Has anyone seen plans for a scale wankle rotary engine?

[itsme]

Hi there,

The plans that I used for the engine that I built were roughly based on the SW92 plans that are available from www.vth.de . In the end, my engine resembled the SW92 externally, but internally it was quite different. I used a proper epitrochoid, where the SW92 used an oval. I didn't ever make 'formal' plans for the version that I made.

If you do decide to try and make an engine, pay particularly close attention to the apex seal and spring arrangement and make sure your fixed gear is solidly mounted and generally robust. These were the two areas that I had the most trouble with. If I were doing it again now, I'd also avoid the aluminium side housings that I used and rather go with steel or cast iron.

Those plastic models are great to get a feel for how the geometry works and how the engine generally fits together, but when it comes to the finer details, they're probably not the best things to copy.

Regards
Warren

[jgro]

Someone earlier in this thread aked what happened to Wankels from the 60's and 70's. I happen to have one in a '71 Arctic Cat Panther snowmobile that I'm restoring. I took some pictures of it as I tore it apart so that I would know how to put it back together again. Enjoy!

jgro

[polarit]

Funny thing with the wankel engines - sometime whole lives revolve :-) around them.
when i was born in mid-sixties my father was working in stuttgart at the NSU plant, with the apex seals.
When i was 2 cents high, i was transported around in first a NSU Spider, and later a RO-80

A historical info : when NSU drivers met at the highways in germany, they saluted each other with a raised hand, showing a number of fingers.
each finger represented a engine change.

and now - wouldn't it be nice to build one myself, just for the bragging rights.

...might finish the cnc mill first thou.......