I see EB has essentially fit two pilots in a single seat EB29 with their EB29D ( http://www.binder-flugmotorenbau.de/eb29d-racing-doppelsitzer.html?&L=1), so I expect there is plenty of scope for improvement in fuselage size with ergonomic innovations. On 12 Jul 2014 22:34, "Harry" <[email protected]> wrote:
> Mike, > > It’s all about driving a large fuselage through the air. The quite small > size difference between say, a Discus A and B fuselage makes an appreciable > difference in performance, particularly at higher speeds. Compare the > massive size difference between an ASG 29 and a two seater fuselage. I > don’t know what the actual drag figures are but they must be a large > difference. Likewise the two seater ASH 25 and Nimbus 3DMs and 4DMs are > left far behind the ballasted 18 metre gliders when the speeds get up a > bit. The actual Arcus fuselage is very similar to the 20 year old Nimbus 3D > fuselages so I guess there was not much scope to improve them much.The > Jonkers JS fuselage is reputed to be an exact copy of an earlier German > glider. Actually expected the new Schleicher 32 fuselage, being a new > design, to have lesser drag but the information from Finland is not > indicative of a substantial improvement. Time will tell. Am sure you could > give us some useful information on drag calculations, > > Harry Medlicott > *From:* Rob Izatt <[email protected]> > *Sent:* Saturday, July 12, 2014 7:09 PM > *To:* Discussion of issues relating to Soaring in Australia. > <[email protected]> > *Subject:* Re: [Aus-soaring] 20M gliders > > You can get two people in a two seater and share the fun which is the > wholepoint of said two seaters. Without handicaps glider comps would be > even less viable. > > On 12 Jul 2014, at 5:59 pm, Mike Borgelt <[email protected]> > wrote: > > From what has been written here over the last few days, it is > disappointing that a new flapped 20M two seater doesn't have as good > performance as a 15M unflapped glider. > > Mike > > > *Borgelt Instruments* - > *design & manufacture of quality soaring instrumentation since 1978* > 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 > [email protected] > To check or change subscription details, visit: > http://lists.internode.on.net/mailman/listinfo/aus-soaring > > ------------------------------ > _______________________________________________ > Aus-soaring mailing list > [email protected] > To check or change subscription details, visit: > http://lists.internode.on.net/mailman/listinfo/aus-soaring > > > _______________________________________________ > Aus-soaring mailing list > [email protected] > To check or change subscription details, visit: > http://lists.internode.on.net/mailman/listinfo/aus-soaring >
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