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B4-6 Q-Jet Model Rocket Engine


Retail Price: $10.99
ASP Price: $8.99 each
You Save $2.00!
  2+: 7.99 each
  3+: 6.99 each


2 pack of B4-6 Q-Jet™ model rocket engines. Includes igniters. 18mm size designed to fit a standard T-20 size tube/engine mount (same size as standard Estes A thru C engines).

Note: we can only ship this item by ground to the Continental US.

A few states have age restrictions to purchase model rocket engines, click here for more info.

From the manufacturer:

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 igniter, 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)
Total Impulse: 5.0 N-sec
Burn Time: 1.10 seconds
Average Thrust: 4 newtons
Delay Time: 6 seconds
Propellant Weight: 3.6 grams
Motor Weight: 19.8 grams