flyrotary@lancaironline.net Mailing List Archive

Wow Ed, you really need to get out more! Of course, with current fuel prices I can't say that I blame you for sitting home playing on the computer. I was just trying to get a feel for what to expect for engine life on my 20B. Mark On Nov 22, 2007 7:29 AM, Ed Anderson <eanderson@carolina.rr.com> wrote: > Lets see, Mark, that rebuilt was in 05 down in Louisiana. I fly around 50 > hours a year so, I've probably put around 100 hours on the rebuilt engine. > > Ed > ----- Original Message ----- > From: "Mark Steitle" <msteitle@gmail.com> > To: "Rotary motors in aircraft" <flyrotary@lancaironline.net> > Sent: Thursday, November 22, 2007 9:04 AM > Subject: [FlyRotary] Re: Fw: [Bulk] 16x > > > > 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 > >> > > >> > >> > >> -- > >> Homepage: http://www.flyrotary.com/ > >> Archive and UnSub: > >> http://mail.lancaironline.net:81/lists/flyrotary/List.html > >> > > > > -- > > Homepage: http://www.flyrotary.com/ > > Archive and UnSub: > > http://mail.lancaironline.net:81/lists/flyrotary/List.html > > > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html >