mperegrinefalcon
Well-Known Member
- Joined
- Jun 12, 2017
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So I just got finsim so I could check to see if my 2.6" Screeches fins would disintegrate if I flew it on an L935, and these are the numbers it came up with. It's my first time using finsim, and I don't really know what I'm looking at. It's really surprisingly low velocities that fin flutter sets in, but the thing is I've seen videos of this rocket flying, and there is no flutter way past what finsim is saying is the maximum velocity. Heck, I'm pretty sure I've flown it faster then what finsim is saying for the flutter speed and divergence speed. I put it up on a J500, and the sim was within 500 feet of its altitude. I haven't been able to get the flight data off the RRC3 yet, but I'm sure it was close to about the mach 0.7 predicted by Openrocket. Here is the data: