Enerjet by AeroTech F67-4W 2 馬達包 - 66704

The F67-4W motors ignited cleanly and the delay was spot on for a 3-second eject at apogee. My rocket arced perfectly and the chute deployed right as it tipped over. Composite propellant really does burn smoother than the black powder stuff I used before.

Flew a pair of these on a windy Saturday and the 4-second delay popped the chute right at apogee both times, no shredding. The composite fuel burns steady and clean, and the two-pack means I didn't have to reorder for my next launch day.

These motors lit with a clean, immediate burn every single time, and the ejection charge on the 4-second delay felt perfectly timed for my rocket’s weight. I’ve flown both in one afternoon and the composite propellant gave noticeably smoother thrust than the black powder motors I’m used to. For the