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Old 01-03-2017, 11:50 PM   #61
apointofview
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The connecting rods are supposed to be three pieces as drawn on the plans. That also requires bolts smaller than I have on hand so I opted to change the plans. I made the rods one piece and bushed both ends with brass. Since my crank shaft can be disassembled the rod bearing does not need to split. I was going to leave the rod squared off, but clearance in the crosshead guide was a problem so I had to back up and turn down the center section of the rod. I assembled what I have so far and spun it up with the lathe and lots of oil. It's a little tight here and there but that can be worked out.
Pete
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Old 01-04-2017, 05:54 PM   #62
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Looks great! Can't wait to see it under power. I've been following your project with interest and can't believe how small the components are! ��

Thanks for sharing. ��


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Old 01-04-2017, 11:17 PM   #63
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Hi Pete,
Like a41capt I have been watching your progress, the engine is sure looking good.
Some times when you go off the drawing you have to improvise and most times it works out for the best.

I look forward to it's first steaming.

George.
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Old 01-06-2017, 07:35 PM   #64
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Default A Smaller Steam Engine For A Smaller Boat

Thanks guys, it sure is fun to share this stuff with people that have similar interests. When I try to show the wife and kids I get a collective " that's nice"
More progress - I guess these are cam followers ? A bit of a miss read of the print got me another deviation. The leg on the ring is supposed to be roughly twice as long to allow the valve connecting rod to thread into it and a jam nut secures it. Well I didn't want to waste the time and metal that I had in it so I am going with a stud in the ring with a jam nut sleeve to secure it. The rod will be drilled and threaded to mount on that stud and a nut to secure its position will be made to cover any gap and dress it up.
I thought that building off plans would be a piece of cake but turns out if you don't study the drawing carefully chaos quickly ensues !
Pete
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Old 01-11-2017, 04:19 PM   #65
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Time to connect up the valve spool to the cam followers. Not much trouble here, but something must be a little off because with everything assembled there was a large increase in effort to turn the engine over. Turns out the alignment of the cam to the valve body needed work. I don't know if the drawings are off, it's hard to tell since at this point it could be a stack up of tolerances. I had to turn down the flywheel that dictates where the cam sits to move the valve bodies closer to the cylinder blocks. That fixed the alignment, just wish I knew what happened. I have cut all the parts to the sizes called for as close as I can pull off at least.
So that's most of the moving parts, next up is the steam control valve. That thing has a million holes in it !


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Old 01-11-2017, 05:07 PM   #66
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Hi Pete. Iím still following along. Between work and life in general I havenít been able to get any shop time for myself so I have to get my hobby fix vicariously through others. The engine is turning out beautifully, thereís something about the symmetry I find very appealing.
I just wanted to say thanks for posting your build. I can appreciate the extra time it takes. Setting up a part, stop, take a picture, put the camera back into the ďsafeĒ zone, finish the part and repeat.

One day Iíll be able to get back into the shop and make some chips but for now thank you.
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Old 01-14-2017, 04:52 PM   #67
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Bmac2 - thanks for the great post, it's funny to think I am doing something guys want to watch. I feel like a hack most of the time especially when I see the other projects on this site !!

It is surprising how much thought it takes to do a build thread. It's turning into a test for my iPhone on how well it holds up to metal bits and cutting fluids etc !
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Old 01-15-2017, 11:04 PM   #68
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The steam control valve has been the part I have been not looking forward to from the time I first looked thru the drawings. I am not sure if I could have pulled off this part if it weren't for fcheslop's post back on post #20 that directed me to the drawings by Julius de Waal. Those drawings made the 31 hole locations much clearer, thanks again fcheslop !!!!!!

I started with a hunk of roundstock that was a bit big for the part but it was the closest stock I had around. I started with the face that needs to really smooth for the directional valve to rotate on and be fairly steam tight. From there it was a hole tapped for a shaft that the valve rides on and then into the mill to square it up. Back to the lathe to part off the block and then more mill work for the bottom relief. Once that was done came the intimidating job of all those holes. It's tough to drill into something I have so much time into ! I took my time and triple checked every dimension before sinking the drill bit into it. I made my own notes/drawings for each side just to keep my head clear on what I was doing. Looks like it came out like it should so I can quit holding my breath !!
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Old 01-15-2017, 11:08 PM   #69
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Here are the rest of the pictures

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It's gonna need some more smoothing of the faces where the steam pipe flanges mount to make them seal well but so far so good !

Pete
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Old 01-16-2017, 06:17 PM   #70
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Superb work Pete! I hope you show it installed and running your newest boat when completed.

Thanks for all the great documentation.

John


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