Potty Lads and Dads Engine

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vtsteam:
What a great looking little engine this is going to be! I love the horizontal mill engines. :thumbup: :clap:

sbwhart:
My offering this morning are just a few of the fiddly bits that need doing.

Drill and tapped the eccentric for a M3 grub screw

As I drew the engine up I relised that there was no provision for setting the valve event, I scratched my head on this one for some time then I had a look through the pic I took of the origonal engine to see how they did it.

So decided it would be best to try and copy this arangement.

This require some 3mm dia cross holes drilled. The parts are made from 6mm dia stainless first off I drill and parted off a thick washer with a 3mm hole, I then used this to locate for the cross holes.

It was just a mater then of turning up the parts.

This is how the orangement looks on the model, that cap screw gets in the way so I'm going to replace it with a grub screw.

I'm keeping my fingers crossed that it hase enough movement to activate the valve.

Stew

Stilldrillin:
That should give a good range of adjustment Stew! :clap: :clap:

You can always mill a couple of flats, to slim the clamp block for extra clearance....... :thumbup:

David D

Dan The Man:
HOW QUICK!!!!! I have made 6 easy bits in the time you have almost finished it! Top Man Stew :)

sbwhart:
Cheers Dan

You and your Dad are going to have to get a move on :D

I'm waiting on some steel tube to make the fly wheel so decided to get on and finish the bed plate off, I carfully marked the position for the crank bearing and drill them out 2.7mm clearance on M2.5. The bit of ally I made the bed plate from was 3" wide I wanted 2" but that was all I could get so had to cut it down, using a hack saw and a guide plate, so that things didn't wander off.

Then filed the cut off level, noting too fussy just as long as it doesn't offend the eye.

The drill 4 corner holes and filed some fancy rads on the corners.

Assembled the engine back to the bed plate, and fixed a carrier to the crank shaft to try and turn it over, turned over ok, but the valve rod thing fouled, did a bit of adjustment, phew ther's enough clearnace for it travel its full movement, I roughly set the valve and spent 1/2" turning it over by hand it nows turn over nice and free.

Can't wait for that steel to arrive.

Decided to make the base, these sort of engine often stood on stone plyths, so got hold of some chip board, cut two bits off to size and rounded the edge, then cut and filed some nicks along the edge to simulate the stone courses.

This is what it looks like.

I'll give it some licks of paint I'm hoping that it will keep its rough texture to look like stone. I aplied some wood glu and clamp them together, I'll see what they are like tomorrow.

Stew

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