ESE's works engine tuner

[monkeyfumi]

Have you had your FOS cylinder running yet Frits?

[Flettner]

No problem Frits, I can get holes in the thick part of the casting, poor foundry techniques and we could get shrinkage voids where ever you want.

[husaberg]

OK i will bite why can't you just cast in a thin tube of a higher melting point metal to create the void.....

[Grumph]

No problem Frits, I can get holes in the thick part of the casting, poor foundry techniques and we could get shrinkage voids where ever you want.

Ha, sadly, all too common...

Husa, remember that where you want air or water in a barrel casting, you must have a core...putting a short, call it a joiner, core between
the water passages each side of a transfer and between the cylinser wall and the transfer wall would call for pattern work of the highest order...

[husaberg]

Ha, sadly, all too common...

Husa, remember that where you want air or water in a barrel casting, you must have a core...putting a short, call it a joiner, core between
the water passages each side of a transfer and between the cylinder wall and the transfer wall would call for pattern work of the highest order...

Think further along the process, Say "Where you want alloy is there is actually fresh air". So adding a higher melting point tube in theory could be practical. if not a little tricky to position.
Think about the cast in sleeve for instance. Only in reverse.

[Flettner]

Yes quite possibe, but the problem would be holding it in position while casting. You would need some sort of attachment from the "tube" you want to hold in place to the outside ( just like what a core print does ). A metal ( steel ) tube would expand on contact with the hot metal so the attachment would need to be flexable. Not impossible by any means but tricky. You would be better off just making another core box and mould a hard sand core with core prints ( to hold it in place ).

Just sent one half of the 360 engine case pattern to the foundry today, other half is still getting finishing touches. This project has been sitting for too long.

[Frits Overmars]

No problem Frits, I can get holes in the thick part of the casting, poor foundry techniques and we could get shrinkage voids where ever you want.

And only where I want?

[wax]

What engine are you building this cylinder for, I cant see where you said or if you did

[Flettner]

No, you are right, I didn't say.

[Drew]

No, you are right, I didn't say.

You seem to have some cards...glued to your chest.

[Flettner]

Ok, it was crapy glue anyway. I'm not sure is the real answer. I am concidering a YZ125 as a base but either way I'll need to re make the cases as the transfer port arrangement won't suit. Also I'm not sure anyone has noticed yet but this cylinder is not an FOS type, although it may look like it. There is an extra part I haven't shown yet, see below. Remember it's a uniflow scavange type, with one piston.

OK now I've shown the missing part, let the "debate" begin.

[IMG][/IMG]

[Flettner]

It's not finished yet it needs the centre grinding to size, honeing inside and out, then nitrided. It has been double stress relived during manufacture.

[F5 Dave]

I was expecting you to answer The Flett008 of course.



but ok I'll start the ball off in the usual time prescribed manner;


your idea will never work, else why has Honda not done it before?


Just to make you feel at home like.




Seriously though, enjoying this thread lately

[190mech]

First post here;Ive followed this thread for years!
Looks kind of like a sleeve valve cylinder??

[mr bucketracer]

First post here;Ive =followed this thread for years!
Looks kind of like a sleeve valve cylinder??

+1 also can get ones that can rotate as well