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Message-ID: <5cf132c0711220604o2a3e9befx498a187f269dbd91@mail.gmail.com>
Date: Thu, 22 Nov 2007 07:04:51 -0700
From: "Mark Steitle" <msteitle@gmail.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Fw: [Bulk] 16x
In-Reply-To: <list-2500637@logan.com>
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References: <list-2500637@logan.com>

Ed,
How many flight hours does your engine have on it since last rebuild?

Mark

On Nov 22, 2007 5:45 AM, Ed Anderson <eanderson@carolina.rr.com> wrote:
> Thanks, George, that in indeed interesting information.  Long throw should
> mean more torque.  Be interesting to see how they have improved the sealing.
> Two years more development then all the production (assuming they go forward
> with it), so I should expect to see it for at least 5 years.  Well,
> hopefully the old 13B will hold out for that long.
>
> Ed
>
> ----- Original Message -----
> From: "George Lendich" <lendich@optusnet.com.au>
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Sent: Thursday, November 22, 2007 1:51 AM
> Subject: [FlyRotary] Fw: [Bulk] 16x
>
>
> >
> >
> >> Ed, Lynn and Bill +
> >>
> >> This was posted to me privately and may help to clarify the
> >> specifications of the 16x. Some of the info are estimations by Rolf
> >> Pfeiffer ex - NSU engineer.
> >>
> >>> Hello George
> >>> Nice to hear from you. Here is my assessment:
> >>
> >> Also info supplied by Don Sherman as follows:-
> >>
> >> I interviewed Seiji Tashima, the engineering expert for Mazda's new
> >> rotary, at Tokyo on your behalf. Here are a few details he revealed:
> >> Rotor width reduced by 5mm saves weight, improves apex seal performance
> >> trochoid is 25mm wider, 35mm taller for more displacement and torque
> >> would not reveal increase in eccentricity. New displacement is
> >> 800cc/rotor.
> >>
> >> Aluminum end plates have plasma-sprayed wear surface direct and indirect
> >> fuel injection.
> >>
> >> Torque gains come from longer e-dimension, more displacement, and direct
> >> injection.
> >>
> >> He would not confirm 300 hp power goal.
> >> All the gas seals are improved,  with smaller flame holes adjacent to
> >> spark plugs.
> >> The 16x engine ran for the first time this year, full development will be
> >> at least 2 more years.
> >>
> >> Engine weight is reduced from 125kg [275 pounds] to 100 kg [220 pounds].
> >>
> >> Assessment by Rolf Pfeiffer as follows:-
> >>
> >>> /Now, using above dimensions we get the following:
> >>>
> >>> 25 mm wider means the short axis goes from 180 to 205 mm.
> >>> 35 mm taller means the long axis goes from 240 to 275 mm.
> >>>
> >>> This results in E = 17.5 mm, and R = 120 mm.
> >>> The old dimensions were E = 15 mm and R = 105 (including the radius of 3
> >>> mm for the apex seals).
> >>> The ratio R/E is 6.857, down from 7.0.
> >>>
> >>> The ratio of stroke to piston area becomes higher which is what they
> >>> want, I suppose.
> >>> The RX7/8's were 0.33 S/D, above numbers would be 0.3764, a substantial
> >>> 14% improvement in ratio of stroke to equivalent piston diameter. A long
> >>> stroke engine, so to speak.
> >>>
> >>> I also had stated that:
> >>> NSU also went that direction with their latest developments before
> >>> folding.
> >>> We are lucky that Mazda has the financial means and does carry on.
> >>>
> >>> The last big NSU unit EA 871 was approximately like this: (Calculating
> >>> back from its displacement and width. I had already left by then, so the
> >>> info is calculated.)
> >>> E = 17.28, R = 120.5, width = 69 (given), displacement = 746.6 cc
> >>> (given).
> >>> This is very close to what Mazda seems to be doing now, if above numbers
> >>> are right.
> >>> NSU had great hopes in that engine. It was used in a German fan-liner.
> >>> It was the high point of the Wankel development at NSU.
> >>> Then the money did run out. NSU was merged with AUDI, and VW the parent,
> >>> killed it all. All further development was stopped.
> >>>
> >>> Fan Trainer:
> >>> http://www.der-wankelmotor.de/Flugzeuge/RFB/rfb.html#Fanliner
> >>>
> >>> Regards
> >>> Rolf
> >>>
> >>>
> >>> George Lendich wrote:
> >>>> Rolf,
> >>>> Could you give me your assessment of the new 16X eccentric. If I
> >>>> remember correctly you gave you assessment on Paul's site. There is
> >>>> discussion on another site and I would like to pass it on to interested
> >>>> parties.
> >>>> Also if my memory serves me right, you mentioned a manufacturer was
> >>>> working on a similar size ( change in eccentric) and what company that
> >>>> was.
> >>>> Am I wrong to believe it was the company you were working with at the
> >>>> time?
> >>>> George Lendich
> >>
> >
> >
> > --
> > Homepage:  http://www.flyrotary.com/
> > Archive and UnSub:
> > http://mail.lancaironline.net:81/lists/flyrotary/List.html
> >
>
>
> --
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>