Micro-hybrid rocket motor (D power class) - complete hardware $99
Mini-hybrid rocket motor (E power class) - complete hardware $125
Mini-max bi-hybrid (D boost to E sustainer) prototype motor beta (level 2 certification required to participate in beta tests) $120
Lightweight casing (33% lighter for the micro, 28% lighter for the mini) add $12
A note on lightweight casings…micro and mini-hybrid motors are heavy for their power class because of a number of reasons not the least of which is the steel nitrous cartridge. In an attempt to obtain the best flight performance out of these motors I offer this lightweight case option. The tradeoff is robustness as these lightweight cased motors operate near temperature and pressure design limits; therefore all things must go right, and the tolerance for error is minimal. If you are just starting out with these motors I suggest purchasing an extra standard weight casing when you order a lightweight motor. Perform all your tests (static and flight) with the standard weight case and then fly your performance flights with the lightweight case!
Extra external snap-ring groove add $5
This groove is placed a half inch above the standard external snap-ring groove and is useful in the specialized cases of certain two-stage flights or piston launches. In both of these cases another body tube will be slipped over the rear end of the motor and the extra half inch of motor case below the second snap-ring allows for this. Note that there is a slight probability of increased case burn through compromise by adding this second groove.
Extra thick injector housing floor no additional cost
Some nitrous cartridges are difficult to puncture (Quick Whip 9 gram cartridges for example). A thicker injector housing floor will help but will make ignition a bit more difficult. If you plan on routinely using such cartridges you can specify this extra thick floor with your order. However, if your standard floor injector housing fails because of this problem it is covered at no cost under warranty.
Each motor is precision "hand"-machined from aluminum, brass, stainless steel and graphite. The motor is supplied with a copy of an extensive user's manual (also available as a stand-alone product) including background and history, assembly and launch instructions, performance data, resource lists and more.
Dexter Labs small hybrid family (left to right): Micro-hybrid, Mini-hybrid, Stretch Mini-hybrid, Mini-max Bi-hybrid, Turbo APCP Bi-hybrid.