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1/2A3-4T Model Rocket Engines (4) -- Mini Rocket Motor -- #1504

Estes Rockets 1/2A3-4T Model Rocket Engines (4) -- Mini Rocket Motor -- #1504
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50 Stars (7)
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Product Number:EST1504
Shipping:USA Only
3rd Class Ground
Product Description

This is a 1/2A-class 1/2A3-4T single use mini model rocket engine from Estes. For use in single stage model rockets.

Product Features
  • "Mini" class model rocket engine 4 pack.
  • Single stage model rocket motor.
  • Detailed instructions.
  • Easy to use.
  • National Association of Rocketry certified.
Product Specifications
  • Length: 1 3/4"
  • Diameter: 1/2"
  • Estes Product Number: 1504
What's Included
Requirements & Suggestions
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Sandpaper
Sandpaper
Product Rankings
#4 in Home > Model Rockets  >  Rocket Engines  >  Mini Size
#42 in Home > Model Rockets  >  Rocket Engines
#118 in Home > Model Rockets
Most Helpful Reviews - View All - Write a Review
Great Kid Friendly Motor
By jamiekitchen June 18, 2013
At first blush it may seem uneconomical to buy a 1/2A motor given that I am usually stuffing something a lot bigger in my rockets, but I really love these little motors. One of the key elements to their disproportionate performace is their weight. An 18 mm 'A' motor is the same size as a 'C' motor which holds 4 times the propellant. The 13 mm motor case for the mini-size motors are there fore much less than 1/2 the weight of their bigger bretheren. In large rockets, this may not make a big difference in the overall launch wheight, but in small 13mm and 18mm rockets with balsa nosecones and fins, the motor makes up a much larger percentage of the rocket launch weight. This little motor will send my 18mm scratch built as high as a full 18mm A' motor will. In mimimum size 13mm rockets, which are really fun to build, this motor will send them almost out of sight. I always make sure I have plenty of mini motors on hand in both this and full A sizes. They are very economical and a good way to teach small hands how to install and prepare motors in small rockets that stay within eye shot for easy recovery.
Was this review helpful to you? 14 of 14 people liked this
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Manufacturer Comments
  • WARNING: Model rocket motors are flammable. Please use caution.
  • Must be 14 to purchase in CA and NJ.
  • Do not burn engines.
  • Soak in water to destroy.
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