Pipe and Bolt Engine Mod-Up

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RussellT:
Hi Steve

I was thinking of having a go. :scratch: :loco: :scratch: :coffee: :scratch:

Am I allowed to use a nut that fits the bolt or do I have to drill and tap the head of the bolt (or screwcut as I don't have a tap the right size)?

Russell

vtsteam:
Russell, that would be great. Don't worry about the bolt! If it's an engine made from pipe we'd all love to see it being built! :beer:

RussellT:
Hi All

OK. I've decided to have a go. :dremel:

I've never built an engine and this seems like a good enough excuse to try. I've got a few other things on at the moment so I don't want to spend a huge amount of time on it, so it will be a simple engine.

Before settling on a design I reviewed the materials available.

I found some half inch bolts

and some pipe fittings.

None of those gave me any immediate inspiration. :scratch:
So instead of spending hours on building an engine I've spent hours thinking about how simple I can make it. :smart: :loco: I thought about a simple steam (compressed air) engine with a bash valve but in the end I've decided on a wobbler.

I'm going to use one of the short bolts and make up the missing length with some half inch bar. The only six inch bolt doesn't have a hex head which I think will be useful.

First I made the cylinder. I scrubbed the surface rust off a bit of scrap half inch bar (an axle off a luggage trolley I think) and faced it.

I turned it round faced and centre drilled. Drilled through and reamed. I was disappointed with the finish but a 3/8 bar pulled out with a satisfying pop so I decided to go with it anyway.

I machined a piston.

I think the fit is OK. It moves freely until I block the end of the cylinder.

Here are the piston and cylinder next to a tin of connecting rods.

More to follow. :coffee:

Russell

vtsteam:
Russell yer makin' the cylinder out of the bolt instead of a pipe?!
Well I hadn't anticipated that one! :lol:
:coffee: :coffee:

Manxmodder:
"Here are the piston and cylinder next to a tin of connecting rods"

I hope they're 'guaranteed to do exactly what it says on the tin' :lol: :lol:....OZ.

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