Member postings for Martin Field

I'm assuming, Barrie, that I would need to make a new liner and piston with no 2 stroke holes in them. That's just a start. I'll check out the Webra and Vega.

Thanks,

Martin

Ah, I think I have some details of that somewhere.

My problem is I can't do major components on my lathe and I don't have a mill, so it really needs to be lesser bits as part of a conversion.

Thanks for your response.

Martin

Hi,

I have a couple of Merco 61s and would like to try 4 stroking one of them for use in a model aircraft.

I was thinking of going the usual pushrod and rocker method, but then started thinking about doing a belt driven OHC version, possibly even a twin cam.

Can anyone direct me to a thread of any similarity or articles in ME over the years? I have a small lathe, but no milling machine so part would have to be fairly small.

TIA,

Martin

PM sent, fizzy

Martin

Ah, yes, I see it now, thanks, Jason.

Martin

Fizzy, yes, I assume so. But I'm not sure how you PM people off this forum.

Martin

Jason, I think the copper is about 1/16th" thick. It was the roof exhaust from our old historic ex-working canal boat. One of the few bits we kept.

Sorry I misunderstood your suggestion.

Martin

I guess about 8 " overall, plus chimney. Maybe a bit less.

I can silver solder fine, although I've never done a boiler. I can turn the bushes for fittings, no problem.

The problem is one of time, so not too complicated. I have a good size pillar drill, but no milling machine.

If it's easier for you to do it for gas, go with that as everyone is worried about coal firing!

This is very kind of you, fizzy. Are you sure about this? Maybe there's something I can do for you.

Cheers,

Martin

Fizzy, that's very kind of you!

I was going for coal because I love the smell and I wanted smoke. I also didn't want all the clobber that goes with gas. I suppose I could hide some of it under bogus lockers, maybe, but I wouldn't want it all sitting around in what my old boss would call brass bound buggery boxes.

If you could design the clobber either out of the way or into something else, I might consider gas, although I know nothing of how to use it. The tube I have for my boiler is 3 3/4" diameter. I have about 10" of it.

The engine is a 5/8th" stroke x I would say the same in bore. The V10 is 3/4 x 3/4. My hull is 36" long and 8 1/2 beam. It is, in fact, a tug, but by shaving off some stuff and changing scale it makes a nice steam launch which already has a large prop and shaft installed.

Cheers,

Martin

The reason for going coal fired is to get some real smoke up the chimney and because I don't like all the clobber involved in gas firing, but mainly for the smoke and the smell.

I guess GLR's kits are reasonable, but beyond my resources in one hit.

Cheers,

Martin

Hi all, I have a smallish single cylinder launch engine (5/8x5/8th" and would like to build a vertical boiler that I can coal fire, to go in a nice launch hull.

Do drawings of such an animal exist. Nothing too big please. I have some 3 3/4" copper tube.

Cheers,

Martin

Yes I do,

but that is a consideration. Some are much worse than others. But I take your point about the solid bar stuff. not that cheap either is it? But then I don't need a metre and I do have a lot of existing sheet brass for entablatures, etc.

Perhaps it's possible to buy odd castings separately.

For steel and ally I have a friendly local machinist who casts more into the skip than I'll ever need.

Anyway, this is a new hobby and there's much to discover.

Cheers,

Martin

I guess that's a possibility, John.

Mind you, for what some charge for castings I'd expect them to have been linished by Miss Worlds and polished with fairy dust!

Cheers,

Martin

Ah, so Froggite is one of yours?

Martin

Is that where the term "Frog" comes from?

Martin

Nick, that LOOKS like bronze to me.

And did you say Frogite?

Martin

I just asked my wife, who thought it was a liquid for making one metal look like another!

Bless her, she'll always come up original!

Martin

That's the odd thing about it all. That gunmetal is these days more associated with grey. It's always been a descriptive of a car colour or a fabric.

It's only metalworkers who tend to know that traditionally, gunmetal is a bronze.

Martin

There's a club in Brandon, where I'll be going to see what they're like next Wednesday. Ram Hotel, 7-30.

See you there?

Martin

Yep, Cambridge is a bit of a hike from here!

Martin