R/C Tech Forums - View Single Post - "Thump-8" 4 stroke 1/8th scale engine

09-06-2009 | 03:22 AM

#59

Eccentric

Tech Regular

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Joined: Dec 2006

Posts: 394

From: Northwestern Wyoming

Quote:

Originally Posted by dieselpilot

Take a look at one.

http://www.google.com/patents?id=zcY...age&q=&f=false

http://tech.flygsw.org/ys91.htm

If you guys haven't studied the history of model airplanes engines you are missing out on a lot of interesting designs. Think the RCV concept is original? it was done by a German company in the 70's. Four stroke with reed valved crankcase supercharging and Aspin valve, Webra early 80's, though the engine wasn't strong at all.

I bumped into this today.

http://www.youtube.com/watch?v=eJlE-1dmEak

Greg

Interesting. The YS I looked at years ago had a roots type supercharger on the back of it (as did a supercharged OS I saw around the same time)....not that air chamber thing on the engines you linked to. Realy cool stuff you linked there. Same guy at the field also had a Webra with belt driven cams and an HB with the rotary valves. Neat. I've been into old model engines for decades. They've tried some weird stuff over the years. Always wanted to play with an OS wankel...

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