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Post Info TOPIC: The LHX Program


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RE: The LHX Program
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Stingray wrote:

More LHX concepts, but by which teams?

 

 

http://img121.imageshack.us/img121/3689/lhx2.jpg


 

First is a Bell/McDonnell-Douglas concept, the second is by Boeing-Sikorsky.



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Alan Dallas


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The Bell/McD-D concept appears in LHX Attack Helicopter, an awesome game. biggrin

1-3570_2.jpg



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Thanks for IDing those concepts.

Artist's impression of the Bell/McDonnell-Douglas "SuperTeam" LHX concept:

http://img15.imageshack.us/img15/808/superteamlhx1.jpg

http://www.flightglobal.com/pdfarchive/view/1989/1989%20-%200494.html



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Stingray wrote:

http://www.flightglobal.com/pdfarchive/view/1989/1989%20-%200494.html


 

Artist's impressions of the Boeing/Sikorsky "First Team" LHX concept:

http://img651.imageshack.us/img651/5084/firstteamlhx.jpg

firstteamlhxpit.jpg



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Stingray wrote:
Stingray wrote:
Stingray wrote:

Another McDonnell-Douglas project, for NOTAR a supersonic jet helicopter/fighter:

mddlhx.gif

 

EDIT: Higher-res image:

http://img196.imageshack.us/img196/1743/mcddnotarlhx.jpg


 

Also:

http://img42.imageshack.us/img42/8836/mdcnotarlhx.jpg


 

Plus:

http://img18.imageshack.us/img18/3689/lhx2.jpg


 

And:

hugheslhx2.jpg



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Via Flateric at SPF:

Dynoman post from RAH-66 thread

Hughes had a NOTAR system with a scimitar main rotar (Testor kits) and a convential rotar in early drawings.

http://img18.imageshack.us/img18/3218/hugheslhx.jpg



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Boeing/Sikorsky LHX Microwest desktop model:



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Artist impression of the Boeing-Vertol LHX concept:

http://www.flightglobal.com/pdfarchive/view/1985/1985%20-%203126.html



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Artist impression of the Sikorsky LHX concept with ABC:

http://img42.imageshack.us/img42/1430/lhx0006.jpg

Artist impression of an early version of the Boeing/Sikorsky proposal:

http://img837.imageshack.us/img837/4224/lhx0019.jpg

http://www.arcforums.com/forums/air/lofiversion/index.php?t202161.html



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Bell BAT (Bell Advanced Tiltrotor) LHX concept:

http://img718.imageshack.us/img718/1048/bellbat2small.jpg

http://img148.imageshack.us/img148/2562/bellbatsmall.jpg

bellbatspecifications.jpg

 

http://img96.imageshack.us/img96/2686/belllhx1small.jpg

http://img717.imageshack.us/img717/3829/belllhx2small.jpg

http://www.arcforums.com/forums/air/lofiversion/index.php?t202161.html



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Stingray wrote:

Sikorsky ABC (Advancing Blade Concept):

http://img694.imageshack.us/img694/5818/sikorskyabc.jpg


 

Better color picture:

http://www.arcforums.com/forums/air/lofiversion/index.php?t202161.html

http://img196.imageshack.us/img196/621/sikorskylhxsmall.jpg



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Stingray wrote:
Stingray wrote:

Sikorsky ABC (Advancing Blade Concept):

http://img694.imageshack.us/img694/5818/sikorskyabc.jpg


 

Better color picture:

http://www.arcforums.com/forums/air/lofiversion/index.php?t202161.html

http://img196.imageshack.us/img196/621/sikorskylhxsmall.jpg


 

And:

http://img41.imageshack.us/img41/6264/ringtailsmall.jpg



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Sikorsky LHX concepts:

http://img695.imageshack.us/img695/3940/lhx0005.jpg

http://img64.imageshack.us/img64/3921/lhx0016.jpg

http://www.arcforums.com/forums/air/lofiversion/index.php?t202161.html



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LHX design (possibly by Boeing-Vertol) being tested in NASA's wind tunnel:

http://books.google.com.eg/books?id=e-MDAAAAMBAJ&pg=PA50&dq=LHX+helicopter&hl=ar&ei=Q9O-TLLMEIOaOuq1qEc&sa=X&oi=book_result&ct=result&resnum=19&ved=0CG0Q6A
EwEg#v=onepage&q&f=true



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Stingray wrote:

Boeing/Sikorsky LHX Microwest desktop model:


 

Getting awful close to the Comanche we all know and love.

Northrop also had a submission to the LHX program in 1985, similar to some McDonnell-Douglas concepts while utilizing stopped X-Wing rotors much like Sikorsky's program.



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Stingray wrote:

Sikorsky LHX concepts:

http://img695.imageshack.us/img695/3940/lhx0005.jpg

http://img64.imageshack.us/img64/3921/lhx0016.jpg

http://www.arcforums.com/forums/air/lofiversion/index.php?t202161.html


 

So, Stingray. How do you feel about the Mi-24 being the falling enemy in this impression? biggrin



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Pepper wrote:
Stingray wrote:

Sikorsky LHX concepts:

http://img695.imageshack.us/img695/3940/lhx0005.jpg

http://img64.imageshack.us/img64/3921/lhx0016.jpg

http://www.arcforums.com/forums/air/lofiversion/index.php?t202161.html


 

So, Stingray. How do you feel about the Mi-24 being the falling enemy in this impression? biggrin


 

It makes me a saaaaad panda. Still, the LHX owns all. Hands down.



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Seconded! Strongly seconded!



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Sidewinder wrote:
Stingray wrote:

Boeing/Sikorsky LHX Microwest desktop model:


 

Getting awful close to the Comanche we all know and love.

Northrop also had a submission to the LHX program in 1985, similar to some McDonnell-Douglas concepts while utilizing stopped X-Wing rotors much like Sikorsky's program.


 

You mean this? It was a sole entry to the X-Wing program. The two engines were placed vertically on top of each other along the longitudinal axis of the aircraft's fuselage to reduce size and weight.

According to the patent, The engines provide the drive mechanism for the rotor via a common gear box, drive an air compressor utilized to provide compressed air in a controlled manner through slots formed on the blades of the X-wing, and provide the propulsive force for the aircraft. The engines are also utilized to provide pitch and yaw capability. Each engine and the core jet stream therefrom is ducted to a rectangular shaped nozzle having vectoring flaps for pitch control. The vectoring flaps also act as nozzle blockers in conjunction with the left and right hand side vectoring cascades used for yaw control. Additional pitch and yaw control may be provided by a control surface formed on the underside of the aircraft fuselage forward of the lower side cascades.

It was also intended to have an ejection seat for emergency situations, though the aircraft would have to stay in fixed-wing flight or have detachable rotor-wings in order for the pilot to successfully pass the general area of the rotor disk.

The full patent is floating around somewhere in the appropriate section of this forum.



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See US Patent #4711415 in Google Patents.

I use to have a color concept of Northrop's scout-attack X-Wing but it seems to have disappeared from my computer. I'll post it up as soon as I find it.



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First Team LHX/

http://www.flightglobal.com/pdfarchive/view/1989/1989%20-%202174.html?search=lhx



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SuperTeam LHX concept model.

http://www.flightglobal.com/pdfarchive/view/1989/1989%20-%200496.html?search=lhx



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Stingray wrote:

See US Patent #4711415 in Google Patents.

I use to have a color concept of Northrop's scout-attack X-Wing but it seems to have disappeared from my computer. I'll post it up as soon as I find it.


 

I've seen it elsewhere myself. If memory serves me correctly, it was the same patent drawing colored for a web site or news agency.



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Right you are Ace, and I still can't find my copy. It might have been deleted during an information transfer between my two PCs, and I have it printed out in my "North America" volume of my binder "archives" under my bed, but not only is it complete hell to get to at the moment, but the print is in black-and-white. You're better off with the original patent drawing for now until I find a better copy of the color version.



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Meh, I got nothing else to do today... so I dug through the archives and decided to scan it anyway. biggrin

http://img841.imageshack.us/img841/105/northrop.png



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Stingray wrote:

Bell BAT (disqualified from LHX), from "Warplanes of the Future" by Bill Gunston, 1986:

http://img34.imageshack.us/img34/7471/bellbat.jpg

http://img228.imageshack.us/img228/1184/bellbat2.jpg


 

Why was it disqualified from the program? Did it not properly fulfil requirements being a tilt-rotor configuration?



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Probably yeah, and maybe because it lost to the Boeing/Sikorsky First Team who developed it into the Comanche.



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failcopter67 wrote:
Stingray wrote:

Bell BAT (disqualified from LHX), from "Warplanes of the Future" by Bill Gunston, 1986:

http://img34.imageshack.us/img34/7471/bellbat.jpg

http://img228.imageshack.us/img228/1184/bellbat2.jpg


 

Why was it disqualified from the program? Did it not properly fulfil requirements being a tilt-rotor configuration?


 

Yes and no. The requirements were changed sometime after Bell completed a few BAT (Bell Advanced Tiltrotor) mockup demonstrators. It had similar provisions for internally-stored armament, but it's weight was a problem since newer LHX requirements included a weight limit of under 3150kg. The BAT was 3600kg.



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More LHX, unknown source... derp.



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These last ones are the closest to the initial RAH-66 design to the point of it being impossible for any other to come closer. Great finds!



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