G38-7FJ Fast Black Jack Single Use Motor (1)

This Package Contains One G-class G38-7FJ Composite Model Rocket Engine from Aerotech. For use with single stage rockets, this Fast Black Jack engine generates a dense black smoke stream.

Aerotech G38-7FJ Fast Black Jack Single Use Motor (1) G Composite Model Rocket Engine #73807
 Aerotech # aro73807
Retail $32.99  SAVE 21% !
Aerotech Item # aro73807
Specifications :
  • Aerotech Product Number: 73807
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Spotlight Review

"My first mid powered launch"
My first mid powered launch with the hv arcas, powered by a fast black jack was great. The black smoke trail It left behind made it look like a real jet engine. I. can’t wait to try the different types of composite motors aerotech has to choose from.

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  • Used with single stage rockets.
  • The "FJ" stands for Fast Black Jack.
  • Primary use is for single stage rockets.
  • Propellant effect is a dense, sooty black smoke.
  • Burn time for this motor is 2.2 seconds.
  • The average thrust of the motor is 8.5 pounds (38 Newtons); however, can peak at 17.5 pounds (78 Newtons).
  • They each have a delay of 7 seconds.
  • Compact motor comes with directions and performance specifications.
  • Contains one 4-1/4" long copperhead igniter and elastic band.


  • Aerotech Product Number: 73807


One G38-7FJ BlackMax Econojet Model Rocket Motor

Requirements & Suggestions

Copperhead Igniter Installation

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  • Motor is very hot after firing.
  • Store in a dry place where the temperature is between 45 degrees (F) and 100 degrees (F).
  • See directions for proper disposal method.
  • Federal Law Prohibits Sales to Persons Under 18 Years of Age.

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