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Radial engine build


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I did the same thing with valve springs - used only the outer springs where the Dnepr has double springs.

Have you though how you might fit your engine in a bike? It's pretty big to get handlebars and arms around and indeed to see over it!

A friend of mine is building a much smaller radial to go in a bike, using Honda 125cc OHC cylinders and heads.


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  • 1 month later...

There has been very little progress on the radial recently, partly because I have started my own business.


I am offering design and prototyping services.

Rates are flexible - depending on how interesting the work is.

My skillset is mostly in mechanical engineering, with some capability in electrical systems.

If you have any ideas you would like to pursue, I am happy to discuss with no obligation, whether it's a tiny device to mount your GPS or a paramotor trike frame.

Business email: PTwissellengineering@gmail.com.

Thanks to Simon for allowing me to promote my business here.

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