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Offline JETZcorp

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Doyle Rotary Engine
« on: March 31, 2011, 09:08:34 PM »
I stumbled upon this a few months ago on YouTube, and now they've just released a new video which is pretty interesting.  I was wondering what you guys thought of this idea.  Bit of a pain to wrap your mind around the concept, but it's quite elegant, in a way.

The Doyle Rotary Engine


Is this Maico a 440 or only a 400?  Well in all the confusion, I forgot myself.
But considering this is a 1978 Magnum, the best-handling bike in the world, you have to ask yourself one question.
Do you feel lucky, punk?

Offline snowboarderro

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Re: Doyle Rotary Engine
« Reply #1 on: April 01, 2011, 03:42:12 AM »
to many moving parts :P

Offline TMKIWI

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Re: Doyle Rotary Engine
« Reply #2 on: April 01, 2011, 01:33:47 PM »
And people think 4 strokes are complicated. :o
Imagine that mass spinning on your bike going up a ramp. :-X
If you don't fall off you are not going hard enough

Offline JETZcorp

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Re: Doyle Rotary Engine
« Reply #3 on: April 02, 2011, 03:13:25 AM »
Per unit displacement, rotating mass is dramatically less than a four-stroke, or at least so they say.  The only thing complicated about this is the number of pistons, but there are far fewer moving parts than a four-stroke of similar displacement, because as in two-strokes and Wankels, everything is controlled by ports rather than valves.


Is this Maico a 440 or only a 400?  Well in all the confusion, I forgot myself.
But considering this is a 1978 Magnum, the best-handling bike in the world, you have to ask yourself one question.
Do you feel lucky, punk?

Offline SachsGS

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Re: Doyle Rotary Engine
« Reply #4 on: April 02, 2011, 08:43:00 AM »
There was a British truck manufacturer that back in the 50's used a sleeve valve reciprocating gas engine.