View Single Post
Old 11-09-2017, 08:00 AM
astronwolf astronwolf is offline
Master Modeler
Join Date: Mar 2013
Location: Northeast Ohio
Posts: 582

Back in the day, they needed something to distinguish model rocket motors from fire crackers. IMHO, we still do today. So we enjoy the benefit of having a certification process.
-Wolfram v. Kiparski
NAR 28643
TRA 15520
MTMA Senior Advisor
Reply With Quote