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Tooling & Machines / Re: Hemingway Knurling Tool
« Last post by Don1966 on Today at 02:13:31 AM »
Very nicer work better yet a very nice tool…. :Love:


Don
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Great project and very useful tool. You will enjoy building it. I built this tool 9 years ago. There are riser plates that you can get from Hemingway and a swivel base. My built is here.. https://www.modelenginemaker.com/index.php/topic,2031.msg31584.html#msg31584


There is also a micro attachment calculation sheet also used for the dividing head. https://www.modelenginemaker.com/index.php/topic,4965.msg94796.html#msg94796

Regards Don
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Vehicles & Models / Re: Pennsylvania A3 Switcher (Kozo)
« Last post by Dave Otto on Today at 01:30:14 AM »
Hi Kim

I usually do 800x600 because that seems to be the accepted standard for this forum. Sometimes I will break the rules and go up to 1024x768 which I prefer.
I think your photos are great, I do prefer the larger resolution.

Dave
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Your Own Design / Re: V-TWIN--MAYBE V4
« Last post by Brian Rupnow on October 04, 2022, 11:09:48 PM »
And now, it's time to go all scientific. The engine runs, but it doesn't run the way I like it to. The left hand cylinder runs like a champ, the right hand cylinder runs some of the time. Some of the time, it doesn't run. and when it doesn't run, it puts so much drag on the left hand cylinder that it stalls out under the load of carrying the non firing cylinder. Generally I use a degree wheel to set the valve timing, and lay the sparkplug out on the cylinder head so I can manually crank the engine over and watch to see when the spark occurs relative to the piston position. Somehow, that doesn't seem to be working for the right hand cylinder.---So, tomorrow I will once again get my degree wheel out and set the valve timing on the right hand cylinder. (The engine has a camshaft for each cylinder bank). Then I will pull the cylinder head off and put a dial indicator on the piston so I can set the spark timing up to occur exactly when the piston is at top dead center. The right cylinder has good compression, and the engine has "loosened up" considerably from running. I have tried a couple of different sparkplugs in that cylinder, and it makes no difference. Other folks have had better results with this style of engine, so I don't think that the problem has anything to do with the engine design.
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Vehicles & Models / Re: Pennsylvania A3 Switcher (Kozo)
« Last post by jirvin_4505 on October 04, 2022, 11:07:56 PM »
Love the detail in your pictures. Big is good
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Your Own Design / Re: Chris's Build of Steering Engine
« Last post by crueby on October 04, 2022, 10:53:45 PM »
Got my pics off the camera, and put together a compilation of video clips of the Lombards trundling around. In the first clip, we were heading down the hill to pick up a load of wood using the Lombard dump truck. Note the heads poppping out of the re-enactor tents (was first thing in the morning) as they heard us coming around the corner.  At the end is a clip from the belt driven machine shop, they had just gotten the big shaper running and were taking down the surface on an engine head (scrap one, for practice)

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Vehicles & Models / Re: 2" Minnie Traction Engine
« Last post by Kim on October 04, 2022, 10:44:39 PM »
Great to see an update on your Minnie!    :popcorn: :popcorn:

The gears look great!  And your solution of using the RT on the mill for the rear wheels seems like a good solution to me.

Keep the progress coming!
Kim
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Tooling & Machines / Re: G. Thomas Versatile Dividing Head (Hemingway Kits)
« Last post by Kim on October 04, 2022, 10:36:22 PM »
That looks like a fun (and potentially useful) project!  :popcorn: :popcorn:

Kim
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Vehicles & Models / Re: 2" Minnie Traction Engine
« Last post by packmule on October 04, 2022, 09:40:44 PM »
Few more pictures for you.
 After fitting the hornplates I set about the bearing blocks for the various shafts. These were all cut from solid steel milled down to size  and shaped on rotary table. Rather than have steel on steel I fitted bronze bushes to all. Just for inspiration I fitted the various gears, winding drum, brake drum and the front end. Quite pleased with the look so far.
Now its the rear wheels. Bit of a disaster in a way in that the castings are 10mm too big for the lathe so its off to the mill.
I glued 2 pieces of 12mm ply and cut a disk larger than req'd to take the rim, bolted to the rotary table and fly cut the top to make it flat. That done it was a case of bolting down the rim and centering. Lots and lots of light cuts and we are getting there but its slow going.
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Tooling & Machines / G. Thomas Versatile Dividing Head (Hemingway Kits)
« Last post by samc88 on October 04, 2022, 09:37:46 PM »
A nice tooling project on the bench now, been looking into one for ages and got some jobs coming up in the future where I would benefit from one. The George Thomas design looks like it should fit my needs perfectly, especially with the micro attachment as well which allows practically any division. Not sure when Ill actually start this as want to sort other things out first but anyway heres some pics of what comes in the box. My first job was to sort through everything and label up the material in the kit and compare to the material list. I find it much easier to find the correct material when sifting through the box this way. The kit also has excellent drawings, Im also going to be working from the book "workshop techniques by G Thomas" which has good build notes in there.
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