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Your Own Design / Re: Dinkus - A Side-Crank Rotary Valve Engine
« Last post by PaulR on Today at 06:46:10 PM »
Quote from: Jasonb on Today at 06:22:32 PM
With this design any slight difference in link rod lengths or throw of the cranks at either end will likely lock things up.
Yes, I thought that might be the case which is why I made the disks in pairs although the front and back pair could be slightly different. As far as I can see the rods are pretty much equal but there's bound to be some small difference. I'll persevere for a while  :ThumbsUp:
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Your Own Design / Re: Dinkus - A Side-Crank Rotary Valve Engine
« Last post by Jasonb on Today at 06:22:32 PM »
With this design any slight difference in link rod lengths or throw of the cranks at either end will likely lock things up. As a temporary measure, you could make a new rod end for one side that has a bit of an oversize hole. Not really the way to do it but it would show if the basic design is going to be a runner.
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Your Own Design / Re: Chris's Slew-Crowd Engines
« Last post by bent on Today at 05:05:33 PM »
Two throttles...hmm.  Is that unique to the Thew?  :popcorn: :ThumbsUp:
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Your Own Design / Re: Dinkus - A Side-Crank Rotary Valve Engine
« Last post by PaulR on Today at 04:49:11 PM »
I've had little time to devote to this over recent days but finally got all the pieces together. However, there's quite a bit of binding and it's really difficult to turn over by hand without a flywheel! I resorted to removing one crank disk at a time and replacing it with a temporary flywheel. It's possible to turn it over when one side or the other is connected but not both  >:( I can see this is going to take some time to sort out let alone trying to get the timing right. Ho hum.
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Your Own Design / Re: Chris's Slew-Crowd Engines
« Last post by crueby on Today at 04:26:05 PM »
Quote from: Kim on Today at 04:12:59 PM
Throttle levers look good, as do the Thew valve guides!   :ThumbsUp: :popcorn:
You're getting close, Chris!  Just the valves left to go? Is that right?

Kim
Yes, after the levers on all the engines I'll  start on the valves themselves. Then it will be time to get them running! Very close!
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Your Own Design / Re: Chris's Slew-Crowd Engines
« Last post by Kim on Today at 04:12:59 PM »
Throttle levers look good, as do the Thew valve guides!   :ThumbsUp: :popcorn:
You're getting close, Chris!  Just the valves left to go? Is that right?

Kim
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Your Own Design / Re: Chris's Slew-Crowd Engines
« Last post by crueby on Today at 03:45:57 PM »
I made up the bearings for the lower pivots on the valve levers for the Bucyrus engine,

and then set up on the rotary table to shape the sides of the levers...

Got the two cylinder valve levers shaped, next up will be the throttle levers (there are two since they sit on either side of the valve rod)
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Introduce Yourself / Re: Historic Models and Reproductions
« Last post by 55fairlane on Today at 11:28:13 AM »
That Gothic beam at Henry Ford is a must see I'm person......it one of the several engines there that will melt your mind......watching (and hearing)  the valve linkage on the Corliss is amazing
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Introduce Yourself / Re: Historic Models and Reproductions
« Last post by PJPickard on Today at 10:34:07 AM »
Yes it is...it used to be outside but was moved in(I think) sometime in the 1980's

- that Gothic engine is the one that caught my eye and made me reach out. I think it's based on the engine at the Ford museum isn't it?
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Introduce Yourself / Re: Historic Models and Reproductions
« Last post by peatoluser on Today at 09:49:52 AM »
Quote from: rblacoste on April 20, 2026, 07:28:11 PM
HI

I found a source for a walking beam marine engine from the Mariners Museum and Park in Newport News VA. They have a ton of material 40 sheets, and they quoted sending scans and photos.  The cost was  $800 so for now im waiting and I think Ill spend that on a trip to the Museum, make dontation and browese the archives.

In (I think 1852) edition of 'The Steam Engine' by Thomas Tredgold, fully detailed drawings of all the major components for the walking beam engine 'New World' were published. I have scans lurking somewhere on my computer. if they are of any use, I can post them on the site or email the folder. Bear in mind, when I scanned them at the British Library, they wouldn't stay flat, so look a bit 'wavy', but all the relevant dimensions are on the drawings. There's 34 scans (some of the pages where scanned a couple of times to make sure I got all the detail) at about 1.2MB each so I assume I could only send them via the cloud? I am a Luddite at heart, so don't really know :)
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