- Jan 7, 2019
- Reaction score
When staging BP engines, do the booster and sustained motors need to be abutted or can there be a stuffer tube between them. I ask because I am looking at a design where the booster is more than a booster engine in length (more like 6 inches, details as to why in the eventual build thread). The concern is igniting the sustainer, I can design it with a stuffer tube that is fire resistant and/or replaceable if it gets damaged over time.