My 4" Goblin with stock birch fins has flown successfully on every 54mm K AeroTech makes, twice on K1100's, no problems. Going up on either the new DM or Propellant X K at ROCStock if they're CA certified by then.
Steve Trammell On Wed, Apr 25, 2012 at 7:45 PM, Kenneth Brown wrote:
It's more a question of what velocity you are expecting. 1/8" G10 fins on a 4" Goblin with a K1100 (54mm) isn't going to fare very well. Mine didn't and it had the stock birch ply fins.If you plan to fly slow, use the 1/8". I would go with the 3/16" myself. You can always find a use for the 1/8" stock later.Ken (AKA, AG6LD) Brown Got my call sign. Amateur Extra on my first try. On Apr 25, 2012, at 5:48 PM, John Howard wrote:I’m building a scratch dual deploy 4” G10 3FNC rocket, and was planning on using 54mm motors. If I used a 75mm MM then I could launch my first L motor up at XPRS in September (and 54mm’s with an adapter). I will be doing slots through the airframe with reinforced filets inside and out and I already have 1/8” G10. Most kits online look like they use 1/8” G10 for 54mm kits, and 3/16” G10 for 75mm/98mm kits. Am I asking for trouble if I use 1/8” G10 fins with a 75mm motor like a Ceseroni L800 or Aerotech L850W? In ROCSIM both look like rocket would be above 1100 ft/sec for about 2.5 seconds ? Or should I just stick with the 54mm??Any input would be appreciated!! Thanks, John Sent from my old iPhone -- ROC-Chat mailing list roc-chat@xxxxxxxxxxxxx //www.freelists.org/list/roc-chat-- ROC-Chat mailing list roc-chat@xxxxxxxxxxxxx //www.freelists.org/list/roc-chat
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