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 > Model Rockets > Rocket Engines > Reloadable : Aerotech E18-4W Reload Kit 24/40 (3) aro51804

E18-4W Reload Kit 24/40 (3)

This Model Rocket Motor Reload Kit Includes Three E-class E18-4W Reloadable Motor Systems for RMS 24/40 Motor Hardware, Designed by Aerotech. Federal Law Prohibits the Sale of This Product to Persons Under Age 18. Package contains 3 AeroTech E Engines.

Aerotech E18-4W Reload Kit 24/40 (3) E Reloadable Model Rocket Engine #51804
 Aerotech # aro51804
Retail $14.95  SAVE 21% !
Aerotech Item # aro51804
Specifications :
  • Motor Diameter: 0.94" (24mm)
  • Assembled Weight: 2.0oz (57g)
  • Maximum Liftoff Weight: 16oz (454g)
  • Total Impulse: 40 Newtons
  • Aerotech Product Number: 51804
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Spotlight Review

"Great go to Motor Size"
cthomason (Kerrville, Texas)
This E class reload is a great go to if you are looking to get that extra power into some of your Estes kits. The reloads go together easily although it is important to follow the instructions closely. The reloads and casing prices on HobbyLinc are the best I have found. If you use this reload in your Estes kits designed for E class motors you will need to use the spacer provided with your rocket kit b/c this motor is actually D size.

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  • For use in RMS 24mm D, E, F motor.
  • Primary use in single stage rockets.
  • They deliver power at the lowest per flight cost available in hobby rocketry.
  • White Lightning looks and sounds like actual sounding rockets and launch vehicles.
  • White Lightning propellant formulation: a brilliant white flame, dense bright white exhaust, and a throaty roar.
  • Easy to track and exciting to watch!
  • The average thrust of the motor is 4.1 pounds (18 Newtons).
  • Time delay of 4 seconds between propellant burnout and the firing of the ejection charge.
  • Uses the exclusive Copperhead single lead igniter.
  • Ignites by electrical means only.
  • Certified by the National Association of Rocketry.
  • This reload kit includes (3 of each)
  • -Liner (7/8" O.D. tube)
  • -Propellant Grain (long slotted part)
  • -Grain Adaptor (25/32" O.D. Tube)
  • -Delay Grain (short solid part)
  • -Delay Spacer (9/16" O.D. Washer, O-ring or tube)
  • -Delay Insulator (5/8" O.D. tube)
  • -Outer Delay O-Ring (1/16" thick x 5/8" O.D.)
  • -Inner Delay O-Ring (1/16" thick x 1/2" O.D.)
  • -Forward Insulator (7/8" O.D. Washer)
  • -Aft O-Ring (3/32" thick x 7/8" O.D.).
  • -Forward O-Ring (1/16" thick x 7/8" O.D.)
  • -Nozzle (black plastic part).
  • -Copperhead Igniter
  • -Ejection Charge Container/Nozzle Cap (Red)
  • Assembly and operation instructions provided.
  • Product warranty policies included.


  • Motor Diameter: 0.94" (24mm)
  • Assembled Weight: 2.0oz (57g)
  • Maximum Liftoff Weight: 16oz (454g)
  • Total Impulse: 40 Newtons
  • Aerotech Product Number: 51804


3-Pak Package of E18-4W Reloadable Motor Systems

Requirements & Suggestions

  • RMS 24/40 Motor(s)
  • 12V Launch System
  • Wet Wipes or Damp Paper Towel
  • Hobby Knife (tes50627c) or Scissors
  • Masking Tape
  • Assembly
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Write a Review  View All Reviews
"Good motor"
This motor hits hard when lift off. It has a nice white flame and put my estes Maniac out of site! The altimeter read 3320 feet!

"A FANTASTIC motor option for 24mm rockets"
The Aerotech E18 motors are a fantastic option for your 24mm rockets which use a standard Estes D sized motor if you are looking for some extra oomph for your launch - especially for those rockets that only support the Estes D12-sized motors (as opposed to the longer E-sized motors) The price on these reloads is fantastic at HobbyLinc. The assembly of the reloads is pretty simple once you have done it a few times. You can break even on the cost of a case after a dozen launches or so but that is secondary to the options that open up with these motors. For example: An Estes Saturn-V only fits a D-12 sized motor and you get a pretty low (and scary flight!) with that motor. With the Aerotech 24/40 case you can use these E18 motors and get your Saturn up a couple hundred feet with a fantastic noisy, white smoke trail that is just fantastic. Furthermore, a number of the larger Estes LPR rockets that can handle the E motors (Black Star Voyager, QCC Explorer, V2 to name a few) are really fun with the E18 motor in it as an alternative to the Estes E9/12 black powder motors. I highly recommend these as a fun addition to the black powder E class motors you may have in your range box.

"E class"
georgerseijo (Davie, FL)
e power in d size package and 3 pack is better than D12 2packs


  • This reload kit is intended to be used only with AeroTech Reloadable System (RMS) hardware.
  • 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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