Gallery, Projects and General > Mod-Ups!

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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