KevinM
Well-Known Member
- Joined
- Sep 4, 2009
- Messages
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This thread is a continuation of one I started in the Software section looking for some guidance with OpenRocket. Original thread was started here, but it seems a little misplaced to be posting photos and flight reports there...
Thanks again to Buckeye for confirming how to handle the net reduced impulse from my canted thrust lines. I successfully modified the thrust profile of the D12 "flight motors" and simmed an apogee of 285 m, and more importantly the need for a 6 second delay time.
Good weather was with us today so I've also got a first flight report to make. But before we get to that, I took some obligatory "pre-flight" photos just in case something went ugly:
And one last one with the proud designer:
Despite the snow falling we had a warm (ish) day with negligible winds - perfect for a first flight. Motor config for flight one was a D13-7W (drilled back by 2 sec) to boost off the pad, and a pair of D12-0 "flight" motors on a 0.5 second air start delay. I lucked out with my camera today, and the overcast sky turned out to be really good for being able to see the flight motors burning:
JL A3 says I hit 278 m, which is close enough to what OR predicted to keep me happy.
Post flight revealed some light singing of the horizontal surfaces in the flight-motor blast, but nothing that can't be dealt with.
Now, on to painting!
Thanks again to Buckeye for confirming how to handle the net reduced impulse from my canted thrust lines. I successfully modified the thrust profile of the D12 "flight motors" and simmed an apogee of 285 m, and more importantly the need for a 6 second delay time.
Good weather was with us today so I've also got a first flight report to make. But before we get to that, I took some obligatory "pre-flight" photos just in case something went ugly:
And one last one with the proud designer:
Despite the snow falling we had a warm (ish) day with negligible winds - perfect for a first flight. Motor config for flight one was a D13-7W (drilled back by 2 sec) to boost off the pad, and a pair of D12-0 "flight" motors on a 0.5 second air start delay. I lucked out with my camera today, and the overcast sky turned out to be really good for being able to see the flight motors burning:
JL A3 says I hit 278 m, which is close enough to what OR predicted to keep me happy.
Post flight revealed some light singing of the horizontal surfaces in the flight-motor blast, but nothing that can't be dealt with.
Now, on to painting!