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Great looking cylinder, Chris! Kim
When they used these, and there was a long pause, was the hammer left in a lowered position? Would the steam cool and condense in the extended portion of the cylinder?
Also, as part of that, I'd like to incorporate a needle valve into the lower passage so I can tune the flow to the bottom end of the cylinder and limit how fast the piston can rise since there is no crank to limit movement like a typical engine. Again, easy to do as long as I plan it out first.
Quote from: crueby on January 25, 2023, 12:24:35 AMAlso, as part of that, I'd like to incorporate a needle valve into the lower passage so I can tune the flow to the bottom end of the cylinder and limit how fast the piston can rise since there is no crank to limit movement like a typical engine. Again, easy to do as long as I plan it out first.If you are only ever going to run it on air, you could (in theory) put a needle valve in the exhaust from the top of the cylinder. This is the way the speed of an air cylinder is usually controlled, as it gives a much stiffer and more predictable system than restricting the inlet.
How would I restrict the exhaust from the top without restricting the flow on the power stroke? Its the same passages used for both.
Your question made me rethink my idea
Quote from: crueby on January 25, 2023, 01:58:54 PMHow would I restrict the exhaust from the top without restricting the flow on the power stroke? Its the same passages used for both. You would need a 'pneumatic diode' in parallel with the needle valve, such as a ball valve. But I do not suppose all that could be squeezedin to the space available. Of course, if you had stuck with the inside admission piston valve, you could have put the restrictor in the exhaust downstream of the valve.QuoteYour question made me rethink my idea Glad to be of serviceAlternatively, could you limit the valve travel so that on the up stoke it is only cracked open?
Looking great Chris!