
Projectile Hang Times
- schmanman
- Staff Sergeant 2
- Posts: 1685
- Joined: Sat Mar 25, 2006 12:28 pm
- Location: Michigan,U.S.A
- Contact:
unless you took your cannon up in a skydiving plane, then went to the maximum altitude possible in that plane, then shot the gun straight up, and the projectile had a parachute.
. no, I'm kidding, but gort, how do you figure these things out. I mean, I'm a freshman, and am in honors classes, and am taking geometry, so I'm not stupid, but how do you figure these things out?

Persistence is a measure of faith in yourself
- boilingleadbath
- Staff Sergeant 2
- Posts: 1635
- Joined: Sat Mar 12, 2005 10:35 pm
- Location: Pennsylvania, USA
10 minutes up then down = 5 minutes up.
5 minutes = 300 seconds
300 seconds * 32 f/s/s = 9,600 f/s
9,600/1100 = mach 8.7
That, unless I'm ignoring some possibility, is (roughly) the lowest velocity that can give you that hang time.
It assumes a drag-free projectile.
Or, at least, when using a dumb object.
Projectiles with lifting surfaces (wings) or parachutes are a different thing altogether.
5 minutes = 300 seconds
300 seconds * 32 f/s/s = 9,600 f/s
9,600/1100 = mach 8.7
That, unless I'm ignoring some possibility, is (roughly) the lowest velocity that can give you that hang time.
It assumes a drag-free projectile.
Or, at least, when using a dumb object.
Projectiles with lifting surfaces (wings) or parachutes are a different thing altogether.
Yeah, what he said.
Thanks BLB, I really didn't feel like typing that stuff out.
There's more that you should really show, but let's hope he accepts your explanation as it is.
Thanks BLB, I really didn't feel like typing that stuff out.

<a href="http://www.launchpotatoes.com"><img src="http://www.launchpotatoes.com/images/up ... 2.PNG"></a>
http://www.LaunchPotatoes.com
http://www.LaunchPotatoes.com