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Avia Economia, Part 2
I've posted a couple of drawings on my blog
(bobhooversblog.blogspot.com). They should be on the top of the queue so you won't have any trouble finding them. There's still a couple to go, plus the text but these will give you the idea of what's involved. While the wing is held in position by struts, stays or guy-wires, the wing itself depends upon its internal structure to keep from collapsing. As you can see, triangulated trusses hold the spars apart and prevent the structure from collapsing. Our goal is to come up with an internal structure that is strong enough to withstand the maximum load while being as light as possible. Since the wing is going to be built by people having no prior experience, the principles embodied in the structure must be easily understood and easily duplicated, since it's most likely that more than one person will be involved in the construction. Finally, the method must be inexpensive. We will probably be using the Ison-Type truss, the drawing of which is not yet posted. But it was necessary to post other types of wing-spar trussing for comparison. Even then, there are literally dozens of other methods of accomplishing this particular task. The reason I've posted these particular methods is because they are the ones most APPROPRIATE for this particular task. -R.S.Hoover |
#2
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Avia Economia, Part 2
On Sep 17, 8:27*pm, " wrote:
We will probably be using the Ison-Type truss, the drawing of which is not yet posted. * The best pictures yet I've found of the construction of this type of wing. http://www.karmy.com/minimax/pictures/wing/wing.htm |
#3
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Avia Economia, Part 2
On Wed, 17 Sep 2008 20:27:43 -0700 (PDT), "
wrote: I've posted a couple of drawings on my blog (bobhooversblog.blogspot.com). They should be on the top of the queue so you won't have any trouble finding them. There's still a couple to go, plus the text but these will give you the idea of what's involved. While the wing is held in position by struts, stays or guy-wires, the wing itself depends upon its internal structure to keep from collapsing. As you can see, triangulated trusses hold the spars apart and prevent the structure from collapsing. Our goal is to come up with an internal structure that is strong enough to withstand the maximum load while being as light as possible. Since the wing is going to be built by people having no prior experience, the principles embodied in the structure must be easily understood and easily duplicated, since it's most likely that more than one person will be involved in the construction. Finally, the method must be inexpensive. We will probably be using the Ison-Type truss, the drawing of which is not yet posted. But it was necessary to post other types of wing-spar trussing for comparison. Even then, there are literally dozens of other methods of accomplishing this particular task. The reason I've posted these particular methods is because they are the ones most APPROPRIATE for this particular task. -R.S.Hoover Bob I must confess to being an adherent of Wittman's ply covered wing. we can get marine grade 1.5mm sheet Queensland Hoop Pine ply reasonably easily in australia. the wing has the usual parallel truss ribs, a single spar which is a solid timber, and a diagonal grain plywood cover. the wing is amazingly light and is torsionally rigid. the Tailwind needs only one strut. I must send you a photo via email. Stealth Pilot |
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Avia Economia, Part 2
On Sep 18, 5:29*am, Stealth Pilot
wrote: Bob I must confess to being an adherent of Wittman's ply covered wing. ------------------------------------------------------------------------- Dear Stealth, I agree. Steve's strut-braced wing is a wonderful example of engineering, worthy of study by anyone having an interest in the practical side of aeronautics. But the same can be said for Ken Rand's wing or the geodesic wing of Bert Sisler (indeed, the wngs of the 'Cygnet' and the 'Tailwind' are sisters under the skin). But not for a Primary Glider :-) -Bob |
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Avia Economia, Part 2
"flybynightkarmarepair" wrote in message ... On Sep 17, 8:27 pm, " wrote: We will probably be using the Ison-Type truss, the drawing of which is not yet posted. The best pictures yet I've found of the construction of this type of wing. http://www.karmy.com/minimax/pictures/wing/wing.htm Bob, is the SUPERFLOATER sort of what you have in mind? That is, as far as the bracing in the wing? http://www.kite-enterprises.com/SUPE...ges/sfwide.jpg Flash |
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Avia Economia, Part 2
On Sep 17, 10:21*pm, flybynightkarmarepair wrote:
On Sep 17, 8:27*pm, " wrote: We will probably be using the Ison-Type truss, the drawing of which is not yet posted. * The best pictures yet I've found of the construction of this type of wing. http://www.karmy.com/minimax/pictures/wing/wing.htm Here's some more of this type of all-wood truss wings, this time a Legal Eagle http://www.angoraaffaire.com/leu/wings.htm |
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