Request advice, volume ratios of components, displacer, cylinder, etc

[matt brown]

https://www.stirlingengineforum.com/vie ... 2118#p2118

Here's a simple gamma from 1904 with a record of production

What record of production ??? If this engine got 90w from 100-150rpm then Andy Ross was wasting his time. Have you read Andy's book (link recently posted) ?

[spinningmagnets]

From the book Amateur Work Three (3) from 1904! Published by Draper Publishing Company

Oops! you are correct, not in production