@bex753 The Harrier could not hover in the same place for an extended period of time like the F-35 is projected to do. The Harrier's exhaust would point down, pushing really really really hot air downwards, and hot air rises...so the air would go straight back into the Harrier, causing serious overheating problems.
The jet exhaust is supposedly blocked from the intakes from the fan pushing air down in the center of the plane. This was a spec from the air force that jet exhaust couldn't enter the air intakes. The fan pulls air down from the top of the plane where there is no exhaust.
@fais The F-35 hovers by mains of thrust from the main engine through its rotating nozzle, however it also has a lift fan in front to provide balancing thrust to the main engine, and the lift fan provides lift with cool air from the upper region of the aircraft, and this helps diffuse the heat from the main engine thrust
@Moorbo Yeah I also remember seeing the PBS special about that. They also showed the mid air hover where the jet went supersonic > Hover > supersonic before landing. Very cool stuff.
I guess this is big news because its the "Production Model" rather than the test craft.
Not overheating. The problem is that the hot exhaust air in the Harrier can go back to the inlet and cause the engine to stall, causing the airplane to crash. The F35 gets around this thanks to the lift fan, which createes a wall of cool air that blocks hot exhaust air from going forward towards its inlets.
The X-35A was converted into an X-35B. Since Lockheed's own press announcements refer to the converted X-35A as the X-35B I think it is accurate to call it that. There was also a X-35C so to call them all "a plain X-35" is inaccurate.
The subject post I was replying to was talking about how long ago the Harrier hovered (which incidentally was over 49 years ago for the prototype and 43 years ago for the production model not 35) and I was talking about how long ago nearly the same aircraft did it. I'm well aware that the X-35 variants were prototypes.
I jumped the gun. You are correct. I was used to calling those by their tail numbers and didn't realize Lockheed also gave those prototypes letter qualifiers.
I'm not going to flat out say you're wrong, because I was too lazy to even Google your claims... however, I was in the Marines and I worked on Harriers... I never once saw, nor heard about, a Harrier crashing because of hot air exhaust being directed into the fan and causing the craft to crash... not once.
The hot air exhaust ducts are at the rear of the plane. The front ducts, which are located closer to the intake fan, are cold air nozzles and do not produce hot air.
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So it can do something the Harrier Jump Jet has been able to do for 35 years big deal
@bex753 The Harrier could not hover in the same place for an extended period of time like the F-35 is projected to do. The Harrier's exhaust would point down, pushing really really really hot air downwards, and hot air rises...so the air would go straight back into the Harrier, causing serious overheating problems.
@bex753
The Harrier, wonderful Argentinian butt kicker that it is, can't go supersonic.
@Tman21901
The F35 also hovers with it's main engine pointing down and where is your evidence for this hot air rising overheating the Harrier bull!
At least the Harrier kicks ass (see True Lies) unlike the F35 which can be taken out by an old bald guy (see Die Hard 4).
@fais +1 for that impeccably researched / hilarious argument :)
@bex753
The Harrier wasn't stealth either.
@bex753
except this is owned by the the us not the uk so yeah it is a big deal
@SchultzMD
Both the US and the UK have Harriers and both will have the F35 as well.
@fais
The jet exhaust is supposedly blocked from the intakes from the fan pushing air down in the center of the plane. This was a spec from the air force that jet exhaust couldn't enter the air intakes. The fan pulls air down from the top of the plane where there is no exhaust.
@bex753
And the X-35B did this almost 10 years ago at Lockheed's plant 42; I saw the first hover from the road.
@fais
The F-35 hovers by mains of thrust from the main engine through its rotating nozzle, however it also has a lift fan in front to provide balancing thrust to the main engine, and the lift fan provides lift with cool air from the upper region of the aircraft, and this helps diffuse the heat from the main engine thrust
http://www.technologystudent.com/culture1/harr1.htm
That website references that the Harrier needs to use on-board water to cool the engine during hover.
@Moorbo Yeah I also remember seeing the PBS special about that. They also showed the mid air hover where the jet went supersonic > Hover > supersonic before landing. Very cool stuff.
I guess this is big news because its the "Production Model" rather than the test craft.
@Moorbo
There's no such thing as an X-35B, it was a plain X-35. That was the prototype.
This is a production vehicle.
@Tman21901
Not overheating. The problem is that the hot exhaust air in the Harrier can go back to the inlet and cause the engine to stall, causing the airplane to crash. The F35 gets around this thanks to the lift fan, which createes a wall of cool air that blocks hot exhaust air from going forward towards its inlets.
@tikigawd
The X-35A was converted into an X-35B. Since Lockheed's own press announcements refer to the converted X-35A as the X-35B I think it is accurate to call it that. There was also a X-35C so to call them all "a plain X-35" is inaccurate.
The subject post I was replying to was talking about how long ago the Harrier hovered (which incidentally was over 49 years ago for the prototype and 43 years ago for the production model not 35) and I was talking about how long ago nearly the same aircraft did it. I'm well aware that the X-35 variants were prototypes.
@Moorbo
I jumped the gun. You are correct. I was used to calling those by their tail numbers and didn't realize Lockheed also gave those prototypes letter qualifiers.
@tikigawd
I'm not going to flat out say you're wrong, because I was too lazy to even Google your claims... however, I was in the Marines and I worked on Harriers... I never once saw, nor heard about, a Harrier crashing because of hot air exhaust being directed into the fan and causing the craft to crash... not once.
The hot air exhaust ducts are at the rear of the plane. The front ducts, which are located closer to the intake fan, are cold air nozzles and do not produce hot air.