The Mazda Rotary (twin-rotar) engine that is, not me ...
http://www.new-car-net.co.uk/Mazda_news.html?id=6881
http://www.mazda.com/mazdaspirit/rotary/
Many happy returns
The Mazda Rotary (twin-rotar) engine that is, not me ...
http://www.new-car-net.co.uk/Mazda_news.html?id=6881
http://www.mazda.com/mazdaspirit/rotary/
Many happy returns
"A woman without curves is like a road without bends, you might get to your destination quicker but the ride is boring as hell'
Happy birthday I guess...
Lack of charisma can be fatal.
Visca Catalunya!
Hooray for Rotary!!!!
Honor. Courage. Commitment. Etcetera.
What happened to the "Pistons are so overrated" picture with the 787B in the background?
Happy birthday. It's a shame we don't use the rotary much.
The NSU spyder is already 44...
"I find the whole business of religion profoundly interesting, but it does mystify me that otherwise intelligent people take it seriously." Douglas Adams
has anyone tried to make a diesel rotary?
Andreas Preuninger, Manager of Porsche High Performance Cars: "Grandmas can use paddles. They aren't challenging."
i wonder if it would be worthwhile - or possible?
i was just thinking that it might deal with the rotary's flaws of fuel consumption and low torque, while being a high revving diesel?
Andreas Preuninger, Manager of Porsche High Performance Cars: "Grandmas can use paddles. They aren't challenging."
one of the problems of the engine has always been the sealing of the edges of the rotor. Diesel engines need no ignition system, but work on high compression. I am afraid that applying this same high compression in the wankel chambers will again put problems to the seals.. (if this is bare nonsense I'll be the first to stand corrected )
"I find the whole business of religion profoundly interesting, but it does mystify me that otherwise intelligent people take it seriously." Douglas Adams
Andreas Preuninger, Manager of Porsche High Performance Cars: "Grandmas can use paddles. They aren't challenging."
I am
You only get one seal with a rotary unlike a piston which may have up to 3 , each doing a different job. The rotary apex seal has to do all.
Next .... Apex seals don't have a flat wall to seal to, so harder to start with and on top of that pressure causes a seal to flex which opens up the seals. So for higher compression you need VERY high tip forces. WHICH sadly increases friction losses and wear. Thsi then means it's not possible to use radial intake/exhaust and must use side ... which creats more of an issue with sealing on the rotor edges
hence all why turbo charging a rotary tends to require expensive parts and regular replacement !!
and finally .... wankel compression ratios are determined by the chamber SHAPE. Not the stroke as in Otto. So in practice 10:1 is about the limit though Japanese designers have surmised a theoritical 15:1 ("Rotary Engine" - Kenichi Yamamoto)
"A woman without curves is like a road without bends, you might get to your destination quicker but the ride is boring as hell'
so ..it's not really possible with current tech?
Andreas Preuninger, Manager of Porsche High Performance Cars: "Grandmas can use paddles. They aren't challenging."
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