Hi Ross Whether it is a good idea or not remains to be seen.
Please keep in mind that the Mü 31 is only a student research project. Its existence should not be seen as an indication that a high wing design is beneficial in terms of performance. In fact there are very significant aerodynamic disadvantages with this concept and one of them is the huge amount of parasite drag on the underside of the wing/fuselage junction. There are others too, and it is high noon that this hype comes down to a more rational level. Please don’t think for a moment that the move away from the early high wing designs on composite gliders wasn’t made for very good reasons. Kind regards Bernard > On 29 Dec 2017, at 8:16 am, Ross McLean <ross...@bigpond.net.au> wrote: > > And yet the European manufacturers have ignored their own research for so > many years. > It took the South African Jonkers brothers to put it into production again > with their outstanding 15m/18m JS3 Rapture. > Now suddenly the Akaflieg have realised it was a good idea after all. > ROSS > _________________________________________________________________________________________ > > Ross McLean > Mobile: + 61 488 270 105 > Telephone: + 61 7 4325 4771 > > From: Aus-soaring [mailto:aus-soaring-boun...@lists.base64.com.au > <mailto:aus-soaring-boun...@lists.base64.com.au>] On Behalf Of Peter Champness > Sent: Thursday, 28 December 2017 5:37 PM > To: Discussion of issues relating to Soaring in Australia. > Subject: Re: [Aus-soaring] ASG29R > > I attended a talk by Gerhard Waibel about 10 years ago (or maybe 15 years > ago). > > Among other things he talked about the wing fuselage intersection drag. His > idea was to raise the wing on a thin pylon more than 200mm above the > fuselage and then support the wing with struts! I thought that was really > reinventing the wheel. But he was right. Here we go. > > On Thu, Dec 28, 2017 at 8:22 AM, Mike Borgelt > <mborg...@borgeltinstruments.com <mailto:mborg...@borgeltinstruments.com>> > wrote: > Yes, as Bernard said there are other composite sailplanes with high wings. > Phoebus C, Std Jantar 2/3, ASW 15. > > However have another look at the Mu 31, the fuselage cross section in > particular where at around pilot shoulder height it necks in. This is more > like the Weihe, Meise (Olympia), Slingsby Sky, early Slingsby Skylarks etc. > > Mike > > > > > > > > the At 01:08 PM 12/27/2017, you wrote: > > Not just new wings (same sections though ) but extensive changes to fuselage > also so I think a new model number is warranted. Better for sales anyway. > Wouldn't surprise me if the EB29R is further modified and becomes the EB30. > Looking at the R wing at Benalla it didn't really fit the old root fairings > on the EB29. > > Funny thing is some of the wooden gliders of the 30s, 40s and 50s had similar > wing locations and mounting of the wings on a pylon integrated into the > fuselage. Didn't have the fancy wing root design as they didn't have the CFD > codes or computers then. > > Somewhere I have a paper on the Mu31 where they say they hope to get 6 to 10% > drag reduction with the wing location. We should know soon as it won't be > hard to find a good ASW27 and do comparison flights. > > Before anyone gets too excited this is all pure speculation on my part but if > the comparison tests show they are getting what they wanted........ > > Mike > > > > > At 12:43 PM 12/27/2017, you wrote: > > Content-Language: en-US > Content-Type: multipart/alternative; > > boundary="_000_PS1PR04MB1004D9231BF7DE336AFA7056A2070PS1PR04MB1004apcp_" > > Hearing that this will be the glider that combats the V3 & JS3; new wings for > the very popular ASG29, the R is for Racing - perhaps a play on the > intimidating EB29R? > > > > > > "ROCKS" ? > Looks like Butch had a good time in the V2 aswell. > Jim > > > > > >> what does that mean?? > _______________________________________________ > Aus-soaring mailing list > Aus-soaring@lists.base64.com.au <mailto:Aus-soaring@lists.base64.com.au> > http://lists.base64.com.au/listinfo/aus-soaring > <http://lists.base64.com.au/listinfo/aus-soaring> > > Borgelt Instruments - design & manufacture of quality soaring instrumentation > since 1978 > www.borgeltinstruments.com <http://www.borgeltinstruments.com/> > tel: 07 4635 5784 overseas: int+61-7-4635 5784 > mob: 042835 5784 : int+61-42835 5784 > P O Box 4607, Toowoomba East, QLD 4350, Australia > _______________________________________________ > Aus-soaring mailing list > Aus-soaring@lists.base64.com.au <mailto:Aus-soaring@lists.base64.com.au> > http://lists.base64.com.au/listinfo/aus-soaring > <http://lists.base64.com.au/listinfo/aus-soaring> > Borgelt Instruments - design & manufacture of quality soaring instrumentation > since 1978 > www.borgeltinstruments.com > <http://www.borgeltinstruments.com/>tel: 07 4635 5784 overseas: > int+61-7-4635 5784 > mob: 042835 5784 : int+61-42835 5784 > P O Box 4607, Toowoomba East, QLD 4350, Australia > > > _______________________________________________ > Aus-soaring mailing list > Aus-soaring@lists.base64.com.au <mailto:Aus-soaring@lists.base64.com.au> > http://lists.base64.com.au/listinfo/aus-soaring > <http://lists.base64.com.au/listinfo/aus-soaring> > > _______________________________________________ > Aus-soaring mailing list > Aus-soaring@lists.base64.com.au <mailto:Aus-soaring@lists.base64.com.au> > http://lists.base64.com.au/listinfo/aus-soaring > <http://lists.base64.com.au/listinfo/aus-soaring>
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