08-04-2014, 07:33 PM
|
|
BAR
|
|
Join Date: Nov 2005
Location: WI
Posts: 1,852
|
|
Quote:
|
Originally Posted by ghrocketman
Wow.
A 29mm F15 in a Cherokee-D.
Wonder if it goes any higher than one powered by an Aerotech E15/E30 as the motor weighs a lot more and so would the rocket due to all the clay in the nose. I'm thinking all that weight would offset the extra ~10n-sec of total impulse the F15 has over the E15/E30.
I always have at least one 18" Cherokee-D in my fleet.
The last one that I LOST was on either an E9-6 or E9-8. Winds were very low at ground level but were NOT at apogee ejection height.
A 12" chute was way too much for the winds up at around 2500'...should have used a long streamer instead. I think I lost that one in like 2007 or 2008.
|
Not much higher - A quick 'n dirty sim, ignoring the lack of ideal delay times, says:
1160' for a D12
1780' for an E9
2120' for an E30
2340' for an E15
2470' for an F15 (with the additional 2 oz nose weight)
YMMV. I have no idea how high it actually went, other than out-o-sight. The long burn, though, is great fun! I was lucky to recover it after the first flight, and don't expect to next time...
__________________
Paul
If we weren't all crazy, we would go insane - Jimmy Buffett
NAR #87246 www.wooshrocketry.org
|