Piston material for S50 engine

Piston material for S50 engine

This topic has 2 replies, 2 voices, and was last updated 22 September 2011 at 22:00 by Bogstandard.

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22 September 2011 at 20:36 #21936
The Merry Miller
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@themerrymiller
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22 September 2011 at 20:37 #75299
The Merry Miller
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@themerrymiller
This question has probably been asked many times but search as I might I can’t find answers on this forum.

The raw material supplied in the kit for the Stuart S50 engine is supposed to be brass but it has a slight coloured sheen on the outer face which leads me to believe that it may be phosphor bronze.

The question is what is preferable for a piston operating inside a cast iron cylinder, brass or phosphor bronze?

I’ll most probably be running on compressed air until I have built a boiler for it.

Len. P.
22 September 2011 at 22:00 #75300
Bogstandard
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@bogstandard
It wouldn’t really matter in your situation, but the bronze would be a little better in the wear stakes.

You might find a little difference in the machining, but I would expect Stuarts to supply a free cutting bronze anyway, so just go ahead and use it, the sky won’t fall on your head.

John
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