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Author Topic: Joined-wing and box-wing aircraft  (Read 39872 times)

Online hesham

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Re: Joined-wing and box-wing aircraft
« Reply #30 on: February 01, 2012, 01:36:46 pm »

Offline Skyblazer

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Re: Joined-wing and box-wing aircraft
« Reply #31 on: February 01, 2012, 01:40:43 pm »
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...

AAAdrone

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Re: Joined-wing and box-wing aircraft
« Reply #32 on: February 01, 2012, 01:52:27 pm »
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

Offline Grey Havoc

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Re: Joined-wing and box-wing aircraft
« Reply #33 on: February 07, 2012, 12:05:45 pm »
The sole imperative of a government, once instituted, is to survive.

Online hesham

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Re: Joined-wing and box-wing aircraft
« Reply #34 on: April 09, 2012, 03:50:11 pm »
Hi;


the Final optimized joined-wing aircraft configuration.

Offline Zeppelin

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Re: Joined-wing and box-wing aircraft
« Reply #35 on: April 09, 2012, 11:21:33 pm »
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

Offline AeroFranz

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Re: Joined-wing and box-wing aircraft
« Reply #36 on: April 10, 2012, 12:01:50 pm »
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.
All modern aircraft have four dimensions: span, length, height and politics.   TSR.2 got the first three right - Sir Sydney Camm

Offline Zeppelin

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Re: Joined-wing and box-wing aircraft
« Reply #37 on: April 11, 2012, 12:31:24 am »
Many thanks for the summary. Would such wings drive engines to be mounted of the main fuselage and not wing?
Regards

Offline RanulfC

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Re: Joined-wing and box-wing aircraft
« Reply #38 on: April 11, 2012, 05:09:15 am »
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

Online hesham

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Re: Joined-wing and box-wing aircraft
« Reply #39 on: April 12, 2012, 03:11:44 pm »
What is this aircraft ?.


Offline Skyblazer

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Re: Joined-wing and box-wing aircraft
« Reply #40 on: April 12, 2012, 04:10:54 pm »
I'm nowhere near fluent in Russian, but the text seems to indicate a patent from the SibNIA company.

Online hesham

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Re: Joined-wing and box-wing aircraft
« Reply #41 on: April 14, 2012, 03:58:41 pm »
I think that Russian's article is from NASA reports.

Online hesham

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Re: Joined-wing and box-wing aircraft
« Reply #42 on: July 25, 2012, 09:28:20 am »
Hi,


here is the Prandtl Electrical VTOL Unmanned Aircraft;


http://www.skyboxeng.com/projects/projects.htm

Offline Mark Nankivil

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« Last Edit: January 16, 2013, 08:52:59 am by Mark Nankivil »

qxev

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