If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
sliding wings?
when I look at my eyeglass case, I see two closely overlapping wing-type shapes that are being pulled apart for opening. why would it not be worthwhile to extend wings this way for landing and departure? /iaw |
#2
|
|||
|
|||
sliding wings?
I seem to remember a German University Akafleig (Academic Flying Group)
built and flew a telescoping wing glider in the 1960's. I recently heard a proposal to use an inflatable airfoil structure that extended the wingspan of a metal wing at low speeds. It seems very complicated but, if successful, the payoff is huge for STOL performance plus high speed cruise Bill Daniels wrote in message oups.com... when I look at my eyeglass case, I see two closely overlapping wing-type shapes that are being pulled apart for opening. why would it not be worthwhile to extend wings this way for landing and departure? /iaw |
#3
|
|||
|
|||
sliding wings?
In article .com,
" wrote: when I look at my eyeglass case, I see two closely overlapping wing-type shapes that are being pulled apart for opening. why would it not be worthwhile to extend wings this way for landing and departure? /iaw Do your eyeglass cases have ribs? Do you want to introduce a substantial amount of complexity, perhaps roughly on a par with retractable landing gear? Do you want to carry around a bunch of useless weight during cruise just to give you a bit better STOL performance? I'll keep an open mind, and would love to hear this idea fleshed out, but for now, I think flaps are the weapon of choice here. |
#4
|
|||
|
|||
sliding wings?
hmm...I am just asking. I am not an engineer, so I cannot calculate loads and required strengths, but it would not seem to be too difficult to integrate parallel ribs that slide along tracks with the extra wing. or use some other wing strengthener that extends with the wing (e.g., a scissor-type extender). so maybe my eyeglass container solution won't work, but flaps do not strike me as the only solution. yes, they allow for a sharper angle of attack, but they do not gain much in terms of wingloading. (and more importantly, in high speed, we need less wing and drag, not more.) inflatable would be nice, too... :-) modern materials like composites should be pretty strong, too. mostly just wondering why we do not get more wing when we need it... /iaw |
#5
|
|||
|
|||
sliding wings?
|
#6
|
|||
|
|||
sliding wings?
wrote)
[snip] mostly just wondering why we do not get more wing when we need it... Here's a possible solution: http://www.jefflewis.net/autogyros.html Autogyro History and Theory http://www.groenbros.com/product/history.htm More history - Groen Brothers Aviation My idea for an Autogyro is for the smallish blades to be able to provide an extra (25% - 40%) lift for take off and landing. Plane would tool along at 100-138 mph (without much of a speed penalty from the Autogyro blades) and there it would be when you needed it - letting you land at 42 mph instead of 62 mph ...or maybe even 37 mph. g Now, if you want some fun - incorporate small air-tip jets into the blades for a little extra boost on take offs or landings. No tail rotor needed. :-) Again, just enough of an Autogyro to be a good little helper to the plane's wings. (It sure wouldn't hurt having one in an engine out situation.) Montblack |
#7
|
|||
|
|||
sliding wings?
In article . com,
" wrote: hmm...I am just asking. I am not an engineer, so I cannot calculate loads and required strengths, but it would not seem to be too difficult to integrate parallel ribs that slide along tracks with the extra wing. or use some other wing strengthener that extends with the wing (e.g., a scissor-type extender). so maybe my eyeglass container solution won't work, but flaps do not strike me as the only solution. yes, they allow for a sharper angle of attack, but they do not gain much in terms of wingloading. (and more importantly, in high speed, we need less wing and drag, not more.) inflatable would be nice, too... :-) modern materials like composites should be pretty strong, too. mostly just wondering why we do not get more wing when we need it... /iaw Not being an engineer should give you a leg up. The point I had hoped to make with the rib reference is that, I don't quite see how the ribs in the extension will slide past the ribs in the main wing. |
#8
|
|||
|
|||
sliding wings?
There have been a lot of experimentals with variable wingspan.
One you will find here http://www.aviafrance.com/4806.htm KH schrieb im Newsbeitrag oups.com... when I look at my eyeglass case, I see two closely overlapping wing-type shapes that are being pulled apart for opening. why would it not be worthwhile to extend wings this way for landing and departure? /iaw |
#9
|
|||
|
|||
sliding wings?
Not variable wingspan, but variable wings
http://www.ctrl-c.liu.se/misc/ram/rk-i.html http://www.ctrl-c.liu.se/misc/ram/is-1.html KH "Karl-Heinz Kuenzel" schrieb im Newsbeitrag ... There have been a lot of experimentals with variable wingspan. One you will find here http://www.aviafrance.com/4806.htm KH schrieb im Newsbeitrag oups.com... when I look at my eyeglass case, I see two closely overlapping wing-type shapes that are being pulled apart for opening. why would it not be worthwhile to extend wings this way for landing and departure? /iaw |
#10
|
|||
|
|||
sliding wings?
"Smitty Two" wrote in message news In article .com, " wrote: when I look at my eyeglass case, I see two closely overlapping wing-type shapes that are being pulled apart for opening. why would it not be worthwhile to extend wings this way for landing and departure? /iaw Do your eyeglass cases have ribs? Do you want to introduce a substantial amount of complexity, perhaps roughly on a par with retractable landing gear? Do you want to carry around a bunch of useless weight during cruise just to give you a bit better STOL performance? I'll keep an open mind, and would love to hear this idea fleshed out, but for now, I think flaps are the weapon of choice here. Come to think of it, one of the latest racing 15 meter wingspan racing sailplanes has a 100% monococque wing - no ribs or spar. |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
VP-II wings available in Oregon, USA (Or, "How I was coconuted...") | Roberto Waltman | Home Built | 2 | October 29th 04 04:21 PM |
Charging for Wings safety seminar? | Marty Shapiro | Piloting | 19 | June 23rd 04 05:28 PM |
Double covering fabric covered wings | [email protected] | Home Built | 9 | May 9th 04 08:39 PM |
Stolen "Champ" wings located...from 23,000 feet!! | Tom Pappano | Piloting | 17 | December 15th 03 01:24 PM |
Wings from "Champ" stolen in Oklahoma after emergency landing | Tom Pappano | Piloting | 1 | December 7th 03 05:02 AM |