Best check with the wife for the answer to thatOriginally Posted by WilDun
Bucket Racer/Crasher
Best check with the wife for the answer to that
Muddler/Dabbler.
I know the answer there -but just in case, I need a second opinion!
Muddler/Dabbler.
FLETTNER,
I found this on my computer just by chance, probably filed it away and forgot it, - might interest you as it seems to have (sort of ?) sleeve valve operation of the ports, I dunno.
I'm sure it isn't up and running yet, otherwise we would have heard about it! - the English used in the description is a little hard to follow here and there! ( I think it's probably from Poland).
It could possibly be useful for inspiration at a later date.
http://www.wolfhartindustries.com/engine.htm
Muddler/Dabbler.
This may also interest you - just managed to scan it from my old scrapbook.
Muddler/Dabbler.
Also found this one which I mentioned earlier ......... might interest you, might not.
Hardcore Biker
Just at a look I cant see how this can hold compression without the rotary valve becoming part of a bad shape chamber. inlet or exhaust would be open.Also found this one which I mentioned earlier ......... might interest you, might not.
Muddler/Dabbler.
Andrew,
Just something I had in an old scrapbook and I really don't know what ever became of it.
You are most likely correct in what you say though, as it was never heard of again to my knowledge.
However, FLETTNER was asking earlier for suggestions on OHV designs on two strokes and I just sent this in as a (vague) possibility.
Forum whore
How interesting, this was one of the ideas I had, didn't realise it had been tried before.
Shouldn't this be all over on the oddball engine thread now?
What I ment to say was thank you for posting it.
Forum whore
Just keep em coming Will, they all made from castings.
My neighbours diary says I have boundary issues
Muddler/Dabbler.
FLETTNER & YOW LING.
I just re-discovered that snippet a couple of days ago and when I last looked at it years ago (maybe 20), I was looking from a two stroke perspective - it was two stroke only for me in those days).
The Odball Forum? - No, this is about the valves we were discussing I would rather keep it here.
- You see what I mean about not getting all that stuff in with the foundry thread too much? - all good fun though!
However I'm just not able to get things like this going these days (haven't got the oomph - maybe never had!) - but if you are interested Flettner..... but for me it's far from being even a a serious thought!.
YL, - Yes, got some more of this old stuff I'm digging up every day, I'll put it on here as I won't really be doing much with it now. When I kick the bucket, (eventually) it'll all end up in the tip for sure!
Low personal B.M.E.P.
One face of the rotor plain - firing when this is in place blocking the port slots in the chamber. Sealing ? Mmmh.
One face exhaust port
One face inlet port.
Very poor flow lines, masked ports, poor flow efficiency. If you want better, you'd have to go much wider with the rotor - and it looks heavy at the top now.
Aspin did it better with his later cylindrical rotary valve. inlet one end, exhaust the other. Massive heat problems but...
Muddler/Dabbler.
Wasn't the later model Aspin still a conical valve? I know the Cross was cylindrical. but then it's a long time since I last looked.
As I remember it from studying how it worked, that's probably 30 years ago, it had it's problems and in order to overcome some of those, the rotational speed was not constant. (I think) it slowed up under compression and power strokes and was sped up again, by a complicated drive either by using some sort of crank arrangement on the drive gears, or perhaps an elliptical gearing arrangement in the drive. (Might find that somewhere, been a while though.......)
Still didn't cure all the problems, and it faded away - sad to see that happen.
EDIT. - I read that he started using planetary gearing on the input to the valve to speed up and slow down the rotation.
But maybe it tells us something, either put up with lots of smoke and worn valves (through the sliding motion) of the rotary valves, or red hot rattly poppet valves with all their restrictions!
Guess which has been winning for the last 100+ years!
As for that picture of the "wankel valve" - it never was developed to my knowledge and I agree that it would be a hard job to get it to work the way it appears in the pic, but who knows, with a bit of rearranging as to how it is used, it stands as good a chance as Aspin or Cross I reckon.
Muddler/Dabbler.
This is what I was referring to
Forum whore
this search covers a fair bit of ground
https://www.google.co.nz/search?q=as...tm%3B400%3B300
http://way2speed.blogspot.com/2012/0...n-engines.html
My neighbours diary says I have boundary issues
Muddler/Dabbler.
Yeah, checked all that a couple of nights ago, already knew about half of them, the rest are new (to me).
In one way it's fantastic and then it's also sickening to know that we're in the bloody information supermarket!
"Paradise" is what I would have called it 30 years ago when we had to scratch for info. Now it's coming out of our ears - and what do we do with it? - we "file it away till later" and later will be too late! (apologies to Flettner of course).
I still have one or two little snippets which I haven't seen there and with a bit of luck, mine won't look spectacular enough to end up in a great supermarket shelf. Having said that, I still go through them, can't help myself!
Back to foundries, I lit up my furnace today, heated it up with a hot air gun first then ran it for about an hour with the burner. It was quite close to the house so I had to put up some sheilds, Then finally the gas ran out, but not before it got quite hot - it's now in the process of cooling down.
Was all a bit inconclusive really and I'm not totally convinced that my super duper burner is hot enough, but then, as always , I could be wrong!
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