posted on Oct, 10 2017 @ 06:32 AM
a reply to: gariac
The parts of the F-35 that make it "amazing" is certainly not the airframe performance. It's the stealth, sensors, avionics and perhaps the STOVL
system. Obviously it would be nicer if these were paired to non-multi-service aircraft.
It would be nice if the F-35 was more like the aircraft in my avatar.
I don't know if they fixed it yet, but it would go bingo for insufficient fuel to cool electronics, not to fly the plane
Tthere are certain avionics, fuel, and temperature limits in several flight manuals including the F/A-18 Super Hornet.
At nominal ambient conditions, the aircraft fuel system should provide adequate cooling for the FADECs and subsystem accessories. With extremely
hot ambient conditions, feed tank fuel temperatures can approach the 59°C inflight limit. During low altitude flight in hot conditions, particularly
with a low fuel state, an L or R FUEL HOT caution may appear. If sufficient cooling is unavailable, the L or R OIL HOT cautions may also appear.
Regardless, 5th generation aircraft tend to become thermally challenged because they have a large amount of avionics and limited availability of
heatsinks (i.e. cannot place a heat-exchanger anywhere for LO reasons. On the Block II Super Hornet they added very visible vents near the tail above
I've heard the F-35 becomes thermally limited limited at the end of a sortie, hot day, at low altitude, with less than 1,000 lb fuel remaining.
No worse at CAS than other 4th generation aircraft, except EOTS is a generation old at this point.
B-21 should have more thermal headroom because it's a large aircraft with more fuel and space and will be expected to fly at high altitude where the
air is much colder
edit on 10/10/17 by C0bzz because: (no reason given)