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GeneralTate β€” Wing Array

Published: 2013-04-17 23:46:25 +0000 UTC; Views: 3300; Favourites: 51; Downloads: 45
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Description In 1949, the Air Force conducted initial testing with a little known experiment to evaluate wing tip coupling with a Douglas C-47 Skytrain and a Culver Q-14 Cadet at the Wright Air Development Center at Wright Field in Ohio. Theory predicted that increasing the aspect ratio of an airplane wing by attaching another wing at its tip improved aerodynamic efficiency, offsetting the drag of the smaller plane. A bomber would be able to tow a fighter into a combat zone with little loss of range.

As expected, this idea proved to be highly dangerous, and even more so once experimentation began with larger and faster aircraft.

The biggest problem was the extreme vortex that was generated at the wingtips of the EB-29A, which caused the attached parasites to roll violently. The entire three-plane EF-84B/EB-29A/EF-84B array crashed as a unit on April 24, 1953, killing all the crewmembers. The project was terminated shortly thereafter.
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Comments: 45

RaguLeader [2014-06-18 08:50:13 +0000 UTC]

I wonder if wing fences or winglets on the Superfort could have alleviated the vortices? Β Then again, I wonder if they had even started playing with such things at this point...

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GeneralTate In reply to RaguLeader [2014-06-19 02:02:06 +0000 UTC]

Yeah it was so early in the project that they hadn't put much thought into it. Even at that it was cancelled due to the danger level before it could even be improved upon. With the introduction of airtankers this idea was simply impractical much like the parasite fighters also in development at the time. Β 

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AirshowDave [2013-04-19 14:51:48 +0000 UTC]

I was so surprised to read this that I had to read more, here is somthing from Wikipedia, I know their info is is not always correct but I think you will find this interesting.


EF-84D
Two F-84Ds, EF-84D 48-641 and EF-84D 48-661 were modified with coupling devices; 641 starboard wing, 661 port wing for "Tip-Tow Project MX106 Wing Coupling Experiments." An EB-29A 44-62093 was modified with coupling devices on both wings. Because of the difference in landing gear lengths, the three aircraft took off separately and couple/uncoupled in-flight. The pilot of 641 was Major John M. Davis and the pilot of 661 was Major C.E. "Bud" Anderson.
"One of the more interesting experiments undertaken to extend the range of the early jets in order to give fighter protection to the piston-engine bombers, was the provision for in-flight attachment/detachment of fighter to bomber via wingtip connections. One of the several programs during these experiments was done with a B-29 mother ship and two F-84D 'children', and was code named 'Tip Tow'. A number of flights were undertaken, with several successful cycles of attachment and detachment, using, first one, and then two F-84s. The pilots of the F-84s maintained manual control when attached, with roll axis maintained by elevator movement rather than aileron movement. Engines on the F-84s were shut down in order to save fuel during the 'tow' by the mother ship, and in-flight engine restarts were successfully accomplished. The experiment ended in disaster during the first attempt to provide automatic flight control of the F-84s, when the electronics apparently malfunctioned. The left hand F-84 rolled onto the wing of the B-29, and the connected aircraft both crashed with loss of all on board personnel (Anderson had uncoupled so was did not crash with the other two aircraft)."[8]
F-84E

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GeneralTate In reply to AirshowDave [2013-04-20 01:20:57 +0000 UTC]

Aah very interesting thank's

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AirshowDave In reply to GeneralTate [2013-04-20 03:47:45 +0000 UTC]

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rOEN911 [2013-04-19 10:42:20 +0000 UTC]

is that for real?

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GeneralTate In reply to rOEN911 [2013-04-20 01:22:21 +0000 UTC]

Yeah

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GrummanCat [2013-04-19 06:33:08 +0000 UTC]

I remember reading about this in my B-36 book. At least the Goblin didn't kill anybody.

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GeneralTate In reply to GrummanCat [2013-04-20 01:22:11 +0000 UTC]

Well it was an array of parasite designs, once aerial refueling became a safe practice this became rather outdated for manned use.

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SwiftFlyer [2013-04-19 02:03:30 +0000 UTC]

This did not work out too well.

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GeneralTate In reply to SwiftFlyer [2013-04-19 03:04:55 +0000 UTC]

Nope

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F16CrewChief [2013-04-19 00:38:09 +0000 UTC]

Project Tom Tom

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GeneralTate In reply to F16CrewChief [2013-04-19 00:48:30 +0000 UTC]

Aah elaborate please !

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F16CrewChief In reply to GeneralTate [2013-04-20 12:14:14 +0000 UTC]

That program of wingtip mounted escort fighters eventually led to project Tom Tom. This had provisions for two F/ RF-84F fighters mounted to the wingtips of a B-36.

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GeneralTate In reply to F16CrewChief [2013-04-20 22:06:05 +0000 UTC]

Wow neat

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F16CrewChief In reply to GeneralTate [2013-04-20 22:21:42 +0000 UTC]

[link]

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GeneralTate In reply to F16CrewChief [2013-04-21 00:42:04 +0000 UTC]

Awesome

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F16CrewChief In reply to GeneralTate [2013-04-21 01:31:32 +0000 UTC]

I have some photos in books of the Culver Cadets on the C-47s, The EF-84Ds on the B-29s as well as the acft mentioned in the link. I kinda liked all of the FICON stuff back then.

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GeneralTate In reply to F16CrewChief [2013-04-21 02:47:48 +0000 UTC]

Do share when you get the chance

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F16CrewChief In reply to GeneralTate [2013-04-21 10:50:47 +0000 UTC]

O would recommend finding a copy of Aerophile Vol 2 No 4 with the RF-4s on the cover. This is an old magazine (August 1980). I would recommend that you seek out the Replica in Scale, Aerophile, and Aerofax publications if you can from used book vendors and Ebay. I bought these 'new' at the time

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GeneralTate In reply to F16CrewChief [2013-04-21 18:17:13 +0000 UTC]

Aah my dads got a ton of old aircraft magazines he may have em

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F16CrewChief In reply to GeneralTate [2013-04-21 23:15:05 +0000 UTC]

They are good reference materials.

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GeneralTate In reply to F16CrewChief [2013-04-22 01:55:51 +0000 UTC]

I'll take a look thank's

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F16CrewChief In reply to GeneralTate [2013-04-23 23:37:58 +0000 UTC]

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GeneralTate In reply to F16CrewChief [2013-04-24 00:10:37 +0000 UTC]

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myekeh [2013-04-18 11:42:55 +0000 UTC]

did they ever try towing?

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GeneralTate In reply to myekeh [2013-04-19 00:22:05 +0000 UTC]

Yes back in the 1940's they did a lot of towing it was done with gliders on the other hand.[link]

As you can imagine it is harder with sound barrier braking jets. These models weren't capable of braking the speed of sound though.

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myekeh In reply to GeneralTate [2013-04-19 07:39:25 +0000 UTC]

thanks, good that you are doing this on DA!

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GeneralTate In reply to myekeh [2013-04-20 01:18:21 +0000 UTC]

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RTJDudek [2013-04-18 10:09:06 +0000 UTC]

They would have achieved greater success if they just replaced the propeller engines of B-29 with jet engines.

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GeneralTate In reply to RTJDudek [2013-04-19 00:23:49 +0000 UTC]

Uuh straight wing would pose a problem. They did on the other hand do this on the B-50 [link]

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RTJDudek In reply to GeneralTate [2013-04-19 10:21:02 +0000 UTC]

Really ? I saw couple of early US jet aircraft with straight wings:
- B-45 [link]
- P-80 [link]
- P-59 [link]
- T-33 [link]
- F-84 [link]
least some of those remained in service for certain period of time.

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GeneralTate In reply to RTJDudek [2013-04-20 01:24:06 +0000 UTC]

I know this did this with fighters, a straight winged jet powered strategic bombers a bit of a different story.

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highwindwarrior1988 [2013-04-18 01:54:18 +0000 UTC]

the precision alone was amazing, takes alot of concentration to dock with an aircraft... (this is coming from a pilot...)

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GeneralTate In reply to highwindwarrior1988 [2013-04-18 02:03:56 +0000 UTC]

Yeah

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highwindwarrior1988 In reply to GeneralTate [2013-04-18 02:57:54 +0000 UTC]

XD

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wing-1plz [2013-04-18 00:09:10 +0000 UTC]

I would not enter something that looked like that.
I would dishonorably discharge

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GeneralTate In reply to wing-1plz [2013-04-18 01:44:03 +0000 UTC]

in the military you don't have a choice

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Afterskies In reply to GeneralTate [2013-04-19 01:14:25 +0000 UTC]

You do for such projects. They're volunteer only.

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GeneralTate In reply to Afterskies [2013-04-19 03:05:41 +0000 UTC]

True

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wing-1plz In reply to GeneralTate [2013-04-18 01:49:03 +0000 UTC]

as a human you do lol
you could say fuck that

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GeneralTate In reply to wing-1plz [2013-04-18 02:04:19 +0000 UTC]

Well you conclusion as to what would happen is correct

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wing-1plz [2013-04-18 00:07:17 +0000 UTC]

wings~

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LancetheB1 [2013-04-17 23:55:28 +0000 UTC]

Just looking at the picture, that looks incredibly dangerous

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GeneralTate In reply to LancetheB1 [2013-04-18 01:43:38 +0000 UTC]

It was

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