B Class Rocket Motor

Klima B4

Raketenmodellbau Klima
composite
Ø 18mm
Total Impulse
5.0Ns
Burn Time
1.20s
Avg Thrust
4.0N
Max Thrust
8.0N

Thrust Profile (N)

1.20s Burn Window

Engineered by Raketenmodellbau Klima, the B4 is a 18mm solid rocket motor designed for model rocketry. As an official B-class motor, it delivers a total impulse of 5.0 Ns over a 1.20 second burn window.

With an average thrust of 4.0 N and a peak of 8.0 N, it features a neutral thrust curve optimal for general sport flying. It utilizes the composite propellant formulation, dictating its specific impulse and exhaust signature.

Technical Specifications

Uncertified
Diameter 18 mm
Length 70 mm
Hardware Single Use
Delays (s) 0,4,P
Specific Impulse 94.4 s
Peak Thrust 8 N
Peak Time T+ 0.411s
T/W Ratio 25.02
Propellant composite
Profile neutral
Type SU
Sparky No

Mass Budget

16.299999999999997g Total
Casing (Dry)
10.9g
66.9%
Propellant
5.4g
33.1%
Live Sizing
Flight Envelope

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Comparable B-Class Alternatives

B4-4

Quest

B
neutral
Total: 4 Ns
Ø 18mm

B6

Estes

B
neutral
Total: 4 Ns
Ø 18mm

B6

Quest

B
regressive
Total: 5 Ns
Ø 18mm

B2

Apogee

B
regressive
Total: 5 Ns
Ø 10.5mm

SCR-B6

SCR

B
regressive
Total: 5 Ns
Ø 18mm

B4

Quest

B
dual-peak
Total: 5 Ns
Ø 18mm
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