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| New Compressed Air Hit n Miss Engine |
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| cfellows:
I've begun work on a new, hit n miss engine that will run on compressed air. It has a 1" x 1.5" bore and stroke with a 7" flywheel. Two to one cam gearing is incorporated to run in 4 stroke mode like the old engines. This engine is an inverted type, a design which allows the builder to use a much simpler, end-mounted crankshaft and a single, large flywheel. It should be an easy engine to build. I'm using a new, quick release valve that will allow the engine to run in true hit n miss mode and should sound very much like it's larger, internal combustion counterparts, as in loud! Even tho the engine is pretty large for compressed air, it will be run at full compressor pressure and should only "hit" about every 8-10 revolutions not requiring much air. Here is a picture of the mostly finished design. Still have some details to add like the governor assembly and the innerworkings of the valve. I am designing this engine for others to build as well, so I'll provide drawings when they are finished. Chuck |
| saw:
This engine looks very intressting. I will be follow this project with great intresst. :thumbup: |
| Rob.Wilson:
Interesting design Chuck :med: Looking forward to seeing the engine take shape :dremel: Rob |
| NickG:
Love the vertical configuration Chuck - will be an interesting build this :thumbup: |
| cfellows:
Thanks for the kind words, folks. I do appreciate the interest and the comments. Got started on the build this weekend. The uprights are formed from 3" x 3/8" thick hot rolled steel, each 6" tall. Most of the work was done with my metal cutting bandsaw and vertical belt grinder. I did use the milling maching to clean up the edges and form the inside radiuses at the top and the bottom. I've included pictures with two different flywheels. I'll probably use the larger, 7" cast iron fly wheel that I had originally planned for but also kind of like the smaller, 6" brass flywheel that I had milled from solid several years ago. I guess I'll keep the option open until I get further along. Chuck |
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