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Author Topic: engine for Totnes Castle  (Read 178 times)

hammer

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engine for Totnes Castle
« on: June 14, 2018, 09:45:36 AM »

I have posted the build Totnes Castle in working vessels. For steam buffs the boiler here as my 7th.  Now the engine, a twin oscillator double acting, bore & stroke 10mm.
The cylinders & end caps drilled & turned off centre. I just pack one jaw of the chuck 1/8ins. Next job mill off the port face to increase the width,  (black mark & arrow.) I will be reducing as much thickness of metal as possible. to reduce start up condensation.
I have included the fag packet sketch it may end up like it.
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hammer

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Re: engine for Totnes Castle
« Reply #1 on: June 21, 2018, 03:47:03 PM »

Laid out as original plan. But original Standard sadly distorted when silver soldering together I got it to hot. A change of plan I now intend have two output gears one at 3to1 the other at 5to1. Three to one is my normal preference. But the 12 floats (paddles) are very close together so will start with 5to1. If this is slow can use 3to1 without much trouble.
I have remade the standard,  Second attempt soldered the bar then machined it after, this stopped any distortion. Stainless pivot bar fitted, will cut out inner section later. Large hole for removable crank bearing.  Just the exit holes to the ports to drill when the crank it finished & blank off the 4 ports at entry end.
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