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1
When your rocket needs a fast, steady boost and an earlier recovery, the Estes C5-3 engine delivers. With a total impulse of 10.00 N-sec and a thrust duration of 1.85 seconds, this 18 mm engine is engineered to provide a longer, sustained p...
Reviews
4.9
26 ratings
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Haven’t started building the Gemini yet but can’t wait to get at it. Had one when i was a kid in the early 70s and so happy they brought it back.
D
David · April 22, 2026
moving up
Engine was a great way to get into mid range engines and additional altitude.
A
Anonymous · May 21, 2026
Estes always provides the best quality Rocket materials hands down. I 've been using them for years.
