More than Just Lines on a Map: Best Practices for U.S Bike Routes
Pneumatic Gun
1. ME 751A PROJECT
Task Force
Ankit Shrivastava (11113), Ankit Yadav (11115), Ahsen Parwez (11416),
Riya Khurana (11606), Shivam Patel (11683), Utkarsh Bagri (11777)
Project Title - Arsenal
2. OBJECTIVE
• Design and manufacture working models of turret and sniper rifle
• Gaining hands-on experience of design and fabrication
• Experience importance of team work, coordination and planning
• To have fun and secure 50% course marks
4. DESIGN - SNIPER
BASIC PARTS :
The Chamber
The Gun Body
Stock
(Proposed)
The Muzzle
Trigger Valve
Trigger Assembly
5. MECHANISM - SNIPER
• Pressurised air filled into the chamber.
• Air is released as the Blow gun valve switch is shifted to its “On” position. The switch of
the valve is turned on manually to fire the sniper. This could be triggered using a trigger
assembly which was designed but not incorporated in our model.
• This leads to the firing of the deadly canon stored in the muzzle of the gun.
• After fire the slider magazine allows us to reload a new canon into the muzzle.
• And lastly, why the stock ?
• It simply serves the purpose of supporting the shoulder on fire.
6. SNIPER SPECIFICATIONS
• 0.6 caliber aluminium bullet
• The barrel can withstand pressures upto 5 MPa
• Range – 150 ft to 200 ft
• Adjustable barrel length – can be used either as a rifle or
a carbine depending on range, accuracy and
maneuverability required
9. MECHANISM - TURRET
• Powered by slingshot mechanism
• One end of rubber band fixed to muzzle.
• Elastic band goes through a slotted wood launcher which finally hits the ammo inside the
muzzle
• Launcher is pulled manually similar to a cross-bow to fire the ammo
10. TURRET SPECIFICATIONS
• Ammo – Assorted. Any cylindrical object with sufficient weight, about 15cm
long and 10mm in diameter can be a potential ammo. We used pencils and
pens for safety considerations.
• Range – Depends on the elastic and ammo used. We achieved 30 ft.
• Field of View – About 300 in azimuthal angle and 3600 about the outward
normal.
13. MATERIAL SELECTION
• We selected PPR pipes and
connections
• Can sustain high air pressure
• Used in compressor fittings
• Can be joined easily by hot air gun
• We selected wood for turret
• Easy to work with
• Cheap
• Easy to incorporate design changes
14. Material Cost
PPR Pipes – 0.75”, 1”, 1.25”, 2” (4ft each) 1280
Threaded Couplings – 1” X 2 75 X 2
Couplings – 1” X 3 50 X 3
Reducer – 2” to 1” 40
Reducer – 1.25” to 1” 40
Reducer – 1” to 0.75” 40
End Caps – 2” and 0.75” 35 X 2
T – 1” X 2 25 X 2
Blowgun Valve – 1 320
Elbow 90° - 1” X 5 20 X 5
Wood 1500
Slingshot Rubber 30
Total 3670
MATERIALS PROCURED AND COST INCURRED
15. EXECUTION PLAN
Sr No Work Proposed Deadline Responsibility Present Status
1 Mechanism Design January 31, 2014 for sniper
and February 7 for turret
Ahsen Parwez, Ankit Shrivastava Done
2 Finalizing Dimensions February 14, 2014 Ahsen Parwez,
Riya Khurana,
Ankit Shrivastava
Done
3 Material Selection March 3, 2014 Utkarsh Bagri, Ankit Yadav, Shivam
Patel, Riya Khurana
Done
4 Arranging Materials March 14, 2014 Utkarsh Bagri, Ankit Yadav, Shivam
Patel
Done
5 Fabrication April 6, 2014 Ahsen Parwez, Ankit Shrivastava,
Utkarsh Bagri, Ankit Yadav, Shivam
Patel, Riya Khurana
Done with some design
modifications
6 Field Testing April 14, 2014 Ahsen Parwez, Ankit Shrivastava,
Utkarsh Bagri, Ankit Yadav, Shivam
Patel, Riya Khurana
Done
16. FURTHER IMPROVISATIONS POSSIBLE
SNIPER
• A trigger mechanism using the
elastic force of elastic bands
instead of manual operation
(design enclosed)
• A binocular to set target
• A stand to allow fire in resting
position
TURRET
• Automated firing using a disc with
a spoke protruding out of its
periphery allowing elastic band to
be pulled and the disc rotation can
be done using a motor attached.
• Mounting on wheels to enhance
portability
• Locking mechanism to avoid recoil
17. SNIPER TRIGGER MECHANISM (Designed)
Unfortunately , this feature couldn’t be included in our model because of paucity of time