Quest Q-jet

Quest Q-Jet™ B4-4FJ Black Max Complete 2-Motor Launch Pack - Q6112

Quest Q-Jet™ B4-4FJ Black Max Complete 2-Motor Launch Pack - Q6112 - Main image
$8.24 $12.49 In stock

Quest Q-Jets are the world's most advanced 18mm model rocket motors. Q-Jet™ 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™ 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™ rocket motors deliver faster lift-offs, visible exhaust plume, denser dark tracking smoke & increased reliability at lift-off.

This Q-Jet™ 2-Motor Launch Pack comes complete with FirstFire™ Micro Initiators and bright orange Parachute Recovery Wadding. All Q-Jet™ 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).

  • Specifications:

    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

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 4 reviews)

Alexander M. ★★★★★

First time using composite motors this small and the difference in reliability over old black powder ones is night and day. Even in a light breeze, the B4 boost was straight and the ejection charge fired right at apogee, just like the product description promised.

Joseph E. ★★★★★

These little motors punch way above their weight for an 18mm size, and the two-pack means I didn't have to stop mid-launch day. The composite propellant lit instantly and gave a crisp, straight boost that made me grin every time.

William Q. ★★★★★

The composite propellant in these Q-Jet motors gave my rocket a noticeably smoother, more powerful boost than the standard black powder engines I'm used to. Two motors included means I already have my next launch planned, and the 4-second burn felt just right for a mid-sized rocket.