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Liquid fuel engine bell shape? Answered

What is the best shape for a liquid fuel rocket engine bell, as l have a metal lathe & would like to machine my own engine bell.

2 Replies

mikeasaurusBest Answer (author)2017-03-28

At this scale, I'm not sure that anything other than an inverted funnel would produce drastic changes to thrust. A good place to start would be based of a standard bell shape, and make extended walls along the exhaust to direct the thrust downwards.

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jwzumwalt (author)2017-03-31

This link provides formulas for nozzeles


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