I flew round trip from JFK to London Heathrow recently on British Airways. Funny thing happened. My wife and I sat in Row 50, Economy of a 747-400 on both legs. We both were covered with light perspiration throughout each leg. 16 hours in the cabin total roundtrip . Basically the cabin temperature was too high. I'm sitting in a 74F room right now and I'm not perspiring at all. So I'm going to say that the cabin temperature was at least a few degrees higher than 74F. I would guess it was closer to 80F. Very uncomfortable. I should note that I made my living for 12 years measuring temperature.
As we left the plane, I asked a flight attendant what the thermostat was set at and he said 22C, which is 71.6F. Then when we walked into the more expensive parts of the cabin, both my wife and I independently noted how much cooler it was there. Purely coincidental I'm sure.
These flights were the first international flights of my life although I've flown extensively within the US. Every domestic airliner I've flown has a separate AC adjustable nozzle for each seat. These BA planes had one small diameter hole over the middle seat of 3 for the AC. Even this hole was partially obstructed by a slidable flap that even in its wide open position still partially obstructed the opening.
So I guess what I'm asking is whether anyone else has experienced these conditions? Has it got to the point in commercial aviation that you have to pay a higher fare so you don't have to sweat? British Airways, really!