Cygnus - Klima€31.90
Equinox - Klima€27.50
Estes motors B4-2
When burntime is more important than thrust. A motor for lightweight to medium weight rockets that require a longer thrust duration.
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Pack of 3 Estes type B4-2 engines, diameter 18 mm
When to use this engine
It is a very versatile engine, required by a large number of Estes kits. The thrust duration is slightly longer than other B engines so this engine is a good choice when you want to push relatively light models at high altitudes.