That's exactly what I do and in most instances it completely solves the problem.

Usually they don't have extras and occasionally they completely forget to board blankets.

No way. At all costs I want to avoid visiting that little room that has a pool of urine on the floor.

They never seem to have Grey Goose.

Actually, it doesn't. On every aircraft using bleed air (everything except the 787) the air has to be cooled, as the bleed air temperature is around 200C. I don't think anyone would want this to be blown into the cabin. And AFAIK the compressed air in the 787 has to be cooled too.

Should not make a big difference between bleed air or air from a compressor. In both instances, roughly, consider adiabatic compression.

You may well be right that air needs cooling. It is easy to check. First we would need to go look at the standard atmosphere table, then look at the temperature increase that results from adiabatic compression etc. I'll let someone else do the exercise. :D

Ever fly TK? I think they set the cabin to "Broil".

Love the airline, seats, food, lounges; but damn does the cabin temp suck!

Dont forget to account for the fact that the aircraft is loosing a lot of heat to the atmosphere ...

You would not wanted to be on my Westjet flight from Las Vegas on Wed. night. Cabin was over 30C for the first 2 hours. Flight landed with a temp. of 25C.

Never heard of loose heat. :D

But seriously, I would not expect that to be terribly signif9icant in comparison with the effect of adiabatic compression.

Admittedly I did not try to work out figures. To start with, one would need data on how well the cabin is insulated.

Bleed air IS air from a compressor. Specifically the compression stage of the turbine engine.

Precisely. :D

BTW, I quickly worked out the figures.

Assuming at 11,000 m, conditions to be 217K and 22.6 kPa. Pressurization to 2000 m (might be a bit too high), where pressure is 79.5 kPa. Adiabatic compression for an ideal gas with gamma of 1.4 results in a temperature of around 311 K, i.e. 38C. Now, if compression is not quite ideal, and if pressurization is to an altitude a bit below 2000 m, temperature will end up a bit higher.

If using bleed air, I wonder if it might not end up being taken from some compressor stage at a pressure higher than really needed for the cabin?

Yes- Just a few weeks ago- TK4 from JFK to IST in J...Cabin was uncomfortably warm...and I was in shorts and a t-shirt for the sleeping portion..

I am impressed. :D Are you an engineer??

I think so. Excess pressure is plumbed into the cabin and then regulated using an outflow valve. The valve is pretty much always partly open. At least this is how it works in airplanes I'm familiar with. Also bleed can be taken from different compressor stages depending on cabin demand. A later stage will deliver higher pressure and higher temperature air but bleed from the later stage robs the engine of air used for cooling.

Exactly!

If I were ever in a situation where the SD said "no, other people are too cold", I would say "Okay, well they can put on another layer or grab a blanket, or I can take my pants off."

I've only once had to request the temperature to be lowered though, and that was on LH. The FA was rude about it the whole time. Maybe it's because the entire cabin had mentioned it.

FA pulled up the temp on the cabin systems control screen.

Yup, A330.

I fly them all the time and hate the cabin temp. I would triple my flying with them if they'd get it to 21c.

Does anyone happen to know what the SOP is for cabin temp TATL? (curious)