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From: "George Lendich" <lendich@optusnet.com.au>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-2713495@logan.com>
Subject: Re: [FlyRotary] Re: Rotary within a rotary
Date: Mon, 4 Feb 2008 07:18:51 +1000
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Yep Ed!,
Sealing is another issue - there must be a hundred thousand designs out 
there which would be wonderful designs if only they could be sealed 
adequately.
Some of mine included.
George ( down under)

> Interesting indeed, Al.  Two things catch my attention - the inside looks 
> a bit complex - is reliability and how you get rid of the internal heat. 
> But, it looks like they are aware of the challenges and have identified 
> durability and heat management as two challenges.
>
> However, I must agree -  the chances of it seeing production are slim and 
> non.  I mean even with the resources of a Mazda/Ford company - its still 
> appears to me that the future of even the rotary is not for certain.
>
> Ed
>
>
>
>
> ----- Original Message ----- 
> From: "Al Gietzen" <ALVentures@cox.net>
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Sent: Sunday, February 03, 2008 11:10 AM
> Subject: [FlyRotary] Rotary within a rotary
>
>
> Forward:
>
> A very interesting engine concept.  BSFC of .28 - wow.  Be sure to 
> checkout
> the animation.
>
> Subject: REFLECTOR: Engine Answer?
>
> We've seen so many too-good-to-be-true alternative engine technologies 
> that
> we roll our eyes whenever we see the next one. One that has potential to 
> be
> a bit different is the legacy engine effort, being worked on at Oak Ridge,
> TN with technical support of Oak Ridge National Lab and University of
> Tennessee and some decent (if inadequate) money behind them.  It has 
> aspects
> of a rotary engine and Wankel but is designed to run of heavy fuels, such 
> as
> kerosene.  Hallmarks:
>
> *  An increase in efficiency of approximately 16% over an equivalent
> crankshaft engine
> *  Potential for greater than 1.6 hp/lb
> *  Potential for 200 hp/ft3 of installed volume
>
> While the efficiency improvement over a crankshaft/recip engine is modest,
> its biggest asset for aircraft (which they have not even thought about) is
> the energy density.  A 300hp unit would weigh 188# and be about 15" 
> diameter
> and about 15" long.  As can be seen from the website,
> http://www.legacyengine.com/home/index.php?option=com_frontpage&Itemid=1
>
> they are as much into finding partners and investors as they are about
> explaining the technology--not a good sign, but also not unusual for a 
> start
> up.  They don't intend to manufacturer the engine, simply develop and
> license the technology.
>
> Anyhow, I would give it a 2%-3% chance of ever seeing the light of a
> commercial day, but if it did, even if it fell a tad short of its
> performance specs, what an awesome aircraft engine--using heavy fuels at
> that.
>
>
>
>
> --
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