Our new RMS Reloadable Motor System J615ST-20A rocket motor reload kit (No. 106120) is the first high-power hobby rocket motor featuring an “Aerospike” nozzle and designed to use the two-grain RMS-54/852 hardware.
Our Aerospike nozzle provides an especially cool "I flew one” experience for our high-power flyers. Theoretically, an Aerospike nozzle expands the rocket motor exhaust gases around a center body rather than internally in the exit cone of a conventional nozzle. Aerospike nozzles have the advantage of being self-adjusting to the rocket’s ambient pressure in flight and therefore can be more efficient than a traditional fixed-expansion ratio nozzle when used at a wide range of altitudes. In consumer applications, however, the Aerospike nozzle is utilized more for its unique appearance and novelty rather than for performance reasons. Our Aerospike nozzle does produce a rather novel exhaust plume.
The J615ST-20A has a high-thrust profile for heavy rockets delivering 745.5 N-Sec (167.6 lb.-Sec.) of total impulse with a 1.2 second burn time and an all-up weight in motor hardware of 1.8 lb. (801.7 g). This new rocket motor utilizes AeroTech’s aerospace-grade Super Thunder (ST) propellant formulation with a burn rate midway between Blue ThunderTM and Warp-9TM propellant types. The J615ST-20A generates a peak thrust of 933.9 N (209.7 lb.) with an average thrust of 615.1 N (138.3 lb.). The J615ST-20A includes an ejection charge and produces tracking smoke via a 20 second time delay adjustable to increments of 18, 16, 14 and 12 seconds.
The AeroTech motor reload kit comes with 1 rocket motor reload. Reload kits include all internal motor components and FirstFire™ Initiators. Requires HAZMAT shipping via UPS or FEDEX. The sale of this high power motor to persons under 18 years of age is currently prohibited by federal law. This is a High-Power motor requiring Level 2 High-Power certification through NAR or Tripoli to purchase. Orders containing this item will not be shipped until proof of age (such as a copy of a driver’s license) and proof of Level 2 certification is received.
Certified by the Tripoli Rocketry Association (TRA), the National Association of Rocketry (NAR) and the Canadian Association of Rocketry (CAR).
Motor Diameter: 2.13 inches (54mm)
Casing Length: 9.5 inches (240.4mm)
Hardware Required: RMS-54/852
Total Impulse: 745.5 N-sec
Peak Thrust: 933.9 N
Delay Time: 20 Seconds - adjustable to 18, 16, 14 and 12 seconds
Propellant Weight: 370.5 grams
Motor Weight: 801.7 grams
Maximum Liftoff Weight: Due to the variables involved, AeroTech/Quest currently does not list or post recommended maximum lift-off weights for their mid-power and high-power rocket motors. Instead, we recommend utilizing either the RockSim software available at www.apogeerockets.com or OpenRocket Simulator available at www.openrocket.info.