Gallery, Projects and General > How do I??
Dimensions for slow runner
bogstandard:
I think the problem with the very long stroke engines Bernd, is that they are limited to the maximum speed they can run at, and the size of machine you would need to fit one onto it.
Unless you wanted to make a diorama of say a factory installation or as you have shown, a sternwheeler system, then you are very limited in how to use one at that sort of bore/stroke ratio.
John
rleete:
--- Quote from: bogstandard on July 22, 2009, 06:16:01 PM ---The other way would be to put an adjustable friction device on the output side, say on the flywheel rim. It would take very little friction pressure to make it go as slow as you want.
--- End quote ---
That's a good idea, but kinda "cheating", if you know what I mean. I'd rather it just ran slow because of the way I made it. If it doesn't go as slow as I want, well, that's just another engine to be made.
--- Quote from: bogstandard on July 22, 2009, 06:16:01 PM ---For a very quirky effect, have both rod ends anchored, and have the cylinder running up and down the rods. You would need flexible pipework, but that wouldn't pose much of a problem.
--- End quote ---
Might be difficult to control a slide valve unless it was separate, and not moving with the cylinder. Interesting concept, though. I'll have to think on it, and see what I can come up with. Might be fun to see something like that run.
--- Quote from: bogstandard on July 22, 2009, 06:16:01 PM ---I'll keep all the other stupid ideas to myself.
--- End quote ---
No! It's the custom design stuff that interests me. After all, we aren't building anything new, just different ways of putting it all together. Tossing around different ideas is good; gets the creative process started. As long as we can think it up, someone will figure out a way to make it. Might be some really neat engines made from a passing comment here.
rleete:
--- Quote from: Bernd on July 22, 2009, 07:04:41 PM ---The stern wheeled paddle boats used long throw pistons.
--- End quote ---
Yeah, I saw a model of one posted somewhere on the web, just slowly chugging along. Really long throw, complete with paddlewheel. It might be where I get the idea. I just like to watch all the elements move, and when they're running at a blur, you don't get the same effect.
John Hill:
I think if the engine was designed with extremely short inlet valve opening it could be made to run slowly. It would take just a puff of air/steam at the start of the power stroke which would continue to give decreasing power until the piston reached bottom at which time the exhaust would open and stay open for all of the up stroke.
bogstandard:
--- Quote ---Quote from: bogstandard on 22-07-2009, 23:16:01
For a very quirky effect, have both rod ends anchored, and have the cylinder running up and down the rods. You would need flexible pipework, but that wouldn't pose much of a problem.
Might be difficult to control a slide valve unless it was separate, and not moving with the cylinder. Interesting concept, though. I'll have to think on it, and see what I can come up with. Might be fun to see something like that run.
--- End quote ---
That is where the quirkiness would come in, there would be no valve gear on the cylinder, it would have a remote valve block that is operated by the cylinder reaching either end of it's stroke. Just a simple flip-flop valve connected to the cylinder with flexi pipes.
John
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version