M Class Rocket Motor

AeroTech M685W

AeroTech
White Lightning
Ø 75mm
Total Impulse
7561.0Ns
Burn Time
11.50s
Avg Thrust
657.0N
Max Thrust
1517.0N

Thrust Profile (N)

11.50s Burn Window

Engineered by AeroTech, the M685W is a 75mm solid rocket motor designed for extreme high-power rocketry. As an official M-class motor, it delivers a total impulse of 7561.0 Ns over a 11.50 second burn window.

With an average thrust of 657.0 N and a peak of 1517.0 N, it features a regressive thrust curve optimal for heavy rockets requiring high off-the-pad acceleration. It utilizes the White Lightning propellant formulation, dictating its specific impulse and exhaust signature.

Technical Specifications

Tripoli Rocketry Association, Inc.
Diameter 75 mm
Length 935.9 mm
Hardware RMS-75/7680
Delays (s) P
Specific Impulse 178.4 s
Peak Thrust 1380.01 N
Peak Time T+ 0.308s
T/W Ratio 9.56
Propellant White Lightning
Profile regressive
Type reload
Sparky No

Mass Budget

7008g Total
Casing (Dry)
2688.0g
38.4%
Propellant
4320.0g
61.6%
Live Sizing
Flight Envelope

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Comparable M-Class Alternatives

M1200-SF

Loki

M
neutral
Total: 5123 Ns
Ø 76mm

2800CC300MFX-M960FX

Hypertek

M
regressive
Total: 5126 Ns
Ø 75mm

2800CC200M-M740

Hypertek

M
regressive
Total: 5143 Ns
Ø 75mm

M1355RT

Gorilla

M
neutral
Total: 5165 Ns
Ø 75mm

M1350W

AeroTech

M
dual-peak
Total: 5178 Ns
Ø 75mm

5198M1101-P

Cesaroni

M
dual-peak
Total: 5198 Ns
Ø 75mm
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