Sunday, 10/6/2013. 3:00pm EST. East Hill Plaza, Ithaca, NY.
I ran a MATLAB simulation and came up with these results:
__Input:__ Cd(Coefficient of Drag): 0.75 = 0.75 Parachute Diameter: 12 [in] = 0.305 [m] wind speed: 22 [ft/s] = 6.7056 [m/s]
__Output:__ vxfinal: 22 [ft/s] = 6.7056 [m/s] vyfinal: 15.6022 [ft/s] = 4.75 [m/s] Kinetic Energy at impact: 0.56477 [ft*lbf] = 0.766 [J] Max Force: 0 [lbf] at 500 [ft] = 0 N
Cornell Rocketry has light weight parachute that is 12[in] diameter.
Element | Weight |
---|---|
Mylar Balloon | 1g |
Parachute & rigging | 2g |
Nichrome and lead wire | 5g (est) |
Radio | 35g (Case partially removed) |
AA Batteries | 37g |
CR2032 Battery | 3g |
Microcontroller board | 20g |
Waterproof packaging | 10g (est) |
Total | 113g |
set_timer(1 hour); while(true) { transmitter on; send_morse("W2CXM/BALLOON"); send_tone(10); send_dead_air(10); transmitter off; sleep(30); }
Element | Cost |
---|---|
Mylar Balloon(s) & gas | $15 |
Parachute | $5 |
String | $0 |
Nichrome and lead wire | $6 |
Radio | $20 |
Battery | $20 |
Microcontroller board & components | $20 |
Waterproof packaging | $0 |
Total | $86 |