre
of the string (see B in drawing 2), on most bows this will be about 3/16” or
4.8mm.
4) Now place a pen mark on the tape which will indicate the difference
between the centre of the limb and the string (drawing 3).
5) This second mark is the “Balanced Limb Centre” and should be used as the
reference point for setting up the rest.
Drawing 2
Bottom Limb Top Limb
Drawing 1
Bottom Limb Top Limb
Drawing 3
5. Compound Bow Set Up Version 2 September 2007 Page 5
Copyright Archery Australia September 2007
Drawing 4
For single cam bows carry out the same test using the single cam. As the string on many single cam
bows sits at an angle across the bow, set the rest up using the “Balanced Limb Centre” marks as a best
guess.
To set up the arrow rest: –
1) Stand the bow up (with the long stabiliser attached and
acting as a support) vertical with an arrow attached to the
string and on the arrow rest.
2) Stand behind the bow and line the string down the
“Balanced Limb Centre” marks on the limbs, observe the
position of the arrow shaft and point in relationship to the
string.
3) Adjust the arrow rest position so the arrow is centred to the
bow string.
4) The arrow rest has now been correctly adjusted with the
string.
The other point that must be considered is the position of the arrow
rest in relationship to the bow shelf.
Arrow rests on recurve bows are usually set up in relationship to the
mounting holes used for the plunger button.
This is the reason why we must have the nocking point mounted above
square on a recurve bow. The centre of most recurve bows is the grip
where the hand touches the bow, but the arrow rest is mounted high
on the riser to allow for adequate clearance for the arrow. Effectively
this results in the top limb being shorter than the bottom limb.
This is why we then must have different tillers on recurve bow limbs.
The bottom limb must be slightly heavier in draw weight (giving a
smaller measurement) then the top limb.
Most compound bows are made in the same traditional manner as
recurve bows. That is the centre of the bow is the grip (drawing 5) with the holes which are used to
attach the arrow rest position is the same point as a recurve bow. The common practice is to have the
centre of the arrow sit over the centre of these holes the same as a recurve bow.
In more recent times some compound bow manufactures have changed this practice and are making
the centre of the bow just above the arrow shelf and moving the mounting holes for the arrow rests
lower toward the bow shelf.
Why is this important? When we tune a compound bow we want to have both cams reach full draw
together and ultimately move forward together and release the arrow at the same time reducing up or
down forces on the arrow. By having the centre of the bow and the arrow close together makes timing
the cams much easier.
If your bow is manufactured with high arrow lower rest mounting holes, there is nothing stopping you
adjusting the arrow rest lower and closer to the bow shelf bringing the arrow closer to the bows centre,
of course you need to ensure you obtain clearance for the arrow as it passes the bow upon release.
In many cases the lower you can install the arrow rest toward the centre of the bow the easier you will
find the cams (wheels) can be timed.
For single cam compound bows the same principle applies, although for a slightly different reason.
With single cam compound bows you don’t have to worry about cam (wheel) timing but you do need to
ensure the arrow is leaving the bow in a straight line and not with an up or down action. It is much
easier to obtain straight nock travel when you have the rest as close to the centre of the bow as
possible.
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Of course we need to ensure there is no interference with the arrow rest and bow shelf and the arrow
has clearance as it passes the bow.
4. NOCKING POINT AND NOCK FIT
Nocking Point
Now that you have set up the arrow rest it is time to set up the nocking point.
To obtain consistent arrow flight, a point on the bowstring must be found at which the force of the string
will act directly along the shaft of the arrow upon release.
Initially this is only a temporary setting as it may change as you time the cams and carry out tests to
determine the correct nocking point position.
Setting the Nocking Points
a. Place a “Bow Square” onto the string and arrow rest, taking into account how the arrow sits on
the arrow rest.
b. As a starting point, install the nocking points so the centre of the arrow is square to the arrow
rest or slightly above square.
c. It is highly recommended that two nocking points always be used, a top and bottom nocking
point.
Drawing 5 Drawing 6
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There are two commonly used types of nocking points, a commercially available product called “Nok
Sets” (made of metal) and a tie on type that only requires a length of bowstring serving material to be
applied.
“Nok Sets” are very popular when setting up equipment as they are easy to move, but tie on nocking
points are recommended for long term use.
Refer to the Archery Australia “How to Manual” to find directions on tie on nocking points.
String Loops
String loops have become very popular in recent years. Usually the release device has a string loop
which fits around the string and onto the release jaw to hold the string.
String loops replace the string loop on the release device and are attached directly to the string. The
jaws of the released device then attach to the string loop.
There are two different loop designs. One that attaches to the string on each side of the arrow and one
that attaches to the string below the arrow.
It is important that you use string loops in association with nocking points, never use a string loop on its
own.
The theory behind string loops, particularly the one that attaches above and below the arrow, is that the
string is being drawn directly behind the arrow and not below the arrow which is the case with the loops
attached to a release device.
It is believed that string loops reduce string wear, give a more direct draw behind the arrow and if there
is the need to let down the arrow remains in the string, it is common for arrows to fall of the string when
being let down.
Refer to the Archery Australia “How to Manual” to find directions on attaching string loops.
Nock Fit
When setting up a bow it is important that the arrow fits correctly onto the string. Most nocks made are
designed to snap onto the bow string. It is important that the fit is not too tight or too loose.
The nock should fit in such a way that it snaps onto the string but still has enough movement to freely
slide up and down the string. As you draw a bow back the string can rotate as you draw, the nock fit
should be such as to allow this rotation without placing excess side force on the arrow.
This is particularly important on compound bows as the string rotation will affect the “Peep Sight”
Many brands of nocks come with two hole sizes, .88 mm and .98 mm also called small or large hole.
Ensure you have selected the appropriate hole size that gives you a good nock fit.
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You can also vary the nock fit by using different size serving material. Alternatively you can increase the
strings diameter laying additional strands of string material under the serving.
Never wrap material (usually dental floss or cotton thread) around the nocking point to build up the
serving. This should be used as a temporary measure only and should never be used permanently.
This material can quickly wear giving you a poor fitting nock.
5. CABLE GUARD
Compound bows come fitted with a “Cable Guard”. These are fitted either at the lower half of the riser
or more commonly on the upper half of the riser.
Cable guards are designed to keep the cables under tension and away from the path of the arrow as it
moves forward.
Many cable guards are adjustable and you should make the necessary adjustment to ensure adequate
clearance as the arrow moves forward but you should also ensure you do not have excessive side force
on the cables.
Cable guards are also fitted with a “Cable Slide” these are designed to hold the cables and to keep the
cables apart to eliminate wear.
6. DRAW LENGTH
At this stage in the setting up of a compound bow you should set the draw length. Each brand of bow
and model may have different methods of adjusting draw length such as adjustable modules or
replaceable modules.
Some brands have no adjustment and to change draw length you must purchase different size cams
and cables which can be an expensive exercise. When purchasing one of these bows you must know
exactly the draw length you require.
Follow the manufactures instructions for changing draw length. With most brands of compound bows
you can make draw length changes without the need to take any pressure of the bow.
7. Peep Sight
The next step is to install the peep sight. Peep sights sit between the strands
of the string. To hold the peep in the string we attach moveable knots to either
end of the peep sight.
To install –
1) Split the string evenly in half. It may be necessary to place the bow in a
bow press to remove tension off the string to enable you to do this.
2) Draw the bow back to your anchor point and move the peep up or down
until you can clearly see through the sight.
NOTE - Unlike recurve bows, the anchor point using a compound bow and
peep sight, floats and is in a different position on the face for each distance.
At long distance the anchor is low on your face and at short distance is high
on your face. For comfort it is recommended that you set the peep sight
aiming at a mid range distance.
3) Now tie the peep into the string by tying knots above and below the peep.
Don’t tie around the centre of the peep it is not necessary and will prevent you
from making adjustments later to ensure the peep is always square to your
eye when at full draw.
It should be noted that the manufacturer of peep sights recommends that they
be tied around the centre but this is not necessary.
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4) The peep sight is now installed. You will possibly find as you draw the bow back the peep will rotate.
This is normal and it may be necessary to make adjustments to prevent this from happening. Ideally
the peep should be square to the eye at full draw, you should be looking through a perfect circle.
If not, to correct, pull the knots apart holding the peep in place and move one or two strands from side
of the peep to the other, changing the balance of the string. Now move the knots back into place and try
again. This is a trial and error process, there is no set method as to which way you should move the
strands.
Points to consider: –
1) The fit of the nock on the string will affect the rotation of the peep sight.
2) When moving strands from one side to the other use a tool that will not cut or damage the string. A
piece of arrow shaft about 100 mm long with an Easton G nock fitted to the piece of arrow shaft works
well, as the ears of the nock are smooth and will not damage the string material.
QUESTION – Why do peep sights rotate?
There are many different opinions and theories related to this question many relate to the manufacture
of bow string and the tension of each individual strand. But these theories are not correct. The simply
explanation is the cables and string are under tension up to the point where the cams (wheels) roll over.
At this point the cables maintain their tension (and in most cases increase the tension) but the string
looses tension very quickly due to the let off and the result is the string rotates due to this loss of
tension.
Just like tying a piece of string to a stationary object and pulling the string tight, then have someone cut
the string and when the tension is quickly released the string twists and flexes as the tension is
removed from the string. The same applies to a bow string although maybe less dramatic, as the
tension comes off the string the string twists as a reaction to the loss of tension, it is unavoidable but
can be controlled.
In the old days when Dacron strings were used on compound bows the twisting was not consistent and
difficult to maintain a square peep sight. But with the modern non stretch strings the twisting is
consistent and predictable.
It should be noted that changes in temperature and humidity over a days shooting can change the
amount of rotation of the string. With practice, this can be corrected simply by pulling the knots (holding
the peep sight in the string) apart and moving one or two strands from one side of the peep to the other,
remembering to move them back after shooting.
8. WHEEL/CAM TIMING
The critical element of setting up and tuning a compound bow is timing of the cams (wheels). Ideally
both cams (wheels) should reach full draw at the same time and move forward together reaching brace
height and releasing the arrow at the same time.
It should be noted that cam (wheel) timing is usually not required with single cam bows. These are self
aligning although it is necessary to ensure the limb tiller is correct so the handle is vertical when at full
draw.
To check wheel timing draw back the bow with the release device and observe the cams as they come
to full draw. Both cams should arrive at full draw and roll over together, if not then you need to make
adjustments.
Place the bow into a bow press and remove tension off the bow.
Remove one of the cables from the cam (wheel) and either add or
remove twists as required.
Replace cable on cam (wheel) and remove tension and re-check timing
again.
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Before you check the timing again it is important to reposition the nocking points as they may have
altered position in relationship to the arrow rest.
You must check and if necessary re-adjust the nocking points after each time you add twists to the
cables.
9 BOW SIGHT
Compound bows use a sight and scope combination. The scope is a magnifying sight with a bubble
level to help in holding the bow vertical.
You need to set the sight up to ensure the sight bar and the bubble is square to the bow string.
Scopes have three axis planes and these need to be set up to ensure accuracy.
1
st
Axis This is the basic axis and relates to the scopes orientation to the string. Ideally the
scope should be aligned to the peep sight position at full draw so it may need to be
angled about 2
o
to 4
o
above square.
2
nd
Axis This is the most critical of the three axis adjustments as it effects day to day shooting.
The 2
nd
axis relates to the bubble being square to the sight bar and bow string. If the
bubble is not square to the sight bar you will get inconsistent left to right arrows.
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3
rd
Axis This axis is critical when shooting up and down hills such as in Field Archery and
relates to the scope lens being square to the eye.
The best method for vertically setting the sight bar with the bow string is to:-
1) Fit the scope onto the sight, and set the 1
st
axis.
2) Lay the bow onto a flat surface, a table or bench.
3) Using a “Builders String Level” attached to the string and pack up either end of the riser until
the string is level (picture 1)
4) Without moving the bow’s position remove the “Builders String Level” from the string and place
on the side of the bar.
5) Now loosen the screws holding the extension bar to the sight bar and adjust until level.
Retighten the screws (picture 2).
The sight bar is now level with the bow string.
6) The next step is to set up the 2nd axis. Ideally you should have a scope levelling device to do
this but you can use a straight, vertical surface.
Adjust the scope in the 2
nd
axis until the bubble is square with sight bar (picture 3).
7) The final step is to set the 3
rd
axis, but not all bow sights come with this feature. To check the
3
rd
axis raise the sight to about 30
o
and then lower to about 30
o.
Check the bubble is still level, it
may vary in the 3
rd
axis from the 2
nd
axis. Make the appropriate adjustments to set the bubble in
the centre at the 3
rd
axis. Adjusting the 3
rd
axis will not change the 2
nd
axis setting, although this
may depend upon sight design.
Picture 4
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10. TUNING YOUR BOW
Where to from here?
For new archers setting up their first bow this should be all you need to do. The bow has been set up
and is good enough to shoot and for them to gain experience and raise their ability.
If you wish to tune your bow further you should follow the “Paper Test” method to check and fine tune
the bow, but it should be remembered the results you obtain are directly reflected by your ability and
your shooting standard. Before making major changes and adjustments to your equipment always
check for clearance and in particular your shooting technique.
Copyright Archery Australia September 2007
Written and images by Jim Larven
Editor James Park