A Class Rocket Motor

Estes 1/2A3

Estes Industries
black powder
Ø 13mm
Total Impulse
1.1Ns
Burn Time
0.36s
Avg Thrust
3.0N
Max Thrust
7.6N

Thrust Profile (N)

0.36s Burn Window

Engineered by Estes Industries, the 1/2A3 is a 13mm solid rocket motor designed for model rocketry. As an official A-class motor, it delivers a total impulse of 1.1 Ns over a 0.36 second burn window.

With an average thrust of 3.0 N and a peak of 7.6 N, it features a neutral thrust curve optimal for heavy rockets requiring high off-the-pad acceleration. It utilizes the black powder propellant formulation, dictating its specific impulse and exhaust signature.

Technical Specifications

National Association of Rocketry
Diameter 13 mm
Length 45 mm
Hardware Single Use
Delays (s) 2,4
Specific Impulse 55.6 s
Peak Thrust 7.62 N
Peak Time T+ 0.126s
T/W Ratio 46.8
Propellant black powder
Profile neutral
Type SU
Sparky No

Mass Budget

6.6g Total
Casing (Dry)
4.6g
69.7%
Propellant
2.0g
30.3%
Live Sizing
Flight Envelope

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