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Three piece piston Empty Three piece piston

Post  daviddiag Tue Jul 10, 2012 8:05 am

I keep seeing references to "three piece piston" in early Bees. How does this lay out? Is this a conventional piston, wrist pin, and connecting rod, or is the piston actually composed of three pieces? Any one have pictures? Smile
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Post  crankbndr Tue Jul 10, 2012 8:18 am

I don't have a photo of one disassembled

Three piece piston Img_0653
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Post  daviddiag Tue Jul 10, 2012 8:38 am

Is the retaining piece threaded into the piston body? Does this mean that rod to piston socket clearance could be adjusted by tightening or loosening this piece? How long were these used?
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Post  crankbndr Tue Jul 10, 2012 8:58 am

There is a circle clip that holds the rod socket in place, no adjustment.
I think these were around mid to late 50s, not sure.
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Post  microflitedude Tue Jul 10, 2012 9:03 am

I recall someone saying they were on the '56 Babe bee only.
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Post  aungmyatoo Tue Jul 10, 2012 10:01 am

These pistons can be seen in space bug, space bug junior and thermal hopper with thin wall cylinder.
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Post  crankbndr Tue Jul 10, 2012 10:42 am

The one in photo was in this Golden Bee

Three piece piston Img_0654
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Post  lousyflyer Tue Jul 10, 2012 11:16 am

So was there any method for adjusting the rod end play?
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Post  Admin Tue Jul 10, 2012 11:54 am


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