Originally Posted by
unleashed
Higher humidity levels are prohibitive on all-aluminum aircraft due to potential corrosion issues.
That's the reason for super-dry air on all older non-composite air frames.
The 787 versus 747 and 777 was remarkable for me on the TPAC flights, I find my shorter 737 domestic to actually be harder on my body.
Drink and drink and if you ain't going to the restroom every two hours you ain't drinking enough, always amazed me how many I see that don't seem to move out of seat more than once in 12-14 hours and not surprised they feel terrible from the long flights.