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#41
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In article , OscarCVox
writes High tech wheel pants and old fashion wing. In fact the wing is much more high tech than the planks that have historically been strapped onto various Cessnas and Pipers It is tapered and has washout in the tips such that they are not providing lift (and thus drag) at cruising speeds. You thus find that their cruising speed is higher for the same horsepower engines than most convential (for that read spam can american) aircraft. And you can see out of them much better, too. -- Mike Lindsay |
#42
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Tip washout allows the tips to stall after the roots and keeps the ailerons
effective just a little longer too. You'll find washout in almost every aircraft wing except things like purpose designed aerobatic aircraft. Ian "OscarCVox" wrote in message ... High tech wheel pants and old fashion wing. In fact the wing is much more high tech than the planks that have historically been strapped onto various Cessnas and Pipers It is tapered and has washout in the tips such that they are not providing lift (and thus drag) at cruising speeds. You thus find that their cruising speed is higher for the same horsepower engines than most convential (for that read spam can american) aircraft. They are also very robust and we have decided to refurbish our 3 x DR400 tugs rather than buy new ones as they do the job so well. The only downside to wood and fabric is that they do not take kindly to being kept outside in inclement weather. Now if only we could fit a water cooled deisel and airbrakes we would have the ideal tug Nigel |
#43
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OscarCVox wrote:
High tech wheel pants and old fashion wing. In fact the wing is much more high tech than the planks that have historically been strapped onto various Cessnas and Pipers It is tapered and has washout in the tips such that they are not providing lift (and thus drag) at cruising speeds. You thus find that their cruising speed is higher for the same horsepower engines than most convential (for that read spam can american) aircraft. Of course, they are still producing drag; after all, they are in the airstream. What they are not doing, according to your description, is any useful! More likely, the wing tips are producing lift, though the designer might have selected the twist to optimize the lift distribution at cruising speed; that is, an elliptical distribution. Or, as Ian suggests, to improve the handling qualities. -- Change "netto" to "net" to email me directly Eric Greenwell Washington State USA |
#44
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"Mark James Boyd" wrote in message news:41521d6c$1@darkstar... Robert Ehrlich wrote: Mark James Boyd wrote: ... Stay away from wood. There's a reason it is uncommon in current aircraft manufacturing. ... Maybe uncommon in the USA, in France the most common 4 seats airplane is probably the Robin DR400 which is, at least for the wings, made of wood and fabric. Also widely used as a tow plane. Oh, and keep in mind that this is just my opinion. I'm sure there are lots of happy wood plane owners who love the things. To each his own... The wing's the thing. The Robin DR400 has an interesting planform and effective flaps and good low speed performance for towing. All taper in the wing begins at the dihedral break. I'm sure all following this thread have checked out some images. If not, here are some. http://www.airliners.net/search/phot...nct_entry=true One of my former UK clubs used Rollason Condors, a wood-fabric two-seat towplane. http://www.100megsfree2.com/coughtrey/g-avxw.htm We had 100hp and a 130hp versions. We didn't use the 100hp for two-seater launches, at least with two up, or without headwind. Another low-wing tow plane (metal) with good vis is the Socata Rallye, usually 180hp but with 235hp option. Heavier, but still good for short runways. Rode in and launched behind one of these in Aboyne. http://www.airliners.net/search/phot...nct_entry=true All have the low wing advantage without struts, multiple seats for checkouts, and very good viz. Don't know if this still holds true, but the UK also had a couple of other reasonable (to me) rules. A pilot could become a tow pilot (in a club) after 50 hours of PIC in power. A glider pilot couldn't carry PAX until 50 hours PIC in gliders. Frank Whiteley |
#45
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F.L. Whiteley wrote:
All have the low wing advantage without struts, multiple seats for checkouts, and very good viz. And, not to forget, they have a true stick, not that ridiculous half-cut steering wheel. Stefan |
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