AeroTech 6121 Q-Jet Black Max Composite Model Rocket Motor - D16-6FJ 2 Pack (Ships USPS Ground) Brushed -27T (1) left aluminum axle carrier

(1) left aluminum axle carrier with

paned windows

Athearn Genesis G89967 HO Scale Trinity 3 Bay Covered Hopper Union Pacific CMO 21275

Offset front output for offset front axle configuration

AeroTech 6121 Q-Jet Black Max Composite Model Rocket Motor - D16-6FJ 2 Pack (Ships USPS Ground) Brushed -27T (1) left aluminum axle carrierAeroTech 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