Joined-wing and box-wing aircraft

hesham

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Hi,

a project for ring wing double deck airliner.
http://www.flightglobal.com/PDFArchive/View/2003/2003%20-%200326.html
 

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Antonio

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hesham,

where did you found that "box wing" airline. Could you please give us more details?

Thanks,

Antonio
 

hesham

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hesham said:
Hi,

box-wing aircraft.
My dear Pometablava ,

I think the reference by my dear Boxkite contain the name of the site,that becuase
I don't remember its name now.
 

amsci99

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Here's what I believed to be a CG concept drawing for a joined-wing glider. Picked this up from a foreign language forum which was using this to explain the joined-wing concept. There was no reference to this glider design perhaps members in know can assist.
 

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hesham

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A joined wing aircraft;
http://adg.stanford.edu/aa241/intro/futureac.html
 

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Retrofit

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Hi,
Something more retro: The MAI-Kuzakov modified Po-2.

A scale model was wind-tested in 1951 by the Moscow Aviation Institute.

Photo and drawing from "Letatyelnyye Apparaty MAI" by Makarov, 1994
 

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Retrofit

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This one was also designed and tested by the MAI, but I don't know the specifications and history.
Is there a 3V drawing available?
Photo from "Letatyelnyye Apparaty MAI" by Makarov, 1994
 

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hesham

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Thank you Retrofit;

it is very interesting projects,and anther joined wing aircraft
and high altitude surveillance aircarft.
http://aerade.cranfield.ac.uk/subject-listing/design.html
 

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hesham

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Hi,

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19890009036_1989009036.pdf
 

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hesham

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Also California Univ. joined-wing very large transport aircraft,it look
like Lockheed C-5 fuselage.

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19940020238_1994020238.pdf
 

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Mr London 24/7

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Air Force Institute of Technology Report into "INERTIA MEASUREMENT AND DYNAMIC STABILITY ANALYSIS OF A RADIO-CONTROLLED JOINED-WING AIRCRAFT".

http: //www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA451280&Location=U2&doc=GetTRDoc.pdf

"In 2004 and 2005 AFRL Air Vehicles Directorate designed, built, and flew a scaled radio-controlled joined-wing aircraft, called VA-1"
 

hesham

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Hi,

From Lockheed Georgia,the Joined-wing long-endurance RPV.
http://www.flightglobal.com/pdfarchive/view/1987/1987%20-%200018.html
 

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Mr London 24/7

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"UNIQUE STEALTH UNMANNED AERIAL VEHICLE - HOUCK AIRCRAFT DESIGN PROGRAM"
(A patented MAV/UAV joined-wing aerofoil concept)

(Volume 1: Program Overview)
http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA494088&Location=U2&doc=GetTRDoc.pdf

(Volume 2: Prototype Report)
http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA494062&Location=U2&doc=GetTRDoc.pdf

With funding....:

http://www.globalsecurity.org/military/library/budget/fy2006/usaf-peds/0602201F.pdf
http://www.globalsecurity.org/military/library/budget/fy2007/usaf-peds/0602201f.pdf
http://www.dtic.mil/descriptivesum/Y2008/AirForce/0602201F.pdf
 

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hesham

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Hi,

The Lockheed boxwing concept,please note;there is
no tail fin.
 

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igor-mich

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Retrofit said:
This one was also designed and tested by the MAI, but I don't know the specifications and history.
Is there a 3V drawing available?
Photo from "Letatyelnyye Apparaty MAI" by Makarov, 1994
1976 V. Kuznetsov drafted sport aerobatic aircraft "Photon-01" diamond-shaped wing. The aircraft is now intended to establish a piston engine M-337 260 hp with a tractor propeller.
 

Stargazer2006

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John Wolkowitch's ACA Industries JW-1 and derivative projects:

 

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igor-mich

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In 1977, Mr. Kuznetsov was designed to Moscow Aviation Institute super-heavy transport aircraft with diamond-shaped wing.
 

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Stargazer2006

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The Green Flight Challenge will be held September 25 – October 1, 2011 at the Charles M. Schulz Sonoma County Airport in California. Nine teams are registered to compete in the competition. Team Synergy is led by John W. McGinnis. They are located in Montana. Their aircraft is a clean sheet design, featuring laminar flow, wake-immersed propulsion, open thermodynamics, subsonic area ruling, composite construction, and five seats. Synergy is currently registered and has met the FAA inspection.

Seats: 6
Max. power: 142 kW
Span: 32.0 ft
Energy type: Bio-diesel


Sources:
- http://www.synergyaircraft.com/
- Synergy: A Practical Lightplane for the New Century
- Proyecto Synergy, Buscando La Máxima Eficiencia
- NASA Green Flight Challenge: Conceptual Design Approaches and Technologies to Enable 200 Passenger Miles per Gallon
- Synergy on Facebook (access to many other pics)
 

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Nik

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Phew ! I had to go google the FW oddity.Despite looking like a turbo-prop, it is piston-engined, via an extension shaft...
 

Stargazer2006

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Box wing or not, the wing surface is so ridiculous that I can't see that thing staying up in the air for a minute...
 
A

AAAdrone

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It doesn't look like there's enough wing area to produce sufficient lift to get that thing off of the ground. Though a simple solution would of course just be to increase the takeoff speed. ;D
 

hesham

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Hi;


the Final optimized joined-wing aircraft configuration.
 

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Zeppelin

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Can anyone summarise the advantages of these wings. Being joined do they have greater structural strength. The all seem much thinner then conventional wings - would that mean less room for fuel storage? Regards
 

AeroFranz

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In short: you have two wings of higher aspect ratio, and short chord. That might help some with achieving laminar flow (although the required sweep does not!).
The biggest plus is the fact that the wings are braced, so for a given strength they can be made lighter or with higher span. Both the high aspect ratio and the three-dimensional profile of the wing (seen from the front) help with induced drag.
 

Zeppelin

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Many thanks for the summary. Would such wings drive engines to be mounted of the main fuselage and not wing?
Regards
 

RanulfC

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Zeppelin said:
Would such wings drive engines to be mounted of the main fuselage and not wing?
Regards
You'll note in the various pictures the power plants are mounted on the wings in some designs and not on others. If the design uses thinner, longer, high aspect ratio wings then the power plants are probably going to be on the fuselage for strength and power carry-through reasons. If the wings CAN hold the engines then they probably will be mounted there such as in the Kuznetsov design shown. It's a design decision in the end.

BTW; I recall at one point seeing a drawing or "design" sketch of a BD-5J with joined/diamond wings and one point in time. Anyone else happen to recall seeing that or any information there-on?

Thanks

Randy
 
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