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B4-4 Q-Jet (2-pak)

$8.00

In stock (4 available)

3 customer reviews   Write a review






Product Description

B4-4 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 initiator, which can be used with any launch controller. All Q-Jet motors are U.S. mailable with no hazmat fee!

Specifications:

Motor Diameter: 0.703" (18mm)
Casing Length: 2.75" (70mm)
Total Impulse: 4.9 N-sec
Burn Time: 1.10 seconds
Average Thrust: 4 newtons
Delay Time: 4 seconds
Propellant Weight: 3.6 grams
Motor Weight: 19.8 grams
Maximum Liftoff Weight: 85 grams

Certified by the Tripoli Rocketry Association (TRA)

For RockSim-compatible .rse and .eng files, please visit the link here.

Customer Reviews

  1. Mr.

    Y7c317o4

    Reviewed by ghovjnjv @@VROiX on Sept. 8, 2025, 11:50 a.m. | Permalink

    1 of 1 customer found this useful

  2. Mr.

    dS5iDykj

    Reviewed by anonymous on Sept. 19, 2025, 6:47 a.m. | Permalink

    This review has no votes.

  3. Mr.

    bVCkTudg

    Reviewed by anonymous on Sept. 30, 2025, 12:31 a.m. | Permalink

    This review has no votes.

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