Estes G40-4W Pro Series II Rocket Engine
[EST9775]

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This is the Estes G40-4W Pro Series II Model Rocket Engine. This single Pro Series II Rocket Engine is one of Estes biggest rocket engines. Designed to pack a big punch, this powerful engine is used to send an Estes Pro Series II Rocket flying high into the sky.

Specifications:
Engine Type: G40-4W
Total Impulse (N-sec): 160
Time Delay (Sec): 4
Maximum Lift Wt. (Oz/g): 36/1020
Initial Weight (Oz/g): 4.4/125