Gallery, Projects and General > Mod-Ups!
Pipe and Bolt Engine Mod-Up
SwarfnStuff:
Hi, Just my thought on the air leakage along the thread. Would it be worth trying some of the thicker type grease, - Say that white stuff the name of which I cannot recall? Ok, it might just blow out or make the valve stiff but hey! this is an experimental job anyway, right? And, " anything you try is not a failure but just one more thing you know that doesn't work". (I think that is a misquote from the guy responsible for this - :smart: ) A fun thread.
John B
RussellT:
Hi John Yes I was thinking grease might help - read on.
Steve I hope you've survived the weather. US weather even made the TV here yesterday.
I drilled the ports today, they're still a bit undersize but I think it will work best if I open them out with a needle file when the whole engine is assembled, that way I can see how they are opening and closing.
I did make one mistake in drilling the ports which was to assume that the bolt was bottoming out in the nut (which is sealed at one end) and I'd cut the bolt to fit that length. Unfortunately that left a gap at the bottom of the bolt so the port was too close to the end of the bolt.
I fixed it by redrilling the port further up the bolt which should be OK. If I'd done it right I would have been able to separate the inlet and exhaust ports by a few more threads.
Anyway with the ports drilled all the moving parts are done and I was impatient to see if it would work. So I stuck a nail (undersized) in a bit of wood and clamped the nut (bearing/cylinder support/valve mechanism) to the wood.
To start with I had no luck, but then I added a bit of grease to the threads.
Here's what happened.
Russell
DMIOM:
:clap: :clap: :clap: :clap:
vtsteam:
Russell, I'm grinning ear to ear!! :thumbup: :thumbup: :thumbup: :thumbup: :thumbup: :thumbup: :thumbup:
That has to be the simplest oscilating engine, ever, too! No spring, no bearing per se.
Just wonderful!! :clap: :clap: :clap:
dsquire:
Russell
Give the man a cigar. :ddb: :ddb:
It's nice to see something different like this come together. Now we will be looking for Mk.II. :D :)
Cheers :beer:
Don
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