MODEL BUILDERS SECTION-


| May/June 1955



Outstanding piece of work

An outstanding piece of work done by Mr .A. C. Otto of Sandwich, III.

A. C. Otto

Sandwich, Illinois

I am enclosing a photograph that we are proud of. They represent many months of hard work.

The first project we built was the miniature train which many of your readers have seen and rode in. This was first started in 1943 and completed in 1951. This was winter work. The engine is a 4-4-4 with a 3x4 bore and stroke. Wheel gage is 14', riveted boiler with the exception of the firebox, boiler pressure is 150 P.S.I. Engine is complete with air pump, air brakes and electric lights. It has automatic bell ringer and a deep toned chime whistle that we built. We have four cars which carry eight adults each and as you have see at Pontiac many times we have had as many as forty-five persons aboard. Yet this engine always starts its load with the greatest of ease.

A couple years ago we decided to build a six inch scale model of a Case traction engine. We are very proud of this little girl as you do not have to stretch your imagination to know that we were duplicating. I would like to see more good models made as I think people get a big kick out of the models and the nearer they are to perfection the better people like them. I have seen a few very good models in your magazine, some of which were very good until they got to the wheels. There they went astray and used what they could find in the junk pile or if they were built did not stick to the original pattern. We have a pattern for every casting on this engine with the exception of the governor which is a Gardner. The bunkers are built exactly as the originals being riveted as they were. The boiler which is the heart of the engine is built regulation to the ASME boiler code. The barrel is AS53 Type B seamless pipe, the rapper sheet, throat sheet and rear boiler head is AS285 C Flange steel, the firebox is of all welded construction of firebox plate and stress relieved. Staybolts are of the screwed and riveted type. The boiler is riveted together as was the old man. We carry 150 PSI.

A word of warning to you handy boys about boilers. In most states today it is required that a pressare steam boiler be built by a certified ASME builder and stamped with the clover leaf emblem. If you build your own boiler out of this or that you may be disappointed when the State Boiler Inspector says that you cannot put fire into it. Better read the 1952 edition of the American Society of Mechanical Engineers on power boilers.