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Wing Fold/Hanger Space

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103

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Ideal Wing fold is a 10 minute one person job. Road ability is secondary to the ability to slot in and share a scarce commodity of hanger space. I have plans for FRED which is what Scott Perkins terms a compound fold. Leading edge points to the ground and wing folds parallel to the fuselage.

I have attached a few pictures of a FP101 with a custom semi compound arrangement. This has an advantage over a kitfox swing back wing in that you do not need the complexity removing the rear cabin and of flaps to swing up when folding along side the cabin.

Balancing the need to keep it simple robust and not add much to the empty weight is where the sharp pencil is needed.

Please share your designs on this thread for educational use. The 101 in the pictures was built in the early 80's in Wisconsin. The Snap shots are all I have I did not build it. It appears to add a second V to pivot the wing. The Pictures do not provide enough detail.20191004_204531_resized.jpg 20191004_204537_resized.jpg
 

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Riggerrob

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That “pitched roof” will shed snow loads better than wings that fold to create a “flat roof.”
Why care?
A few years back, during a heavy snow storm, a Piper-type wing collapsed.
 

Riggerrob

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If you want to use wing struts as part of the folding mechanism, what about Stitts Playmate?
It has a low wing braced by V struts terminating bear the lower corner of the windshield. Pulling the front spar locking pin allows folding wings back to the tail. A travelling brace holds wing tips against the tail.
 

Riggerrob

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Me. 103,
If you want to avoid Kitfox-type hassles (removing turtle deck fairing and disconnecting flaps) take a close look at the Luton Major.
Luton Major is a 1930s-vintage British design that mounts wings on top of the cabin roof and the turtle deck is narrow enough to not interfere with flaps.
Luton Major fold geometry also allowed wing tips to rest on top of the horizontal stabilizer.
Luton Major plans were sold in North America by Falconar as the “Cub Major.”
 

103

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Me. 103,
If you want to avoid Kitfox-type hassles (removing turtle deck fairing and disconnecting flaps) take a close look at the Luton Major.
Luton Major is a 1930s-vintage British design that mounts wings on top of the cabin roof and the turtle deck is narrow enough to not interfere with flaps.
Luton Major fold geometry also allowed wing tips to rest on top of the horizontal stabilizer.
Luton Major plans were sold in North America by Falconar as the “Cub Major.”

Yes fortunate the cub major plans remain available under new management. Looks like a candidate for a Corvair engine.

http://cubmajor.com/

Good looking airplane
https://forum.flyinginireland.com/viewtopic.php?t=9129

Vintage film

 

ToddK

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Here is a picture of the Cub Major/Luton Major with its wing folded. It is not necessary to disconnect the flight controls like it is on a kit fox or many other airplanes, just fold up a hinged fairing over the rear of the cabin, pull a pin from the front of each wing and fold them back.
 

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103

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Here is a picture of the Cub Major/Luton Major with its wing folded. It is not necessary to disconnect the flight controls like it is on a kit fox or many other airplanes, just fold up a hinged fairing over the rear of the cabin, pull a pin from the front of each wing and fold them back.
The Luton Major was ahead of it's time for wing folding taking full advantage of the tandem seating. Plans remain available http://cubmajor.com/
 

Winginitt

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One thing to think about when you see a design you like is that most of these quick fold demos probably don't have any fuel in the wing tanks while doing the demo.
 

Dana

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One thing to think about when you see a design you like is that most of these quick fold demos probably don't have any fuel in the wing tanks while doing the demo.
Most of these quick fold planes don't have wing tanks. Kitfox does, though, and it presents no problems
 

Victor Bravo

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I have experience with the Kolb, and it folds down to the narrowest and smallest floor space footprint of any folding mechanism. It is not quite the simplest (you do have to disconnect two pushrods, and the tail folds) but it is definitely able to store in the narrowest corridor. You can put a Kolb in a single car garage... next to the car.

The Sky Raider and Ridge Runner (two Avid Flyer derivatives) use the same Avid method (of direct rearward folding with the struts attached), but the tandem seating allows a narrow rear turtledeck that makes them narrower than an Avid.
 

pictsidhe

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I have experience with the Kolb, and it folds down to the narrowest and smallest floor space footprint of any folding mechanism. It is not quite the simplest (you do have to disconnect two pushrods, and the tail folds) but it is definitely able to store in the narrowest corridor. You can put a Kolb in a single car garage... next to the car.
Folded length and width in feet and inches?
 

Topaz

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Presuming that control connection is fully automatic, and that the disconnect is, essentially, a single pin for each wing, what's the feeling about detachable wings versus folding?

Sailplanes almost universally have detachable wings, yet powered aircraft generally go for foldable. The dichotomy is curious.
 

Dana

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Folded length and width in feet and inches?
My Ultrastar folded to something less than 24" wide in the back, in the front the landing gear was the widest thing, it just fit in what I think was a 50" wide trailer. Length maybe 20', don't recall for sure.
 

Vigilant1

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Sailplanes almost universally have detachable wings, yet powered aircraft generally go for foldable. The dichotomy is curious.
Is one factor the "community activity vs solo activity" issue? When the sailplanes folks are active, it seems there are lots of them about, it is no big inconvenience to find someone to help move a detachable wing (somebody is already there running the cable, etc). It's different for a powered plane pilot who just wants to go to the airport himself and fly for a few hours, or leave on a long trip as the sun comes up at a deserted airport.
It doesn't need to be either/or. The Thatcher CX4 wings are removable, but you can fit a nifty little fixture to the top of the wing that holds the wing root after the spar is pulled out, and allows the wing to be pivoted LE down and then folded alongside the empenage. It turns it into a folding wing with one-person rigging/ derigging done from the wingtip.
 

Hot Wings

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Is one factor the "community activity vs solo activity" issue?
Kind of along my lines of thinking. With the attached wing you have a built in assistant to control the other end of the wing. Important when trying to rig the plane in wind. Even the sailplane guys build rigs to help with the wing handling. Kind of hard to haul those rigs with the plane so the need to return to the starting point increases.
 
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