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Quantity
1
Description
The Estes A3-4T engine is a single-stage mini model rocket engine built for lightweight rockets and designed to deliver consistent, reliable performance. With a total impulse of 2.50 N-sec and a peak thrust of 6.80 newtons (1.5 lbs), this 13 mm diameter engine provides a solid boost for rockets weighing up to 2.0 ounces (57 g). Its 4-seco...
Reviews
4.9
15 ratings
5
4
3
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1
Exactly what I needed
H
Hillary · July 1, 2026
Haven't used them yet, but the packaging is very eye catching.
R
Robert · May 17, 2026
I have bought these as a Birthday Gift which is not until July.
