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| steamcollector |
Bowman PW202 Piston and Cylinder Dimension RequestedIf you have a PW203 (or PW203 I think is the same) please could you let me have the dimensions of the piston and cylinder.Here is a drawing I made based on scaling from various photos on the internet. I suspect the cylinder is not too bad but the piston may be way out as you generally don't see the piston in the photo. 
I cannot work out the bore of the cylinder at all so that is left blank. If you would like to see photos of the whole engine then click Here I know this is probably a big ask but all contributions would be much appreciated. I cannot reply for the next 2 weeks as I'm on me hols so don't think I'm being standoffish or anything. Regards Will PS You will note that I have not put the position of the ports. I was expecting to use the actual port block as a template for positioning these. I'm assuming that is the best way to do it? |
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| johnreid |
I will try to mike mine within the next day or so, I have the PW203. | ||
| Atticman |
Do you mean the Overtype PW?
I will have a look |
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| steamcollector |
Sorry misprint in the original post.
It's the PW202 overtype version I want to make the piston/cylinder for but I think the PW203 also uses the same? Will |
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| Nick |
Is this the one that was on ebay a few weeks ago? | ||
| steamcollector |
Heres the link if it helps Nick
Pretty much all of my engines come from ebay. |
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| johnreid |
I apologize for taking so long, I forgot
Are these the measurements you wanted? Piston OD 
Cylinder ID 
Measurements in mm |
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| Nick |
That's the one, I was 2nd high bidder on it. I'm glad I got to see it again. 
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| steamcollector |
Thanks for taking the time and trouble to do that John. Very much appreciate it.
I presume my other dimension guestimates are reasonable. I used the piston from a M175 to get the 29mm and 9mm lengths. Is that correct? Also the connecting rod looks, in the photo like it's made of brass and not steel as I at first thought. Regards Will |
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| johnreid |
Those are from my PW203 | ||
| steamcollector |
Nick.... I don't know what to say!  If I say sorry you will know I'm lying as I am really pleased with the engine.
If it's any consolation (probably not) it's usually me that comes second in an auction. I certainly lose a lot more than I win anyway. Will |
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| Nick |
It's no problem, we both bid what we were willing to pay. I am just glad to see it again.
If I remember right there were several forum members interested in the engine when it was on ebay. |