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Home-Built 1/4-Scale Model Of 1912 Red Wing "Hit And Miss" Engine
I enjoyed building this 1/4-scale model of a 1912 Red Wing 5 hp "hit and miss" engine. It runs well with ignition provided by a Ford buzz coil and a spark plug.
I bought the castings and the finished timing gears from an acquaintance, who had purchased the casting kit from a mail order company. He had
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Home-Built 1/4-Scale Model Of 1912 Red Wing Hit And Miss Engine ENGINES Engines I enjoyed building this 1/4-scale model of a 1912 Red Wing 5 hp hit and miss engine It runs well with ignition provided by a Ford buzz coil and a spark plug
I bought the castings and the finished timing gears from an acquaintance who had purchased the casting kit from a mail order company He had already machined the flywheels the cylinder head and most of the cylinder block
The piston was the first part that I machined using an extruded cast iron blank that came with the kit The finished 1 1/4-in dia piston had to be 002 in smaller than the bore and the ring grooves a very close fit to the two piston rings provided The 5-piece crankshaft was made from steel stock and is press-fit together The connecting rod is tapered and the ends silver-brazed on The intake and exhaust valves are identical The stems consist of drill rod with the stainless steel faces silver-brazed on with Harris Safety Silv 56 The valves are lapped to the seats I machined the mixing valve carburetor from a brass casting that came with the kit
The most challenging part was making two very small holes intersect inside the tiny casting A little JB Weld bailed me out here The brass castings for the governor were finished by hand
The engine has a 2-in stroke and a 1 1/4-in bore with a displacement of 2 45 cu in The engine develops about 1/10th hp at 300 rpm s
There s a brass sheet metal gas tank inside the base casting The water hopper holds about a cup of water and the oiler holds a teaspoon of oil The main bearings and the big end of the connecting rod are lubricated via grease cups that I bought
All the machining took about 300 hours and the assembly took another 10 hours or so I mounted the engine on an oak skid that bolts down to the floor of a homemade miniature hay wagon which I pull around at antique tractor shows John Magnuson 4640 Ensign Ave N New Hope Minn 55428 ph 763 533-5787; magnu@msn com
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