Quest Q-Jet Composite Model Rocket Engines
New composite model rocket engines from Quest. The 18mm are the same size as standard A - C Estes engines and will fit models designed to use the Estes engines. The 24mm motors are the same size as an Estes D12 and also fit models designed to use the Estes 24mm engines.
From the manufacturer: "The Q-Jets are the world's most advanced model rocket motors. They utilize a patent pending high-strength polymer case and bulkhead, ceramic nozzle and our exclusive Black Max™ or White Lightning™ 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!"