"Parlow, Eric (Turbos-Asheville)" wrote:

Does a diesel rotary exist?
ERic--

No. But a direct injection  turbo rotary will run
on diesel fuel. http://www.wankel-rotary.com/
Not a true diesel.

Paul Lamar

Why would direct injection be needed if spark ignition is used?

Charlie England

I suppose to get a rich enough mixture around the spark plug.
I don't really know. I notice on the web site they are also
claiming they can burn diesel without a turbo charger.
That is a bit surprising to me. I assumed the extra heat
in the intake charge due to the turbo compression  was
necessary to make the diesel fuel volatile enough to
ignite in the first place. Perhaps the secret is a high
energy ignition system. Come to think of it I did see
an intercooler on their engines. That confused me a bit at
the time.

The power and the BSFC is no great shakes. If you are thinking
of better fuel consumption forget it. If you are burning
farm fuel and not paying taxes on it that is another matter
entirely.
Paul Lamar

It's not a problem to ignite atomized diesel ( no 1, no 2, kerosene, JP-4,
JP-5, JetA) with a simple spark.
I do it all the time.  The problem comes in, in the correct timing, degrees
before TDC, on the rotary.

Paul, do you have any numbers on the power and BSFC? How many more BTUH's does
gasoline have over diesel?  Cost is about the same in my area.
In looking at that photo, the injectors are located about where the leading
plug is in a gasoline engine.
It ought to have the injectors on top of the rotor directed toward the P-Port,
so the incoming air flow crashes into the fuel stream, and mixes with it, and
surrounds the fuel droplets. At that  point the mixture is ready for ignition.

Royce

Keep working on that web site. The info is on there.
Cost for diesel fule is the same in less you are burning farm fuel. 
Then the cost is about a dollar a gallon cheaper as there is little 
or no tax. We have farmers here in SZP with tanks in the back of trucks
that also own turbo prop airplanes :-)

Paul Lamar
 
The AirCraft Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2002 All world wide rights reserved.