Simple see through Oscilator

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Tin Falcon

Tin Falcon

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Here are the plans that really got this hobby moving forward for me. I had started two engines before this one only to let them sit for a while. This one was started and finished in about a week of spare time. It is an Ed Warren Design. This engine is not only the first engine I completed and got running it has inspired me to design my own engines.
It calls for Lucite but metal can be substituted. Of course it loses it's charm of being a see through engine when metal is used.
lucyplan2.gif



This was downloaded from the now defunct Model Tec web site. Ed Waren If you are out there contact me. I want to share this on a not for profit basis with fellow model engineers. or just say so and this will disappear.
Happy machining
Tin
 
How's the wear of plastic cylinders? How long will it last?
 
I work with acrylic frequently. By work I mean make parts and shavings while I slowly learn to use my taig properly. No completed projects yet. I'm making one of these and was thinking of using acrylic for the flywheel, but increasing the diameter and fit it to a piece of thick wall copper tubing for more mass. I will complete this one. There it's in writing so I have to complete it.
 
How's the wear of plastic cylinders? How long will it last?
Click to expand...

I have had a steel piston in a plastic cylinder and have had and run the engine for ten years.
Tin
 
Every time I try to work lucite it comes out cloudy. What's the trick to getting it clear ?
 
wet sand 320, 400, 600 then auto compound and finish with plastic polish.
Tin
 
I have a huge piece of round acrylic I've been experimenting with and red compound on a buffing wheel does real nice too. Pics when I get time.
 
Fine sand paper and clear acrylic varnish will do the trick.
 
the other option is flame polish . you can srape the edges smooth then hit with a torch lightly. You tend to get some distortion as the corners heat faster than the middle of an edge.
soo would not use this method on the the cylinder .
Tin
 
Lubricating with a strong detergent water mix helps, but can rust your machine. I've been thinking about trying a glycol ether or glycerine. Petroleum product cause stress fractures at worked surfaces. Green (CrO3) buffing compound works as a great final polish after using the sandpaper.
 
A while back i made a cylinder from a piece acrylic that I salvaged fro a shower it was towel bar. I cleaned it with Iosopropyl Alcohol it developed crack faster than you can say crackled marbles.
Tin
 
Glycol ethers probably have the same effect. I was never good at that long molecule chemistry stuff.
 
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