Misc Boeing Fighter Projects

Would like to know what a vortex flap is myself, could it be flaps on the wingtips? IIRC, the X-70 Valkyrie had wingtip flaps for supersonic cruise.
 
amsci,

The vortex flaps are the leading edge devices visible in the drawing. Vortex flaps create low pressure lift by producing a stable vortex above the flap.

From what I could glean, the XB-70's VG wingtips were designed to take advantage of lift compression. In other words, the folded-down tips contained the shock wave that forms on the wing's underside at high speeds and then the Valkyrie could ride the lift generated by the rising pressure.
 
I remember Reading in av/week that Boeing made a mock up of there ATF bid.D's a photo of exist.
 
Would like to know what a vortex flap is myself, could it be flaps on the wingtips? IIRC, the X-70 Valkyrie had wingtip flaps for supersonic cruise.
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Look at pics of the X-32 in landing configuration and you'll see vortex flaps on the upper leading edge of the wing. They work in the same manner that strakes/leading edge root extensions operate, only they're retractable and probably operate at lower alpha, depending on the requirements.
 
okay .. might sound over speculative or even silly ... but could this be the starting point for Boeing's so called sixth generation fighter?
 
avatar said:
okay .. might sound over speculative or even silly ... but could this be the starting point for Boeing's so called sixth generation fighter?
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No chance. It's very old stuff from 80s.
 
thanks man . I see ... but have you looked at the pdf posted by lantinian in the aerospce thread?
 
Hi,


and here is a file about this Boeing Fighter Project,and they called it LES-213,and the
initial vehicle utilized a wing planform similar to the NASA SCAT-15F is called LES-210,
also the NASA SCIF-4 and SCIF-5.


Aerodynamic Analysis of Supersonic Aircraft with Subsonic Leading Edges

http://arc.aiaa.org/doi/abs/10.2514/3.58378?journalCode=ja
 

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Does anyone know if that was work by Bud Nelson while he was at Boeing or if they were designed after he went to Northrop? The first design above sure looks like the iteration between his micro-fighter for the 747 carrier and his P-900 at Northrop.
 
I have a feeling that Bud came to Northrop after Boeing stopped funding his project.
 
Re: Boeing Unknown Fighter

Hi,

who know what was this Boeing STOL,V/STOL or VTOL attack fighter Project of 1964 ?.

HIGH PERFORMANCE GENERAL PURPOSE ATTACK AIRCRAFT STUDY. CONFIGURATION ANALYSIS

Comparative airplane concepts designed to accomplish pure attack or multimission attack/fighter missions are presented for STOL, V/STOL, or VTOL takeoff and landing modes. A cursory analysis of the operating characteristics and costs of the more interesting configurations is included. It is...
apps.dtic.mil
 
Sundog said:
Does anyone know if that was work by Bud Nelson while he was at Boeing or if they were designed after he went to Northrop? The first design above sure looks like the iteration between his micro-fighter for the 747 carrier and his P-900 at Northrop.
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Hi! Northrop P-900.
 

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Apophenia said:
amsci,

The vortex flaps are the leading edge devices visible in the drawing. Vortex flaps create low pressure lift by producing a stable vortex above the flap.

...
Click to expand...
Remember that Withold Kasper worked for Boeing after he left Poland and Canada. Leading edge vortex flaps were a prominent part of his BKB sailplane. He also installed a vortex flap near the trailing edge to generate a second vortex.
The difference was that Kasper hinged his leading edge vortex flaps at their leading edge. Kasper hinged his vortex flaps upwards to encourage a span-wise row of dead airspace. The dead airspace was supposed to generate a vortex that would stabilize low pressure airflow.

Meanwhile, this proposal, F-18, Tejas, etc hinge their leading edge flaps at the trailing edge to increase wing camber. F-8, etc. also use trailing edge flaps to increase camber and lift for landing.
 
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hesham said:
Hi,


and here is a file about this Boeing Fighter Project,and they called it LES-213,and the
initial vehicle utilized a wing planform similar to the NASA SCAT-15F is called LES-210,
also the NASA SCIF-4 and SCIF-5.


Aerodynamic Analysis of Supersonic Aircraft with Subsonic Leading Edges

http://arc.aiaa.org/doi/abs/10.2514/3.58378?journalCode=ja
Click to expand...

Thanks! It is quite interesting to see this in a twin-engined concept.
 
hesham said:
From Air Pictorial 1960,

what was this STOL Fighter-Bomber ?.
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Obviously the Boeing was the winner of this competition,and may it got the Model-8XX,but never
heard about this contest,who can help ?.
 
Most likely an early notional design for the Boeing Model 818 TFX contender...
 

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