3302 Sharon Ave., Cincinnati 41, Ohio
Enclosed a little item about 'hot air' engines. I note that you have carried pictures of the larger ones from time to time. I felt that some of your readers might want to make one for themselves.
I have got many hours of solid pleasure out of the ones that I have made. Gave them to my children, grand-children and to some close friends. If there is a charge for running this item, send me the bill. I will pay it. Also might want to condense it and run it as an ad. Have a machinist who makes parts for me that will make them for the trade.
Respectfully, Walter N. Huff
Here is a cute little 'Hot Air' engine that the average handyman can throw together at a very nominal cost, and in a very few hours. A soldering iron or torch, a pair of tin snips, electric drill and ordinary shop tools are all that is needed to do the job. A couple of tin cans and some other little odds and ends that can be had at any modern hardware store, will cost less than $6.00, paying top retail prices.
Runs nicely on fuel alcohol or 'canned heat'. Will get hot enough to run in less than two minutes and will turn up to 500 rpm. It is a very interesting conversation piece and is fascinating to young and old alike. Engineers have asked 'What makes it go?'
Generating cylinder is 1 brass (tail-pipe) used under sink or washbowl, length 5'. Gland made from 1 iron pipe plug. Displacer piston fabricated of thin aluminum sheet, 13/8' 3' long. 1' stroke.
Power cylinder is copper water pipe. Piston machined from 3/8' iron pipe, cap. stroke.
Disc is sawed from 1' shaft, ' wide. Crankshaft is 3/16 welding rod. Flywheel, 10 oz., a pulley from a toy or can be ordered from a model engine supply house. 3' diameter. Connecting rods, 1/8 and 1/16 brass welding rod.
Tin cans are: one pint size with screw cap generally used for fuel alcohol, turpentine or J-wax. Burner is made from top of J-wax can. Fire box made from bug spray can. (Be sure pressurized can is exhausted before drilling or cutting.)
If any of your readers should decide to build one of these little engines and need more detailed information, please feel free to write to me. I will answer all letters. Enclose self-addressed, stamped envelope. Walter Huff, 3302 Sharon Ave., Cincinnati 41, Ohio.