Gallery, Projects and General > Mod-Ups!

Pipe and Bolt Engine Mod-Up

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shipto:
Sorry working on orientation now  :scratch:
The way its running there I am just blowing air into the piston when the piston is at the bottom of the stroke but with luck I hope to be able to rig up a valve that is operated by the cam I have made *see below* mounted on the back there will be a sprung arm which will engage the valve and shut it when the piston reaches top of the stroke allowing the iar in the piston to escape again.
Thats the plan anyway.

vtsteam:
Oh, okay, I get it now, Shipto . That's pretty interesting!!  So the offset pipe section at top is the cam.  :coffee: :coffee:  looking forward seeing the valve setup.

You're coming along great!!  :beer:

RussellT:
Hi Shipto

That's going well.  I'm very impressed with the improvised valve arrangement to get it running.  :clap: :clap:

Steve, I'm waiting and intrigued to see the final bits of the valve arrangements on that engine.

Russell

RussellT:
Thanks Steve, John B.

I've asked a few other people too and nearly everyone thinks it's best left unpainted.  My only reservation about that is the possibility of rust as it's all mild steel but I'm happy to leave it unpainted.

This is the final instalment of my Pipe and Bolt engine construction.

I'd tried running it a few times and discovered it tended to jump around a lot if it wasn't fastened down so I tried balancing the flywheel.  I added a weight (an 8mm nut) fastened with double sided tape opposite the crankpin and big end to see what happened.  There was a definite improvement so I kept adding nuts until it started to get worse again.

I decided to use a bit of pipe to make a permanent counterweight so I parted off a length the width of the flywheel to make the weight.

Here is the engine with the temporary weights and the pipe cut ready for flattening.



I weighed the bit of pipe on the kitchen scales and discovered it weighed about 5.5 nuts, so I bashed it flat and cut it to 8/11 of it's length and curved notched and filed it to fit the flywheel. :dremel:

Here it is glued in place.



I tested it again adding an extra nut to see if my filing had taken off too much, but that made it vibrate more so I concluded the weight was about right.

Here is the promised video.



Thanks Steve for setting the challenge and everyone for the encouragement and comments.

Russell

vtsteam:
Fantastic, Russell!! I'm just in the house for a moment -- been battling a major snowstorm since breakfast. You did a really great job, and the reversing and spindle valve with screw thread bearing was very innovative. Not only that, but this was your first engine ever, as I understand it. Great job all around!!  :bow: :bow: :bow: :bow: :bow: :clap: :clap: :clap: :beer: :beer

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