This Model Rocket Motor Reload Kit Contains One Reloadable Motor System (RMS) 24/40 Motor Hardware Designed by Aerotech. Federal Law Prohibits the Sale of This Product to Persons Under Age 18.

Aerotech 24mm RMS MOTOR
 Aerotech # aro91241
Retail $59.99  SAVE 21% !
Aerotech Item # aro91241
Specifications :
  • Motor Diameter: 0.94" (24mm)
  • Motor Length: 2.75" (70mm)
  • Assembled Weight: 1.6oz - 2.4oz (45g - 67g)
  • Aerotech Product Number: 91241
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Spotlight Review

"Good investment"
Great motor case that can save you a few bucks on the F reloads in hazmat fees, and I love the E18 and E28 loads for this case. This is my primary E/F casing, with the 29 40-120 being almost exclusively used for G motors or maybe the F52 if I don't want a heavier model to go too high due to wind etc.

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  • For use with RMS 24mm D, E, F reloads.
  • The RMS 24/40 motor hardware can be used with Aerotech's D9, D15, E11, E18, E28, F12, F24, and F39 rocket motor reloads kits.
  • Primary use in single stage rockets.
  • They deliver power at the lowest per flight cost available in hobby rocketry.
  • RMS motors produce far less non-biodegradable waste than single-use motors.
  • Reflects the same reliablity, quality, and professional design.
  • Assembly and operation instructions provided.
  • Product warranty policies included.


  • Motor Diameter: 0.94" (24mm)
  • Motor Length: 2.75" (70mm)
  • Assembled Weight: 1.6oz - 2.4oz (45g - 67g)
  • Aerotech Product Number: 91241


  • 24mm Aft Closure
  • 24mm Case
  • 24mm Forward Closure
  • Grease

Requirements & Suggestions

  • Motor Reload Kit (Refer to FEATURES)
  • How To Build a Model Rocket
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"Awesome product i love"
Great starter re loadable engine kit. I have several flawless flights with this motor tube and have used it not only for personal use but also as a training tool for others in the 4-H rocketry program. I am very pleased with the quality and workmanship involved in the making of this motor system. PRO'S easy to reload easy to clean well written instructions. CON'S Lots of small parts involved so not for younger children

"Send your Estes rocket into the Stratosphere!"
skydog (Arizona)
Want your rocket to fly higher and faster than the designer intended? Want to save money at the same time? Want to get more involved in the prepping of your rocket so you can be even happier when your hard work pays off and you have a perfect flight?? Sure you do! Rocketry is all about adventure and learning- Doing something that might be a little difficult and doing it well. Get an F reload into this case, cram it up the tailpipe of that lightweight Estes D kit, and watch it really perform! Just make sure you at least have an idea of the correct delay- Obviously it should be longer than you would use with a D motor. If your rocket flies well on a D12-5, for instance, DON'T put an F24-4 in it. Work your way up from what you know... Ds, then Es, then Fs, and keep notes. And read and follow instructions exactly until you know what you're doing.

"Changed rocketry for me!"
When I first got back into rocketry I purchased the 24/40 case from HobbyLinc. Having only launched on Estes BP motors I was amazed at the difference that a good composite motor system makes. I've been able to launch much heavier rockets safely and to higher altitudes than I ever though possible with BP. At first I was anxious about the reloading process having heard stories of destroyed rockets due to improperly assembled motors but after the first flight all my concerns were laid to rest. The motors are easy and quick to assemble and I often reload the casing multiple times at club launches. Some rubber gloves and baby wipes help a lot when reloading at the range. The difficulty of cleaning cases seems to be a bit overstated by some. I've never used more than simple green and water and mine come out sparkling clean each time. (I've even run them through the dishwasher when the wife isn't home.) Every person who launches model rockets should be using these casings. Its cheaper in the long run and allows you to launch bigger rockets or get more height out of smaller ones. The best part is the better selection of motors and the ability to purchase reloads for some motors without having to pay the hazmat fee associated with prebuilts.


  • This reload kit is intended to be used only with AeroTech Reloadable Motor System Kits.
  • Read and follow the safety codes of the National Association of Rocketry (NAR) and the Tripoli Rocketry Association and comply with all federal, state and local laws in all activities with hobby rockets.
  • Damaged or defective reloads should be returned to Aerotech.

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