IHC Mogul Castings Q. Tom Meahl, RR 6, Box 114, Seymour, IN 47274 writes that he and his father have built several models from castings, and are now ready to try and make their own castings. They would like to start on a 4 or 6 HP IHC Mogul model, and would like to know about original drawings, and how modelmakers develop the drawings.
A. We know that at least one GEM reader and modelmaker has developed castings for the Mogul-Mr. George Scott of Outlook, Montana. Since George scaled his model from my 8 HP Mogul, I have a good idea of how it was done. Much of the work was done from photographs in which I was able to draw in specific dimensions so that the remaining dimensions could then be scaled. Other modelmakers begin with graph paper and establish certain base dimensions, drawing in other details as the measuring process continues. It is by far the easiest way to have an engine on hand that can be partially dismantled so that each piece can be measured and scaled. Then remember too, that it is virtually impossible to keep certain parts in exact scale owing to the strength required.
Fairbanks-Morse 'N' See photo MM-1 illustrating my Fairbanks-Morse 'N' engine. It started as a set of castings from George Scott. It is built with a hit-and-miss governor as well as a mechanically actuated fuel valve that allows the engine to be run on propane. Presently the governor is set for 375 rpm. The thermosyphon cooling system is quite effective. At present I am building a ? scale Rider-Ericcson hot air engine and a small steam engine. Dale Hoxie, RFD 3, Box 177A, Stonington, CT 06378.
Freelance Models Forty years ago my wife gave me a Craftsman 6 inch lathe which cost $57. With it I made the steam engine in MM-2, a two-cycle, and the four-cycle vertical shown in MM-3, also the horizontal engine illustrated in MM-4. It is about 8 inches long and 4? inches tall. Made of alumninum stock and bar steel, it has a 1 x 13/8 inch bore and stroke. The stainless steel sleeve has water entirely around it. An unusual feature is that the governor mechanism is on the right side and is fed through the block to the lockout mechanism on the left side. This was done in order to keep the flywheels equidistant from the center of the engine frame. Ignition is supplied by a motorcycle coil and battery.
I am presently building a steam engine entirely from stainless steel. Building these engines from scratch, using scrap metals has been very enjoyable and challenging. Robert J. Bauer, 1306 Elmwood, Gainesville, TX 76240.
Maytag Model Norman Brockelsby, 909 W. North Front St., Grand Island, NE 68801 sends us some photos of his latest creations. MM-5 shows Norman holding up his half-scale model of the two-cylinder Maytag engines, and MM-6 gives a size comparison between the original and the model. The little engine uses points inside the flywheel, 10 mm spark plug, and a cast iron cylinder and piston rings. MM-7 shows a small light generator using castings and old alternator parts.
A CLOSING WORD
At the last minute we received additional information on 24/3/5, identifying this as an Iron Horse engine. It is very interesting to note that there are a substantial number of these fine little engines still around, and we are pleased that quite a few of our collectors have taken an interest in them.
Our compliments to all the readers who sent in articles and photos for the Modelmaker's Corner this month. It's nice to know that model making is gaining more and more momentum within our hobby, and we hope to hear from more of you at your earliest convenience. Curiously though, we have yet to hear from anyone who has castings for a Corliss steam engine of larger dimensions than Cole's 1?x 2? inch size. Having seen a couple of these, the Reflector concluded that the dimensions were a bit small-in fact, small enough that some of the parts nearly get down to fine instrument work, and ye olde Reflector isn't enough of a machinist to make small and fragile parts. Perhaps we'll have to follow the lead of some of the modelmakers noted above who have fabricated engines 'from the solid.'
The purpose of the Reflections column is to provide a forum for the exchange of all useful information among subscribers to GEM. Inquiries or responses should be addressed on: REFLECTIONS, Gas Engine Magazine, P. O. Box 328, Lancaster, PA 17603.