A3-6 (2-pack) Model Rocket Motors

A3-6 (2-pack) Model Rocket Motors

Quest Rockets

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A3-6 Q-Jet 2-pack 18mm model rocket motors. Includes initiators and wadding.

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 propellant. They are not susceptible to thermal cycling like black powder motors. Q-Jets generate a highly-visible exhaust plume and delay smoke trail. All Q-Jets ship with a FirstFire Micro 2-lead initiators, which can be used with any launch controller. All Q-Jet motors are U.S. mailable with no hazmat fee!


  • Motor Diameter: 0.703" (18mm)
  • Casing Length: 2.75" (70mm)
  • Propellant Weight: 2.1 grams
  • Motor Weight: 17.9 grams
  • Maximum Liftoff Weight: 28 grams

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