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Quantity
1
Description
The Estes B4-4 Rocket Engines are ideal for mid-powered model rockets that demand a steady climb and reliable deployment. These single-stage, 18 mm engines offer a balanced performance with moderate thrust, making them a great choice for both new hobbyists and seasoned flyers looking for consistent flight results. The B4-4 is specifically...
Reviews
4.8
21 ratings
5
4
3
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1
I was overjoyed to reconnect with Estes once again. It was one of the most enjoyable hobbies of my youth in the 1970’s! Now I’m doing it with my grandkids. These are great quality hobby rocket engines
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David · August 5, 2026
Excellent as usual
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Deborah · 6 days ago
I love your product's I have been flying Estes rocket's since I was a kid.
