C Class Rocket Motor

Estes C11

Estes Industries
black powder
Ø 24mm
Total Impulse
8.8Ns
Burn Time
0.81s
Avg Thrust
10.9N
Max Thrust
21.7N

Thrust Profile (N)

0.81s Burn Window

Engineered by Estes Industries, the C11 is a 24mm solid rocket motor designed for model rocketry. As an official C-class motor, it delivers a total impulse of 8.8 Ns over a 0.81 second burn window.

With an average thrust of 10.9 N and a peak of 21.7 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 24 mm
Length 70 mm
Hardware Single Use
Delays (s) 0,3,5,7
Specific Impulse 74.8 s
Peak Thrust 21.73 N
Peak Time T+ 0.298s
T/W Ratio 31.42
Propellant black powder
Profile neutral
Type SU
Sparky No

Mass Budget

35.23g Total
Casing (Dry)
23.2g
65.9%
Propellant
12.0g
34.1%
Live Sizing
Flight Envelope

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Comparable C-Class Alternatives

C5

Estes

C
neutral
Total: 8 Ns
Ø 18mm

C6

Quest

C
neutral
Total: 9 Ns
Ø 18mm

C6

Estes

C
regressive
Total: 9 Ns
Ø 18mm

SCR-C6

SCR

C
regressive
Total: 9 Ns
Ø 18mm

C4

Apogee

C
regressive
Total: 9 Ns
Ø 18mm

C3.4T

AeroTech

C
regressive
Total: 9 Ns
Ø 18mm
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