This document describes several patents for slingshots and related devices filed between 1950 and 1974. The patents include improvements to the fork, elastic bands, grips, and arm braces of slingshots to increase stability, accuracy, and power. Specifically, the documents detail (1) different fork and sling designs, (2) grips and wrist braces to reduce recoil, and (3) range indicators and sights to improve aiming. The summaries showcase innovative slingshot technologies over time.
This document provides information about a Savonius-type vertical axis wind turbine that can generate 200 watts of power at 12 volts. It describes the design of Savonius turbines, the advantages of their vertical axis configuration, and includes plans to build a turbine using readily available parts like an automotive alternator. The document aims to educate readers on small-scale wind power solutions and includes additional resources on wind energy topics.
This document provides instructions for constructing a homemade silencer for a .22 caliber rifle or pistol using common household materials. The silencer is designed to muffle the sound of firing to make it less detectable. It works by drilling holes in a metal tube and packing it with steel wool and grease to absorb gunshot noise and gases. The tube is attached to the gun barrel using fiberglass resin and tape to form a tight seal.
This document provides instructions for building various types of deadfall traps using locally available materials like saplings, poles, rocks, and stakes. It describes the basic pole deadfall, emphasizing the importance of a small animal pen, trigger system, and use of bait. Additional deadfall designs are presented for small animals. Trappers are advised to carefully construct pens, cover traps with natural materials, and consider weighting falls for smaller saplings. Deadfalls are praised for requiring no investment, avoiding injury to fur, and killing animals quickly and quietly.
This document contains information about measuring head and flow for micro hydro sites, as well as formulas and tables related to water turbines, piping, and electrical systems. It includes methods for measuring the height difference or "head" between the water source and turbine location. Formulas and a table provide guidance on estimating head loss through plastic pipes of different diameters and flow rates. Additional sections cover topics like penstock and canal sizing, waterpower and electrical formulas, and DC motor wiring diagrams.
This document provides instructions and circuit diagrams for various LED projects, including flashing a LED, using constant current to power multiple LEDs, powering a white LED with a 1.5V battery, and a shake-activated torch circuit using a magnet and coil. It discusses important LED concepts such as characteristic voltage drop and using a current-limiting resistor. The document contains over 50 circuits and projects utilizing LEDs.
This document provides a summary of Lawrie Lang's successful efforts to build a working water wheel on a creek near his property, despite being told by experts it could not be done. He constructed the water wheel out of recycled materials, including an old derelict timber mill wheel. Through gearing, the water wheel turns at 12 rpm and powers a generator via 3 gearing steps to increase the speed to 3,000 rpm, generating 1.8 kW of power from a water flow of 12 cubic feet per second. The system uses an electronic governor to vary the water wheel speed according to the load. Overall, the water wheel project proved the experts wrong and generates clean power for Lawrie's home.
The document provides instructions for constructing a Michell or Banki turbine, which is a simple and efficient means of harnessing small streams to generate electricity or mechanical power. It consists of a runner with curved horizontal blades fixed between circular end plates, through which water passes twice in a narrow jet. The turbine can be built using common materials like steel pipe and plate and requires only basic tools. Detailed guidelines are given for site selection, design considerations, construction steps, installation, maintenance and applications. The turbine is suitable for a wide range of water flows and heads, and can be an economical small-scale power source where access to other fuels is limited.
This document describes several patents for slingshots and related devices filed between 1950 and 1974. The patents include improvements to the fork, elastic bands, grips, and arm braces of slingshots to increase stability, accuracy, and power. Specifically, the documents detail (1) different fork and sling designs, (2) grips and wrist braces to reduce recoil, and (3) range indicators and sights to improve aiming. The summaries showcase innovative slingshot technologies over time.
This document provides information about a Savonius-type vertical axis wind turbine that can generate 200 watts of power at 12 volts. It describes the design of Savonius turbines, the advantages of their vertical axis configuration, and includes plans to build a turbine using readily available parts like an automotive alternator. The document aims to educate readers on small-scale wind power solutions and includes additional resources on wind energy topics.
This document provides instructions for constructing a homemade silencer for a .22 caliber rifle or pistol using common household materials. The silencer is designed to muffle the sound of firing to make it less detectable. It works by drilling holes in a metal tube and packing it with steel wool and grease to absorb gunshot noise and gases. The tube is attached to the gun barrel using fiberglass resin and tape to form a tight seal.
This document provides instructions for building various types of deadfall traps using locally available materials like saplings, poles, rocks, and stakes. It describes the basic pole deadfall, emphasizing the importance of a small animal pen, trigger system, and use of bait. Additional deadfall designs are presented for small animals. Trappers are advised to carefully construct pens, cover traps with natural materials, and consider weighting falls for smaller saplings. Deadfalls are praised for requiring no investment, avoiding injury to fur, and killing animals quickly and quietly.
This document contains information about measuring head and flow for micro hydro sites, as well as formulas and tables related to water turbines, piping, and electrical systems. It includes methods for measuring the height difference or "head" between the water source and turbine location. Formulas and a table provide guidance on estimating head loss through plastic pipes of different diameters and flow rates. Additional sections cover topics like penstock and canal sizing, waterpower and electrical formulas, and DC motor wiring diagrams.
This document provides instructions and circuit diagrams for various LED projects, including flashing a LED, using constant current to power multiple LEDs, powering a white LED with a 1.5V battery, and a shake-activated torch circuit using a magnet and coil. It discusses important LED concepts such as characteristic voltage drop and using a current-limiting resistor. The document contains over 50 circuits and projects utilizing LEDs.
This document provides a summary of Lawrie Lang's successful efforts to build a working water wheel on a creek near his property, despite being told by experts it could not be done. He constructed the water wheel out of recycled materials, including an old derelict timber mill wheel. Through gearing, the water wheel turns at 12 rpm and powers a generator via 3 gearing steps to increase the speed to 3,000 rpm, generating 1.8 kW of power from a water flow of 12 cubic feet per second. The system uses an electronic governor to vary the water wheel speed according to the load. Overall, the water wheel project proved the experts wrong and generates clean power for Lawrie's home.
The document provides instructions for constructing a Michell or Banki turbine, which is a simple and efficient means of harnessing small streams to generate electricity or mechanical power. It consists of a runner with curved horizontal blades fixed between circular end plates, through which water passes twice in a narrow jet. The turbine can be built using common materials like steel pipe and plate and requires only basic tools. Detailed guidelines are given for site selection, design considerations, construction steps, installation, maintenance and applications. The turbine is suitable for a wide range of water flows and heads, and can be an economical small-scale power source where access to other fuels is limited.
The document contains a list of drawings for different types of knives and blades, including bowie knives, daggers, folders, hunters, skinners, and templates. It also mentions drop points and wedding covers.
1. A pistol includes a firing pin safety in the form of a resilient tongue attached to the breech part. The tongue has a hook that engages a shoulder on the striker when cocked. It also has a downward web that interacts with the trigger arm.
2. When the trigger is pulled, the trigger arm moves longitudinally and its finger pushes the resilient tongue's web outward, disengaging the hook from the striker shoulder.
3. The resilient tongue is integrally formed with an ejector spring that acts on an ejector claw, providing a simple, combined spring mechanism.
Coffer dams are temporary structures built to retain water and soil in order to create a dry work area for construction projects. There are several types of coffer dams suited to different conditions, including earth-filled, sheet pile, and cellular designs. Key considerations in selecting a coffer dam include water depth, area size, soil/river bed conditions, and potential for erosion or flooding. Proper design is needed to withstand hydrostatic pressures and ensure structural integrity until the permanent structure is complete.
This document is a catalog from Potato Delivery Systems promoting their line of high-powered potato guns. The guns can launch potatoes or tennis balls up to 400 mph and 200+ yards. They come in models powered by aerosol spray or MAPP gas, ranging from $119 to $489. Models include the MG-11 Carbine entry-level gun, and higher-end options like the VX-3 Sabre which has quick-release barrels and a fueling system for rapid firing. Accessories like additional barrels are also advertised.
The document is a European patent application that describes an improved connection between the barrel and grip of a tilting barrel firearm. Specifically, it discloses a tilting barrel firearm with a frame and barrel connected by a pivot joint, wherein the pivot joint has a hollow pivot bore accommodating two cylindrical pivot pins inserted from each end. The pivot pins have enlarged heads on the rearward end and are secured axially in the pivot bore by resilient expanding rings. The application claims an insoluble connection between the barrel and grip achieved using this pivot joint configuration.
This document provides a complete system of instruction for heavy artillery, including siege, garrison, sea-coast and mountain artillery. It begins with an introduction and is divided into three parts: 1) Serving Heavy Artillery, which provides detailed lessons on operating different types of artillery pieces and carriages, 2) Mechanical Maneuvers, covering the handling and movement of artillery, and 3) Miscellaneous, with tables of artillery dimensions, weights and other specifications. The system of instruction was prepared by a board of Army officers and adopted for use by the U.S. Army and state militias.
Small scale-water-current-turbines-for-river-applicationsToz Koparan
The document provides an overview of small-scale water current turbines for river applications with a power output of 0.5-5 kW. It discusses the technology of water current turbines, which produce electricity directly from flowing water without the need for dams. The most common turbine types are axial flow and cross-flow turbines. Performance is influenced by whether the turbine is ducted or not and where it is placed within the river flow. The document summarizes several commercial water current turbine companies from different countries and their technologies. It concludes that small-scale hydro power from water current turbines can reliably supply electricity to remote communities due to its low cost and environmental friendliness.
The document discusses how to make an electric motorcycle vest for warmth. It begins by explaining the history and benefits of homemade electric vests compared to store-bought ones. It then provides details on various vest design options from simple to more complex commercial-quality designs. The document emphasizes testing wire resistance and includes formulas for calculating wattage and resistance needs. Safety tips are provided along with lessons learned from experiences making vests. Links to additional resources on techniques and materials are referenced throughout.
This document provides guidance for youth on designing their own model rocket through the Ohio 4-H program. It discusses safety requirements, including following the Model Rocket Safety Code. Design options covered include clustering multiple engines, staging rockets, different fin and nose cone styles, and adding electronics. Stability is also addressed, including calculating center of gravity and pressure. Sample rocket project designs are presented at the end.
This document describes a PhD thesis on the mathematical modeling of the mechanics of the bow and arrow. It introduces different types of bows, including non-recurve, static-recurve, and working-recurve bows. It outlines the mathematical models developed in subsequent chapters to simulate the static deformation of bows under bracing and drawing as well as the dynamic motion of bows and arrows during shooting. The goal of the mathematical simulation is to provide theoretical experiments to analyze how factors like bow design, materials, and construction influence the mechanical performance of bows.
The document discusses the design of bows and introduces classifications of different bow types. It defines key parameters used to describe bow design, including dimensions, material properties, and mass distributions. Dimensional analysis is used to define two important performance metrics: energy storage capacity per unit mass and a shape factor measuring material usage in bending. Constraints on parameters due to material strength define feasible design regions, and sensitivity analysis is used to evaluate how parameters influence performance coefficients related to energy, efficiency, and arrow velocity.
This document provides instructions for making a takedown recurve bow. It lists the necessary tools and materials, which include a youth bow kit, wood, metal plates and screws. It then provides 18 steps to assemble the bow, including cutting the limbs to length, drilling holes to attach the limbs to the wooden riser grip, and adding metal plates and screws to connect the limbs securely while allowing them to be detached. The final steps include stringing the bow and making a carrying case.
Anatomy of wooden core of ottoman composite archery bowsToz Koparan
This document summarizes a study on the wooden cores of Ottoman composite archery bows. Through wood anatomical analysis, the researchers identified the core of one such bow from the 1800s as maple wood (Acer sp.), likely field maple. Key properties for maple wood identification include helical thickenings in vessel elements. These thickenings increase the bonding surface between the wood and other bow materials like sinew and horn. Historically, various woods have been used for bow making based on availability and anatomical properties conducive to efficiency, such as helical thickenings that enhance flexibility.
Mini Gun Diillonaero catalog online_feb_2008_2Toz Koparan
This document provides product information for the Dillon Aerospace M134D mini gun, including specifications, components, performance stats, and applications. Some key details:
- The M134D is a 6-barreled electrically powered Gatling gun that can fire at 3,000 or 4,000 rounds per minute. It weighs between 45-67 pounds depending on materials.
- Upgrades include a reliable feeder/delinker, durable clutch assembly, simple gun control unit and ergonomic grips.
- The high rate of fire makes the M134D very stable, accurate due to dense shot grouping, and reliable with few stoppages.
- Applications include aircraft, ships, vehicles
CapTechTalks Webinar Slides June 2024 Donovan Wright.pptxCapitolTechU
Slides from a Capitol Technology University webinar held June 20, 2024. The webinar featured Dr. Donovan Wright, presenting on the Department of Defense Digital Transformation.
Level 3 NCEA - NZ: A Nation In the Making 1872 - 1900 SML.pptHenry Hollis
The History of NZ 1870-1900.
Making of a Nation.
From the NZ Wars to Liberals,
Richard Seddon, George Grey,
Social Laboratory, New Zealand,
Confiscations, Kotahitanga, Kingitanga, Parliament, Suffrage, Repudiation, Economic Change, Agriculture, Gold Mining, Timber, Flax, Sheep, Dairying,
The document contains a list of drawings for different types of knives and blades, including bowie knives, daggers, folders, hunters, skinners, and templates. It also mentions drop points and wedding covers.
1. A pistol includes a firing pin safety in the form of a resilient tongue attached to the breech part. The tongue has a hook that engages a shoulder on the striker when cocked. It also has a downward web that interacts with the trigger arm.
2. When the trigger is pulled, the trigger arm moves longitudinally and its finger pushes the resilient tongue's web outward, disengaging the hook from the striker shoulder.
3. The resilient tongue is integrally formed with an ejector spring that acts on an ejector claw, providing a simple, combined spring mechanism.
Coffer dams are temporary structures built to retain water and soil in order to create a dry work area for construction projects. There are several types of coffer dams suited to different conditions, including earth-filled, sheet pile, and cellular designs. Key considerations in selecting a coffer dam include water depth, area size, soil/river bed conditions, and potential for erosion or flooding. Proper design is needed to withstand hydrostatic pressures and ensure structural integrity until the permanent structure is complete.
This document is a catalog from Potato Delivery Systems promoting their line of high-powered potato guns. The guns can launch potatoes or tennis balls up to 400 mph and 200+ yards. They come in models powered by aerosol spray or MAPP gas, ranging from $119 to $489. Models include the MG-11 Carbine entry-level gun, and higher-end options like the VX-3 Sabre which has quick-release barrels and a fueling system for rapid firing. Accessories like additional barrels are also advertised.
The document is a European patent application that describes an improved connection between the barrel and grip of a tilting barrel firearm. Specifically, it discloses a tilting barrel firearm with a frame and barrel connected by a pivot joint, wherein the pivot joint has a hollow pivot bore accommodating two cylindrical pivot pins inserted from each end. The pivot pins have enlarged heads on the rearward end and are secured axially in the pivot bore by resilient expanding rings. The application claims an insoluble connection between the barrel and grip achieved using this pivot joint configuration.
This document provides a complete system of instruction for heavy artillery, including siege, garrison, sea-coast and mountain artillery. It begins with an introduction and is divided into three parts: 1) Serving Heavy Artillery, which provides detailed lessons on operating different types of artillery pieces and carriages, 2) Mechanical Maneuvers, covering the handling and movement of artillery, and 3) Miscellaneous, with tables of artillery dimensions, weights and other specifications. The system of instruction was prepared by a board of Army officers and adopted for use by the U.S. Army and state militias.
Small scale-water-current-turbines-for-river-applicationsToz Koparan
The document provides an overview of small-scale water current turbines for river applications with a power output of 0.5-5 kW. It discusses the technology of water current turbines, which produce electricity directly from flowing water without the need for dams. The most common turbine types are axial flow and cross-flow turbines. Performance is influenced by whether the turbine is ducted or not and where it is placed within the river flow. The document summarizes several commercial water current turbine companies from different countries and their technologies. It concludes that small-scale hydro power from water current turbines can reliably supply electricity to remote communities due to its low cost and environmental friendliness.
The document discusses how to make an electric motorcycle vest for warmth. It begins by explaining the history and benefits of homemade electric vests compared to store-bought ones. It then provides details on various vest design options from simple to more complex commercial-quality designs. The document emphasizes testing wire resistance and includes formulas for calculating wattage and resistance needs. Safety tips are provided along with lessons learned from experiences making vests. Links to additional resources on techniques and materials are referenced throughout.
This document provides guidance for youth on designing their own model rocket through the Ohio 4-H program. It discusses safety requirements, including following the Model Rocket Safety Code. Design options covered include clustering multiple engines, staging rockets, different fin and nose cone styles, and adding electronics. Stability is also addressed, including calculating center of gravity and pressure. Sample rocket project designs are presented at the end.
This document describes a PhD thesis on the mathematical modeling of the mechanics of the bow and arrow. It introduces different types of bows, including non-recurve, static-recurve, and working-recurve bows. It outlines the mathematical models developed in subsequent chapters to simulate the static deformation of bows under bracing and drawing as well as the dynamic motion of bows and arrows during shooting. The goal of the mathematical simulation is to provide theoretical experiments to analyze how factors like bow design, materials, and construction influence the mechanical performance of bows.
The document discusses the design of bows and introduces classifications of different bow types. It defines key parameters used to describe bow design, including dimensions, material properties, and mass distributions. Dimensional analysis is used to define two important performance metrics: energy storage capacity per unit mass and a shape factor measuring material usage in bending. Constraints on parameters due to material strength define feasible design regions, and sensitivity analysis is used to evaluate how parameters influence performance coefficients related to energy, efficiency, and arrow velocity.
This document provides instructions for making a takedown recurve bow. It lists the necessary tools and materials, which include a youth bow kit, wood, metal plates and screws. It then provides 18 steps to assemble the bow, including cutting the limbs to length, drilling holes to attach the limbs to the wooden riser grip, and adding metal plates and screws to connect the limbs securely while allowing them to be detached. The final steps include stringing the bow and making a carrying case.
Anatomy of wooden core of ottoman composite archery bowsToz Koparan
This document summarizes a study on the wooden cores of Ottoman composite archery bows. Through wood anatomical analysis, the researchers identified the core of one such bow from the 1800s as maple wood (Acer sp.), likely field maple. Key properties for maple wood identification include helical thickenings in vessel elements. These thickenings increase the bonding surface between the wood and other bow materials like sinew and horn. Historically, various woods have been used for bow making based on availability and anatomical properties conducive to efficiency, such as helical thickenings that enhance flexibility.
Mini Gun Diillonaero catalog online_feb_2008_2Toz Koparan
This document provides product information for the Dillon Aerospace M134D mini gun, including specifications, components, performance stats, and applications. Some key details:
- The M134D is a 6-barreled electrically powered Gatling gun that can fire at 3,000 or 4,000 rounds per minute. It weighs between 45-67 pounds depending on materials.
- Upgrades include a reliable feeder/delinker, durable clutch assembly, simple gun control unit and ergonomic grips.
- The high rate of fire makes the M134D very stable, accurate due to dense shot grouping, and reliable with few stoppages.
- Applications include aircraft, ships, vehicles
CapTechTalks Webinar Slides June 2024 Donovan Wright.pptxCapitolTechU
Slides from a Capitol Technology University webinar held June 20, 2024. The webinar featured Dr. Donovan Wright, presenting on the Department of Defense Digital Transformation.
Level 3 NCEA - NZ: A Nation In the Making 1872 - 1900 SML.pptHenry Hollis
The History of NZ 1870-1900.
Making of a Nation.
From the NZ Wars to Liberals,
Richard Seddon, George Grey,
Social Laboratory, New Zealand,
Confiscations, Kotahitanga, Kingitanga, Parliament, Suffrage, Repudiation, Economic Change, Agriculture, Gold Mining, Timber, Flax, Sheep, Dairying,
A Free 200-Page eBook ~ Brain and Mind Exercise.pptxOH TEIK BIN
(A Free eBook comprising 3 Sets of Presentation of a selection of Puzzles, Brain Teasers and Thinking Problems to exercise both the mind and the Right and Left Brain. To help keep the mind and brain fit and healthy. Good for both the young and old alike.
Answers are given for all the puzzles and problems.)
With Metta,
Bro. Oh Teik Bin 🙏🤓🤔🥰
Brand Guideline of Bashundhara A4 Paper - 2024khabri85
It outlines the basic identity elements such as symbol, logotype, colors, and typefaces. It provides examples of applying the identity to materials like letterhead, business cards, reports, folders, and websites.
Creative Restart 2024: Mike Martin - Finding a way around “no”Taste
Ideas that are good for business and good for the world that we live in, are what I’m passionate about.
Some ideas take a year to make, some take 8 years. I want to share two projects that best illustrate this and why it is never good to stop at “no”.
1. Making an Archer's Thumb Ring
from Cow Horn, Antler or Bone
by Mike Richardson
I get a lot of e-mails asking where to get an archer's thumb ring. The best thing is to make your
own. It needs to be fitted to each person's thumb, since every thumb is different. So, making your
own archer's thumb ring is the best advice I can give.
You can use hand tools, but for speed, I use a 5" angle grinder with a 36 grit flap disc for most of
the roughing out and shaping. I also utilize a cordless drill and 1/2" paddle bit to drill out the
thumb hole. A 1/2" rat tail file is used for fitting the hole to your thumb and assorted sandpapers
are used for finishing the thumb ring. I grind in a string stop and keep the tab longer than the end
of your thumb and wider than the thumb pad.
This series of images are fairly self-explanatory to make an archer's thumb ring.
Cutting the horn.