Big Stirling engine, but not happy with torque! Please help!

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Hi,

I'm new to this Forum! I build a bigger Stirling engine but I'm not happy with the torque.
http://www.youtube.com/watch?v=FJljYbmd ... e=youtu.be-->

Actually I want produce electric with this Stirling engine and want a much better torque performance. I did design this engine in 3D, so I'm looking for a Stirling expert who can review my 3D design and give me some advise what I design wrong or bad!! Please see attached .step file!!

Hope for some answers and help!!

Thanks and regards,
Michael