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More help for #5 Robinson

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Old 03-16-2010, 10:02:29 AM
robinson456 robinson456 is offline
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Wink More help for #5 Robinson

Does anyone have a good idea what the clearance should be between cylinder and piston? Having the engine resleeved.
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Old 03-16-2010, 09:41:10 PM
Orrin Orrin is offline
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Default Re: More help for #5 Robinson

When I build my model Stirlings with piston diameters on the order of 2-inches I make the clearance as small as I can, less than a thousandth of an inch. If the piston will not pass through the upright cylinder under its own weight, the clearance is too tight. When it just barely makes it all the way, it is just right.

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Old 03-18-2010, 02:42:24 PM
Dave Allen Dave Allen is offline
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Default Re: More help for #5 Robinson

Hi robinson 456
Here are the original drawings for the No5,it just gives the piston and cylinder measurments as 7.5".I would guess a clearance of 1or2 thou would due,if this proves to tight you always have the option of honning the cylinder out a bit more.Sorry that the drawings were not of any help.
Regards Dave
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