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2D thrust vectoring for the F-35A and F-35C?



 
 
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  #14  
Old March 3rd 04, 07:27 PM
Thomas Schoene
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Scott Ferrin wrote:
On Wed, 03 Mar 2004 03:19:41 GMT, "Thomas Schoene"
wrote:

Scott Ferrin wrote:


Nope. The X-32 would have but not the 35. My guess is they could
have but maybe Lockhhed didn't want it competing with the F-22.


Or they didn't want to pay the weight penalty in an aircraft
designed for strike over air-to-air.

I recently suggested that if the F/A-22 were canceled, the Air Force
might look at an air-to-air version of JSF. An axi-symetrical
thrust vectoring nozzle would be high on the list of desirable
modifications for such an aircraft, I suspect.



I'd think they'd have to make quite a few changes to make it good
enough to be the primary air to air fighter. Internal weapon load is
tiny (2 -120s)


But the bays also have space for a pair of 2,000-lb bombs. If you can't
find a way to get another AMRAAM in each bay, you're not trying. Two more
in each bay would be harder, but seems doable. A total load of four AMRAAM
woudl be small, but acceptable. A toal of six would match the F/A-22.

, the thrust to weight leaves a lot to be desired,


The F135 is officially a "40,000-pound class" engine, against a max-fuel
weight of just under 50,000 pounds. Depending on how much rnage that thrust
actually covers, the plane has a max-fuel thrust:weight of around 0.8:1 to
0.9:1. With less fuel (say partway through a flight) it might approach 1:1.
(And as Kevin says, taking out the bomb rakcs would help a lot)

As a real widlcard, Rolls Royce says the F136 can put out 56,000 pounds of
thrust. If that number is even remotely close to right, there's a lot of
surplus power potential there. Might have to rethink the inlet design, but
that's not impossble for a dedicated air-to-air variant (certainly cheaper
than a new plane).

http://www.paksearch.com/br2002/Jul/...%20have%20huge
%20thrust.htm

and how does it fair in the manueverability dept.?


(Fare)

The Air Force says its instantaneous and sustained g capacities are already
comparable to an F-16. They don't say which version of the F-16 or under
what loads, but it's a hint that maneuveravility are not too bad.

Sure you can add external weapons but then there goes your stealth.


Well, there are degrees of stealth here. Wingtip AIM-9Xs might not impose
horrible RCS penalties.

--
Tom Schoene Replace "invalid" with "net" to e-mail
"If brave men and women never died, there would be nothing
special about bravery." -- Andy Rooney (attributed)




 




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