New half rhombic Stirling engine - who knows details of the crank drive?

[tom-rock]

Hi,

I just finished my new Stirling engine with half rhombic drive.
The half rhombic Stirling is much more easy than my original rhombic engine (300W output) which will maybe lend to a useful generator/micro CHP in a small mini series.
I know very little about the half rhombic crank drive and just found a sketch in J. R. Senfts book "Ringbom Stirling Engines" and know that it was invented by Prof. Carlquist.
Does anyone know more about the half rhombic drive or knows where to find information?

To get an idea of the engine here is a YT link: https://youtu.be/s3a7w6yy0J8

HRD Stirling2.JPG (104.08 KiB) Viewed 1993 times

I would be very happy for any help, comments and suggestions.

Best wishes and greetings

Ralf

[Tom Booth]

This is the first I've heard of it. Very interesting. Thanks!