E Class Rocket Motor

Estes E9

Estes Industries
black powder
Ø 24mm
Total Impulse
27.9Ns
Burn Time
3.09s
Avg Thrust
9.0N
Max Thrust
19.5N

Thrust Profile (N)

3.09s Burn Window

Engineered by Estes Industries, the E9 is a 24mm solid rocket motor designed for model rocketry. As an official E-class motor, it delivers a total impulse of 27.9 Ns over a 3.09 second burn window.

With an average thrust of 9.0 N and a peak of 19.5 N, it features a regressive 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 24 mm
Length 95 mm
Hardware Single Use
Delays (s) 4,6,8
Specific Impulse 79.4 s
Peak Thrust 18.43 N
Peak Time T+ 0.273s
T/W Ratio 15.85
Propellant black powder
Profile regressive
Type SU
Sparky No

Mass Budget

58g Total
Casing (Dry)
22.2g
38.3%
Propellant
35.8g
61.7%
Live Sizing
Flight Envelope

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Comparable E-Class Alternatives

24E22-13A

Cesaroni

E
dual-peak
Total: 24 Ns
Ø 24mm

25E75-17A

Cesaroni

E
dual-peak
Total: 25 Ns
Ø 24mm

26E31-15A

Cesaroni

E
regressive
Total: 26 Ns
Ø 24mm

E12

Estes

E
regressive
Total: 27 Ns
Ø 24mm

E26W

AeroTech

E
dual-peak
Total: 28 Ns
Ø 24mm

E7-RCT

AeroTech

E
regressive
Total: 29 Ns
Ø 24mm
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