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Stub Mandrel

25/10/2010 20:18:36

4318 forum posts
291 photos
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This engine is based on a wonderful engraving I found on the interweb a few years ago. I have no idea of where I found it or what the engine is called, so any ideas welcome. It is based on an A-frame but the other end of the shaft is supported by a brick wall. I have about 400 tiny bricks ready and waiting...

Neil

The frame is fabricated from 3mm steel. The cylinder (just over 2" high) is fabricated from brass, which is why I could only afford steel fro the frame:

The reduced journals (providing positive positioning) are dead to scale:

This approach to a low friction governor valve may be of interest. The o-rings are 3/16" by 1/16" bore:

The water pump has a 1/8" ram and uses an o-ring gland. The valves will be in a separate chamber:

Edited By Stub Mandrel on 25/10/2010 20:19:21

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