Northrop HAVSTOL and RALS studies

[flateric]

Northrop 1978 Advanced Research Configuration. Two last pics show upper munitions carriage studies.

 

[elmayerle]

I'm not entirely certain, but I believe it was in conjunction with some studies they were conducting for the US Navy.

 

[Trident]

Wouldn't it be somewhat arkward for ground crew to arm such an aircraft? That might be another reason why it never got used in the real world.

 

[Matej]

Why? Only pilot must land upside-down ;D

 

[hesham]

Hi,

Northrop RALS configuration.
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19790001853_1979001853.pdf

 

[hesham]

Hi,

Northrop RALS configuration.
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19790001853_1979001853.pdf

Also the Northrop RALS;
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19980201072_1998074642.pdf

 

[Steve Pace]

Was the Northrop RALS Northrop's version of the Rockwell XFV-12A?

 

[elmayerle]

Was the Northrop RALS Northrop's version of the Rockwell XFV-12A?

Nope, the blown wing and canard system of the XFV-12A was eariler than the RALS concept. RALS might well have worked, but the system used on the XFV-12A clearly lost something between test fiacilities and full-up configuration. I do remember people from Rockwell visiting P&W's West Palm Beach facility in 1974 (since all JTF22 (F100/F401) engineering was consolidated there) to get help on trying to improve efficiencies in the system, not that they had much success.

 

[JazzTime]

Excuse me... In your opinion... - all these ideas are deadlock road on a way of development VSTOL?

 

[elmayerle]

Excuse me... In your opinion... - all these ideas are deadlock road on a way of development VSTOL?

Well, the ejector concept has shown itself rather poorly in the XV-4A (to be replaced by a battery of J85 engines in the XV-4B) and in the XFV-12A. RALS (or for those of a somewhat outre' turn, "Bleed and Burn") is Remote Augmented Lift System which ducts bleed air to a remote combustor and nozzle to generate lift at a remove from the main engine in order to increase the total vtol thrust and balance the aircraft; the problem is that it's a very "thirsty" way of doing so. In my own personal opinion, the tandem fan concept that RR came up with and which Vought looked at extensively is, despite some of the mechanical problems, one of the better alternate approaches. One could argue that the F-35's shaft-driven lift fan is a specialized adaptation of this concept. I thik either this or the 3- or 4-poster versions of the basic Harrier concept are the best approaches for combat aircraft. For larger aircraft like cargo aircraft, things get a bit more problematical and I'm not sure we've found the best solution there.

 

[overscan (PaulMM)]

Northrop HAVSTOL concept GA drawing from poor copies in http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19790001853_1979001853.pdf

 

[overscan (PaulMM)]

Merged topics

 

[Stargazer]

From the same report as the attachment posted by Paul:

 

[Stargazer]

Tagged as a RALS proposal, this appears to be Northrop's design.
Reduced/cropped from original image: https://catalog.archives.gov/id/354343226

 

[piginapoke]

Thought i was looking at a MiG 1.44 for a minute