Box Wing Aircraft

A part of the lecture materials builds upon outputs from project PARSIFAL co-funded by the European Commission / CINEA agency.

[GarretKrampe]

Hmm. This ONLY accounts for induced drag and not the parasitic drag that is much higher on box wings

[stephanmariahitzel]

The old problem of staggered biplanes is back.
The front wing sees the rear's upwash, while the rear wing has to live the the front's downwash.
We have to live with true non-linear aerodynamic characteristics, complicating layout out FC-Systems,
which is even more complex with the multitude of controls here and there.
Furthermore the "box-sides" supposed to act like wing-lets will do so only at a certain flight-condition (speed, AOA and/or weight).
As long as they can not be adjusted to the developing induced tip vortices the eventual thrust along the side-leading-edge is not available.
Apart from that the parasitic drag and interference drag comes with the planes complexity.
The ease of streched or shortened fuselages no longer can be used and each version has to have its individual wing-integration.

[fredericklee]

Very exciting - but will it fly? Could a stager swept-wing aircraft with the engines forming the bracing/connection between the wings work?

[blurglide]

I was just watching a video on NASA's truss braced wing project with Boeing, and immediately came up with this idea on my own so started looking for it. Sure enough...here it is. Why would they bother with the truss braced wing when there's this?

[abduahmad]

professor, thanks for your explanation. But I have taken box wing as my project but I am having difficulty calculating Aspect ratio and Centre of gravity. Can extend your help?

[waldoanddenisestakes]

Look up the “Imagine” triangular design by Waldo Stakes.. it is a supersonic design and much more efficient than the box wing

[ericbrammer]

Ah, Tech has finally arrived, at the Beechcraft Staggerwing (C-43) from the 1930's!! Congrats on such forward thinking! Ha ha ha...