G Class Rocket Motor

Loki HP-G69-SF

Loki Research
Spitfire
Ø 38mm
Total Impulse
110.0Ns
Burn Time
1.60s
Avg Thrust
69.0N
Max Thrust
97.0N

Thrust Profile (N)

1.60s Burn Window

Engineered by Loki Research, the HP-G69-SF is a 38mm solid rocket motor designed for model rocketry. As an official G-class motor, it delivers a total impulse of 110.0 Ns over a 1.60 second burn window.

With an average thrust of 69.0 N and a peak of 97.0 N, it features a regressive thrust curve optimal for general sport flying. It utilizes the Spitfire propellant formulation, dictating its specific impulse and exhaust signature.

Technical Specifications

Tripoli Rocketry Association, Inc.
Diameter 38 mm
Length 127 mm
Hardware 38/120
Delays (s) 5,8,10,13,17
Specific Impulse 178 s
Peak Thrust 97.92 N
Peak Time T+ 0.01s
T/W Ratio 29.31
Propellant Spitfire
Profile regressive
Type reload
Sparky Yes

Mass Budget

240g Total
Casing (Dry)
177.0g
73.8%
Propellant
63.0g
26.3%
Live Sizing
Flight Envelope

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