qquake2k
Captain Low-N-Slow
- Joined
- Jan 26, 2010
- Messages
- 13,574
- Reaction score
- 65
I'm playing around with a design for an upscale Big Betty, based on LOC 5.54" airframe. It will have a 38mm motor mount, and the biggest motor I would ever consider putting in it is an AT J575. I was initially planning on using 3/8" birch plywood for the fins, but got to thinking, would 1/4" be strong enough? Max velocity on the J575 sims at 510fps (0.46 mach), so I don't think flutter would be a problem with 1/4" fins. My biggest concern would be breaking a fin. There's a lot of unsupported fin hanging down. What do you guys think?
View attachment Whale Betty v3.ork
View attachment Whale Betty v3 quarter.ork
View attachment Whale Betty v3.ork
View attachment Whale Betty v3 quarter.ork