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From: "rijakits" <rijakits@cwpanama.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-983595@logan.com>
Subject: Re: [FlyRotary] Re: Diesel Operation
Date: Mon, 13 Feb 2006 19:00:52 -0500
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>
> > Bob White wrote:
> >
> > >Does anyone have an inkling of what one would have to do to get a 13B
> > >to run on diesel?
> > >
> > >Bob W.
> > >
> > Fill in the depression in the rotors to drive the compression ratio up?
> > Turbo (to drive the compression up)?
> > Add a propane charge for good measure?
> >

On "the other list" there was one gentleman working on the details for a
Jet-A conversion - I think he was looking into some outborder fuel-injection
system, that runs already direct-injection.
The idea is not to increase compression to the point of "Diesel"-ignition
(Compression ignition), but use direct-injection and spark-ignition to run
the motor.
This way you can use the cheaper and more powerful Jet-A, but the engine is
still not a real Diesel-cycle engine.
The problem is of course the low temperature needed to ignite Diesel, which
makes the engine "diesel" (pre-ignite) - I think Mistral got to around 85 hp
before it started to "diesel".
Solution: Start a spark-shower before you direct-inject Jet-A.
Problem: How do you evaporate or at least fine-distribute the Jet-A enough
to burn clean and efficient? Air-injection around the fuel-injector!!

I really hope Mistral will make their Jet-A system available seperately as
they do wit hsome other parts....
...or the gentleman from the "PL"-domaine get's it right! I think it was
Bill Jepeson, or so.....

Thomas J.