Miniature Ringbom Stirling engine LTD 'PIETEPEUTERTJE'

Miniature Ringbom Stirling engine LTD "Pietepeutertje" designed and constructed by Huib Visser- The Netherlands 2009.
Displacer box: 15,5 x 7,75 mm ,
Displacer: 12,4 x 2,5 mm, Stroke: 2,5 mm
Graphite "power piston": 2,5 x 4,0 mm Stroke: 2,5 mm Speed: ca.. 650 rpm.
Running time without cooling: ca 30 seconds.

[motormaker]

@SilentRecordStudios It is a Ringbom style displacer. The internal pressure dances around atmospheric pressure on the outside. In essence atmospheric pressure pushes it down and internal pressure overcomes atmospheric pressure to push it up.

[WorldStove]

pure magic. you must have a very very nice mini lathe and mill.

[Stirlingmodels]

Hallo Robert,

Ringboms are free piston engines
The displacer movement is caused by internal pressure differences.
See also my website: Gallery model:
09, 15, 28, 30, 31, 35 (HP: see statistics)

[lecorfec]

Nice Ringbom Stirling Engine!
Did you try to make it run without flywheel on a linear mode with a spring instead of a kinetic wheel to store and release energy?
I wonder what would be the frequency then!
Beautiful job!

[SilentRecordStudios]

How did you power the displacer??? there is no connection rod!

[ghiathkamel]

Can this work on hand temperature, what do you think