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Date: Mon, 13 Feb 2006 17:15:37 -0700
From: Bob White <rlwhite@comcast.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Diesel Operation
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On Mon, 13 Feb 2006 19:00:52 -0500
"rijakits" <rijakits@cwpanama.net> wrote:

> >
> > > 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.

Hi Thomas,

Now that you mention it, I think I remember hearing that someone was
working on it.  Like my engine install, it takes a long time for these
developments to come to fruition.

Bob W.


-- 
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