Just wondering if many people do it by design. I was sort of forced into it when I bought an old NCR Phantom 4000. It has one motor mount tube that is a hair too small for a 29mm reload case or single use composite motor. The only 29mm motors I found that would fit are Estes black powder. But a single F15 would not have enough thrust to get it off the pad. So I added two 24mm external motor pods. It flies great with an F15-4 and two E12-4s. But, since the total propellant weight is over 125 grams, it qualifies as high power.
The BP initial high thrust peak followed by a lower sustained thrust give it a slow, scale-like climb.
Show us your BPHP rockets!
The BP initial high thrust peak followed by a lower sustained thrust give it a slow, scale-like climb.
Show us your BPHP rockets!