K Class Rocket Motor

Gorilla K411BL

Gorilla Rocket Motors
Black Lightning
Ø 75mm
Total Impulse
1785.8Ns
Burn Time
4.33s
Avg Thrust
411.9N
Max Thrust
596.2N

Thrust Profile (N)

4.33s Burn Window
Thrust Curve Missing
No .ENG file data recorded for this motor.

Engineered by Gorilla Rocket Motors, the K411BL is a 75mm solid rocket motor designed for high-power rocketry (HPR). As an official K-class motor, it delivers a total impulse of 1785.8 Ns over a 4.33 second burn window.

With an average thrust of 411.9 N and a peak of 596.2 N, it features a thrust curve optimal for sustainer stages and high-altitude attempts. It utilizes the Black Lightning propellant formulation, dictating its specific impulse and exhaust signature.

Technical Specifications

Tripoli Rocketry Association, Inc.
Diameter 75 mm
Length 728 mm
Hardware 75/2500
Delays (s) P
Specific Impulse 160.8 s
Peak Thrust
Peak Time
T/W Ratio 15.81
Propellant Black Lightning
Profile Unknown
Type reload
Sparky Yes

Mass Budget

2656g Total
Casing (Dry)
1524.0g
57.4%
Propellant
1132.0g
42.6%
Live Sizing
Flight Envelope

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