The Bucket Foundry

[mr bucketracer]

think mr low would have 20+ bikes

[WilDun]

think mr low would have 20+ bikes

I had 20+ bikes too, but never more than two or three at the one time! - however I still get "the look" concerning the state of my garage, but I've never been completely reduced to the "sure dear or yes dear" thing (and never will!) - well, probably never will,

[ken seeber]

Here's an interesting link, obviously high production rate vs a splash of hot metal in the backyard:

http://www.youtube.com/watch?v=yhtI02aHSnI

And WilDun, here's one just for you:



Ken

[Flettner]

You still going to use the flat four in the autogyro?

I know this is not buckets or foundry but here is a picture of what I've been working on, the new pre rotator drive. No I did not use the small engine in the end, this just seemed simpler. Cone clutch drive runs off the ballance shaft, driven by a belt drive that is the same ratio as the reduction gearbox. So one to one in the opposite direction to the crankshaft. Then small universal through a sliding spline up to the rotor head bendix. Disengaged while in flight,

[Yow Ling]

I know this is not buckets or foundry but here is a picture of what I've been working on, the new pre rotator drive. No I did not use the small engine in the end, this just seemed simpler. Cone clutch drive runs off the ballance shaft, driven by a belt drive that is the same ratio as the reduction gearbox. So one to one in the opposite direction to the crankshaft. Then small universal through a sliding spline up to the rotor head bendix. Disengaged while in flight,

Pretty elegant afterthought. Just out of interest , I saw one of yout gyro's on trade me with a subaru motor, how many have your 2 strokes and how many have subarus? It looks like it would be way harder to add a prerotator to a subaru. Would a flat motor like a fisher and paykel washing machine do this job ? just easier to run some cables than a pto shaft, could rewind it for 12v, Im starting to sound like TZ350 I think

[F5 Dave]

Here's an interesting link, obviously high production rate vs a splash of hot metal in the backyard:

http://www.youtube.com/watch?v=yhtI02aHSnI

And WilDun, here's one just for you:



Ken

Funny Ken i`m reading this while watching Charlie Brown's Christmas. no really i am.

[F5 Dave]

Here's an interesting link, obviously high production rate vs a splash of hot metal in the backyard:

http://www.youtube.com/watch?v=yhtI02aHSnI

And WilDun, here's one just for you:



Ken

Funny Ken i`m reading this while watching Charlie Brown's Christmas. no really i am.


I
instantly saw what I thought was a gas gas cylinder. They (S3) make heads of different sizes, but they all have stupid squish clearances.
I

[WilDun]

Here's an interesting link, obviously high production rate vs a splash of hot metal in the backyard:
And WilDun, here's one just for you:

KEN
Exactly the setup I'm aiming for! - wonder how much that's going to cost me to set up .

Looked at all the tong and ladle ideas, including your ladle, but no need for me to complicate anything I just need something basic.

BTW, I talk to myself too (and often get a favourable response), I live in my own little world but that's ok. cos everybody knows and understands me there!


FLETTNER
I was just wondering if you still use the SUB 4 engine or are you totally sold on the two stroke now? but it looks like you answered the question in the photos.
Has it been flown yet? - guess you'll be the test pilot too? - Pity about not needing the new small engine, guess you'll find a niche for it somewhere.

[Flettner]

Pretty elegant afterthought. Just out of interest , I saw one of yout gyro's on trade me with a subaru motor, how many have your 2 strokes and how many have subarus? It looks like it would be way harder to add a prerotator to a subaru. Would a flat motor like a fisher and paykel washing machine do this job ? just easier to run some cables than a pto shaft, could rewind it for 12v, Im starting to sound like TZ350 I think

Yes there are more electric pre rotators around now, you need about 6 / 8HP for a single seat gyro pre rotator ( to do the job properly ) and there needs to be a soft start or you will bust somthing ( rotorhead ). Here is a good mechanical pre rotator drive getting a good workout. Turbo SUB4 engine, rotor rpm is approx 300 not 220.
Electric needs a decent battery and / or a decent charging system, if you are going to use it a lot.

http://youtu.be/2UPPSyf5QAU

[Flettner]

Forget gyro's for now. What's wrong with this as a concept? Ball valve, uses a piston type ring to seal ( curved sealing surface ) ball sits on bearings, hollow, internally cooled, occilates so the ring gap never goes over the port also gives dwell at open and shut. I have shown this picture here before. This unit would be no good as it's just aluminium and would probably expand and seize perhaps. Tell me why it won't work with maybe a ceramic port liner?
Ring should work just like it would in a cylinder?
I am talking about using it as an exhaust valve in a twostroke head.

[WilDun]

What's wrong with this as a concept?
I am talking about using it as an exhaust valve in a twostroke head.

I am possibly wrong here but I'll take my chances of being ostracised or at least getting egg on my face! :-
Surely, to oscillate something of that size and bulk at crank speeds would take quite a lot of power and some hefty actuating gear to operate it, especially if it's heavier than ally - I don't know what sort of gear you had in mind! (cranks? cams? maybe).

At one time I tried to design something similar (in my innocence at around seventeen) with two oscillating tubes operated on alternate strokes by pushrods from a half speed camshaft, but then I didn't have any engineering equipment or engineering expertise, so never came to anything.

I always felt that the Geneva wheel had some potential here, the experts and detractors say it won't work,- anyway, yes with modern day ceramics anything seems possible.

Suck it and see is my thought!

[Flettner]

I am possibly wrong here but I'll take my chances of being ostracised or at least getting egg on my face! :-
Surely, to oscillate something of that size and bulk at crank speeds would take quite a lot of power and some hefty actuating gear to operate it, especially if it's heavier than ally - I don't know what sort of gear you had in mind! (cranks? cams? maybe).

At one time I tried to design something similar (in my innocence at around seventeen) with two oscillating tubes operated on alternate strokes by pushrods from a half speed camshaft, but then I didn't have any engineering equipment or engineering expertise, so never came to anything.

I always felt that the Geneva wheel had some potential here, the experts and detractors say it won't work,- anyway, yes with modern day ceramics anything seems possible.

Suck it and see is my thought!

Yes, occilating something like this will take power to accelerate but then give it back as it deccelerates maybe? Just bearing friction to worry about?
"Experts", I was told that my uniflow would not last 30 seconds without burning / melting the exhaust ( aluminium ) piston. These experts were from a well regarded university too. So I can only imagine I'm in fairy land with the Uniflow 440 ( in the jet boat ) running at full throttle until the fuel runs out. Perhaps they were right, perhaps it never happened. They had not counted on what I had up my sleeve as to piston cooling. Anyway, forget the experts, I want real world comments. Show me where it's been done ( ball valve in a twostroke head ) and failed and why, because there will be a way around the problem I'm sure.
Ceramic, thats what my new hip is going to be made of, ceramic on ceramic ball ( but no ports cut into it ). Apparetly they are looking at a 25 year wear life. Apparetly wont crack too, so I'm alowd back on the motorbike Just sign this disclaimer.

[WilDun]

Yes, occilating something like this will take power to accelerate but then give it back as it deccelerates maybe? Just bearing friction to worry about?

Like I say, suck it and see,but I'm a great believer in continuously rotating (one kind of rotary engine or another) etc. - this stopping and starting business is something that needs to be overcome! turbines are the way to go on aircraft -but the throttle lag stops them being used on anything else except as generators on hybrid setups - just my opinion
No, I can't find any memories of ball valve exhausts in two strokes, but I do remember a couple of Aussie guys experimenting with a similar arrangement (but rotating) around 35 odd years ago on a Honda 100, but it quietly departed the scene after a year or so, however, if you could find this you might be interested, they must have gathered some good info in the process!
Don't think i've got it in my old scrapbooks, but maybe Husa has the photos somewhere!

[Flettner]

Yes Husaberg will find it.
Will the ring suffer gas sealing issues as the ring is being pushed to opposite sides of the ring groove as the ball moves? Or will the gas pressure overcome this as the ball slows to a stop?

[F5 Dave]

What were Lotus doing? hold on I must mean Cosworth. .