Shinigami
Table of Contents
1. Background information 2. Design of Launcher 3. Calculations of the Engineering Specifications 4. Performance of the Glider 5. Launcher According to Newton’s Laws 6. Compare/Contrast of Launcher Designs
1. Background Info
Provide a brief discussion of the history of ballistics. Discuss the purpose of this project and how do you think it relates back to designs in history. You may consider discussing catapults, trebuchets, current ballistic technology, or any other connections you would want to discuss
This year in Applied Physics B we have taken part in a couple of scientific projects. The first dealt with bridges and the importance of structural form and equally distributed weight. This quarter we launched into an experiment that focused on projectile motion.
2. Design of the Launcher
Materials
- ____ cm of 4’’ diameter PVC Schedule 40
- ____ cm of 3’’ diameter PVC Schedule 40
- 4’’ diameter PVC Endcap
- 4’’ diameter PVC Coupler
- 4’’ to 2’’ PVC Reducer
- 2’’ to 1.5’’ PVC Reducer
- 2 x ____ cm of 1.5’’ diameter PVC Schedule 40
- 2 x 1.5’’ PVC Threaded Coupler
- 1.5’’ PVC Ball Valve
- 1.5’’ to 3’’ PVC Reducer
- 3’’ diameter PVC Coupler
- PVC Primer
- PVC Cement
- Real-Tuff PTFE Paste Thread Sealant
- Epoxy Putty
- Heavy Duty Zip Ties
- Wooden Board
- Drill w/ Drill Bit
- French Valve/Presta Valve
- Air Compressor
Procedures for Construction
1. Use drill and appropriate size drill bit to drill a hole in the 4’’ diameter endcap for placement of Presta valve. Ensure valve is firmly secured . Use Epoxy putty to seal and strengthen placement of Presta valve.
2. Use PVC Primer and PVC Cement to attach 4’’ endcap to length of 4’’ diameter PVC pipe.
3. Use PVC Primer and PVC Cement to attach 4’’ Coupler to end of 4’’ diameter PVC pipe.
4. Use PVC Primer and PVC Cement to attach 4’’ to 2’’ Reducer to 4’’ Coupler
5. Use PVC Primer and PVC Cement to attach 2’’ to 1.5’’ Reducer to 4’’ to 2’’ Reducer
6. Use PVC Primer and PVC Cement to attach 1.5’’ PVC pipe to 2’’ to 1.5’’ Reducer
7. Use PVC Primer and PVC Cement to attach 1.5’’ Threaded Coupler to 1.5’’ PVC pipe
8. Apply PTFE Paste and PTFE Tape to Threads on 1.5’’ Threaded Coupler. Thread on the 1.5’’ PVC Ball Valve
9. Repeat Step 8 for other end of 1.5’’ PVC Ball Valve
10. Repeat Step 7 for open end of attached 1.5’’ Threaded Coupler
11. Use PVC Primer and PVC Cement to attach 1.5’’ to 3’’ Reducer to 1.5’’ PVC pipe
12. Use PVC Primer and PVC Cement to attach 3’’ Coupler to 1.5’’ to 3’’ Reducer
13. Ensure all connections are flush and firmly attached. Wait for PVC Cement to dry and securely attach
14. Use Air compressor to check enclosed portions of the chamber for air leaks. Use epoxy putty or appropriate sealant, to remove air leaks.
15. Use Drill Bit to drill holes into wooden board. Use heavy duty zip ties to firmly attach pneumatic launcher to wooden board. Add enough zip ties to prevent device from moving during operation.
Side View Front View Birds Eyeview Bottom View
You must provide a detailed and well written description of the launcher. Your writing must be written well enough to incorporate all of the required details above. Polish your writing style and draw upon literary elements to help the reader imagine the launcher design.
3. Calculations of the Engineering Specifications
Below is a graphical representation of the calculations of the engineering of Shinigami.
Though some of the data above was recorded during the launch of Shinigami, the highlighted were calculated using the following formulas:
Formulas
½ Time= t ÷2
Horizontal Velocity = Dx ÷ t
Vertical Initial Velocity = -a(t ½) Using Angle = Vx – tan(45®)
Max Height = Viy × t ½ + ½ a t½2
Resultant Velocity =