Porous Bronze v Phosphor Bronze bearings for model engine

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Steve W - 31 Jul 2007 18:18 GMT

Just planning my next escapade, a v-twin 9cc aero engine. The front
crankshaft bearing is a plain bearing called off in porous bronze. At
8000rpm for short duration runs, eg 5mins is porous bronze really necessary?

Regards

Steve

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Peter A Forbes - 31 Jul 2007 18:24 GMT

>Just planning my next escapade, a v-twin 9cc aero engine. The front
>crankshaft bearing is a plain bearing called off in porous bronze. At
[quoted text clipped - 3 lines]
>
>Steve

Unless you have positive lubrication, yes. The porous medium holds oil.

Peter
--
Peter & Rita Forbes
Email: diesel@easynet.co.uk
Web: http://www.oldengine.org/members/diesel

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Model Forum / General / Models / July 2007

Porous Bronze v Phosphor Bronze bearings for model engine