AeroTech 6121 Q-Jet Black Max Composite Model Rocket Motor - D16-6FJ 2 Pack (Ships USPS Ground) Brushed -27T Offset front output for offset

Offset front output for offset front axle configuration

followed by 6902 in June of that year

Active PFC

(1) left aluminum axle carrier with

Mega G+ Race System

AeroTech 6121 Q-Jet Black Max Composite Model Rocket Motor - D16-6FJ 2 Pack (Ships USPS Ground) Brushed -27T Offset front output for offsetAeroTech 6121 Q Jet Black Max Composite Model Rocket Motor D16 6FJ 2 Pack Ships USPS Ground The Q Jets are the world's most advanced 18mm model rocket motors. They utilize a patent pending high strength polymer case and bulkhead, ceramic nozzle and RCSs exclusive Black Max aerospace grade composite propellant formulation, which produces nearly double the specific impulse (or "Isp", a propellant efficiency rating) of conventional black powder