BUILDING AN RMC TYPE ‘B’ ENGINE

Part 5/5 by Jason Ballamy

The engine is designed to run on a surface vapour fuel tank which is based on a 1/2 pint ‘Ball’ jar. To increase the surface area a felt wick is fixed to the lid and sits down in the fuel. This is held together with a central screw that is drilled for the vapour and has a reduced diameter end for a fuel pipe. Here the head of the screw is being slotted.

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Some large brass washers are also needed, rather than slicing up good bar stock I had some old 1/8" brass door kick plates that were cut up and milled to thickness followed by drilling the central holes. A step drill avoids the risk of a jobber drill snatching in the brass.

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They were then rounded off in the lathe.

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This is the finished vapour tank.

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And the inside showing the felt wick.

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Finishing touches include a pulley to go on the other end of the crankshaft turned from the chucking piece...

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...and the nicely etched nameplate. This also has two recessed pockets in it to hold oil. Holes are drilled through this, the bearing housing, and bearings to get the oil down to where it is needed.

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I'm not sure if I like this paint job or whether I should have stuck with the bare cast iron, this is Rustoleum "cast iron" but it's a bit light in colour and looks ‘flat’ as in lifeless not the opposite to gloss. Skids are apple.




 
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