View Single Post
  #3  
Old 02-11-2018, 08:50 PM
Jerry Irvine's Avatar
Jerry Irvine Jerry Irvine is offline
Freeform rocketry advocate.
 
Join Date: Jan 2008
Location: Claremont, CA "The intellectual capitol of the world."-WSJ
Posts: 3,780
Default

I always design kits with a main or host mount larger than "required" so either a single grain load can be used or a cluster. If he says 38mm minimum I suggest BT-70 (approx 54mm) so you can do a short 54mm, a mid-length 38mm, a long 29mm, or 3 24mm, probably over 120ns each.
Reply With Quote