Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines
The Regular Stuff: Chat, Buy, Sell, Off Topic, etc. => General Discussion - Scale Model Gas Engines - Hit & Miss - Throttle Governed - Non-Compression – etc => Topic started by: Adirondack Jack on September 07, 2020, 08:40:41 pm
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The main line shaft and it’s drive wheel, a floating input jack shaft, tensioned by engine positioning, and two hand sewn belts made from 3D printer drive belt material.
The belts I sewed using 4-0 nylon suture needle and thread, after tacking the belt ends together with thick CA.
The pulley wheels are maple, everything else is 1/8 Baltic birch ply. The shafts each run on two ball bearings in pillow blocks made with a scroll saw and fly cutter to do the bearing bores.
I set it up tonight, wedged the intake valve open a crack to keep the engine from pumping fuel, and gave it all a spin by hand. Everything looks happy enough to go forward with a docking “sled” to position the engine and tension the input belt.
As you can see, it’s a true kitchen table project. One of the perks of living solo.
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Very nicely done there , good craftsmanship exuding from that functional and beautiful pulley system.😊
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Just don’t look too close at the drive hub on the engine. I roughed it out with a slight taper, and left it rough as a cob because it’s only 1inch diameter, and it was either allow grip or add tension. I chose grip. Grin.
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All looks fine to me, a wonderful idea to load the engine up.
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All my life I’ve been interested in old things or models of old things. The only condition? They must function. When I rescued a nearly 150 year old rifle that had been in a museum for fifty years, I shot it, and sold it to a guy who took a bison with it. I have no use for wall hangers. The engine has to do work. That’s what they’re created for.
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Yes I agree that engines should have work to do.