G Class Rocket Motor

AeroTech HP-G138T

AeroTech
Blue Thunder
Ø 29mm
Total Impulse
157.1Ns
Burn Time
1.14s
Avg Thrust
138.0N
Max Thrust
190.1N

Thrust Profile (N)

1.14s Burn Window

Engineered by AeroTech, the HP-G138T is a 29mm solid rocket motor designed for model rocketry. As an official G-class motor, it delivers a total impulse of 157.1 Ns over a 1.14 second burn window.

With an average thrust of 138.0 N and a peak of 190.1 N, it features a dual-peak thrust curve optimal for general sport flying. It utilizes the Blue Thunder propellant formulation, dictating its specific impulse and exhaust signature.

Technical Specifications

National Association of Rocketry
Diameter 29 mm
Length 124 mm
Hardware RMS-29/40-120
Delays (s) 6,8,10,12,14
Specific Impulse 228.8 s
Peak Thrust 194.69 N
Peak Time T+ 0.947s
T/W Ratio 95.05
Propellant Blue Thunder
Profile dual-peak
Type reload
Sparky No

Mass Budget

148g Total
Casing (Dry)
78.0g
52.7%
Propellant
70.0g
47.3%
Live Sizing
Flight Envelope

Design wings in your spreadsheet

AeroSheet loads airfoils directly into Google Sheets. Polars, 3D splines, Fusion 360 export, without leaving your spreadsheet.

Google Sheets Install in Google Sheets coming soon
Comparable G-Class Alternatives

G54W

AeroTech

G
dual-peak
Total: 81 Ns
Ø 29mm

G104T

AeroTech

G
regressive
Total: 82 Ns
Ø 29mm

G74W

AeroTech

G
neutral
Total: 83 Ns
Ø 29mm

84G88-11A

Cesaroni

G
dual-peak
Total: 84 Ns
Ø 29mm

G142

AeroTech

G
neutral
Total: 84 Ns
Ø 29mm

G63

SkyR

G
regressive
Total: 85 Ns
Ø 29mm
Veenie Kit

Need a custom engineering simulator?

The 3D engine on this page is built by Veenie Aerospace. We build bespoke, browser-native digital twins, aerodynamic simulators, and AI physics tools for UAV startups and defense contractors.

ivan@veenie.space
Loading calendar...
ivan@veenie.space