Quest Q-Jet B4-4FJ Black Max Complete 2-Motor Launch Pack

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Quest Q-Jets are the world's most advanced 18mm model rocket motors. Q-Jet&trade high performance, composite propellant model rocket motors use the same family of solid propellant as NASA’s Space Shuttle Boosters, military missiles, sounding rockets, and NASA’s future SLS moon rocket. They utilize a patent pending high-strength polymer case and bulkhead, ceramic nozzle and RCSs exclusive Black Max&trade aerospace grade composite propellant formulation, which produces nearly double the specific impulse (or ISP, a propellant efficiency rating) of conventional black powder propellant. They are not susceptible to thermal cycling like black powder motors. Q-Jet&trade rocket motors deliver faster lift-offs, visible exhaust plume, denser dark tracking smoke & increased reliability at lift-off.


This Q-Jet&trade 2-Motor Launch Pack comes complete with FirstFire&trade Micro Initiators and bright orange Parachute Recovery Wadding. All Q-Jet&trade motors are U.S. mailable with no hazmat fee!

Certified by the Tripoli Rocketry Association (TRA), the National Association of Rocketry (NAR) and the Canadian Association of Rocketry (CAR).



  • Motor Diameter: 0.71 inches (18mm)
  • Casing Length: 2.75 inches (70mm)
  • Total Impulse: 4.9 N-sec
  • Average Thrust: 4.4 newtons
  • Peak Thrust: 7.0 N-sec
  • Thrust Duration: 1.10 seconds
  • Delay Time: 4 seconds
  • Propellant Weight: 3.6 grams
  • Motor Weight: 19.8 grams
  • Maximum Liftoff Weight: 85 grams


Used with permission, copyright ©2023 AeroTech/Quest Division, RCS Rocket Motor Components, Inc. Copyright ©2023 Brey Corp. t/a Hobby Works.®



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