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From: "Patrick Panzera" <panzera@experimental-aviation.com>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] More rotary uses?  [FlyRotary] Titanium rotary?   [FlyRotary] Re: Big engines
Date: Fri, 6 Jun 2008 12:05:28 -0700
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Since the rotary is a four-stroke engine, energy would be wasted on the
compression stroke.

You might get away with using turbochargers for this application.

Pat

> -----Original Message-----
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
> Behalf Of Schemmel, Grant
> Sent: Friday, June 06, 2008 9:00 AM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] More rotary uses? [FlyRotary] Titanium rotary?
> [FlyRotary] Re: Big engines
> 
> 
>  What with rising energy costs, I've been kicking around an idea for
> creating a solar-thermal generator system.  If you're not familiar with
> the solar-thermal idea, it uses solar energy concentrated through a
> reflector to heat a pipe containing either oil or water in order to make
> steam.  You could use the waste heat to actually heat your house too
> (co-generation).  In looking for something on the order of a
> micro-turbine, it occurred to me that since the rotary acts like a
> turbine, couldn't you plumb it to run on steam?
> 
> I was thinking that maybe if you position the ports correctly, you might
> be able to power two sides of a rotor at once: Side A would be feeding
> steam in through the normal intake port, then exhaust out through a
> p-port somewhere around the leading sparkplug location; Side B would be
> feeding steam in through a new port somewhere around the trailing
> sparkplug and exhausting out the normal exhaust port.
> 
> I'm pretty sure this would work for one side, but I'm not so sure about
> two sides at once.  I have a '91 turbo 13B that I'm intending to go into
> a BD4 someday, but have not gotten around to tearing it down, so I'm not
> intimately familiar with Wankel timing yet.  What do those of you who
> have a lot more experience with the engine think of the idea?
> 
> Grant Schemmel
> Penrose, CO
> 
> -----Original Message-----
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
> Behalf Of Ed Anderson
> Sent: Friday, June 06, 2008 8:06 AM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Titanium rotary? [FlyRotary] Re: Big engines
> 
> Always interesting to hear of excursions from the stock 2 rotor format.
> 
>   Does anyone recall the gent who was going to make a rotary engine out
> of titanium?  As best I recall I believe he actually had a rotor tact
> welded reportedly out of titanium plate - there were some photos.  I
> doubted at the time that anything would come of it, but it was
> interesting to see what some folks are willing to tackle.
> 
> Ed
> 
> ----- Original Message -----
> From: "Ernest Christley" <echristley@nc.rr.com>
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Sent: Friday, June 06, 2008 9:59 AM
> Subject: [FlyRotary] Re: Big engines
> 
> 
> > Lynn Hanover wrote:
> >>  In this case you could machine away one face or both faces and braze
> two
> >> rotors together. One end with the gear and the other without. You
> could
> >> have
> >> twice the bearing length, and nearly twice the displacement.
> >>
> >> Just the crank, rotors and housings would be special. Everything else
> 
> >> could
> >> be stock pieces. Maybe double the torque, could be direct drive?
> >>
> > Those voices keep talking to me.
> >
> > Could you use two rotor housings, brazed then pinned on the
> compression
> > side?  Then they wouldn't really need to be special either, and you'd
> get
> > FOUR plugs per cylinder.
> >
> > Side seals would be standard, but would the apex seals have to be
> special
> > made...or could you use two of those side-by-side?
> >
> > You would have to have either a monster bridge port or a peripheral
> port
> > to feed the monster.
> >
> > Renesis rotor housings probably wouldn't work.  The side exhaust would
> be
> > to restrictive for twice the volume.
> >
> > You'd need to build a new oil pan, or use a remote sump.  Simple.
> Special
> > made compression bolts are also a cinch.
> >
> > On a guess, you'd be adding about 15lbs per rotor (?).   It could
> possibly
> > end up being a 400Hp engine with an installed weight under 350lbs(?).
> >
> > --
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