Somewhere back in one of the "Boeing Airliner" magazines I recall seeing a paragraph which stated that if you cannot touch the brake area without hurting your hand, then by definition the brakes are hot. But hot can mean ordinary hot, very hot or really really hot. You are not going to leave your hand there long enough to decide which.
Without a brake temperature indication system, it becmoes guesswork to determine how many million foot-pounds the brakes have absorbed during (say) a 100 knot abort on a long runway. Or a max weight landing and a high speed turn-off taxiway. I am discussing 737 ops here.
Can anyone give me advice on an intelligent way to apply the Brake Cooling Schedule in a 737 without having to delay every take off simply because the brakes were too hot to touch?