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Aircraft fly by having at least as much lift as weight. Lift
provided by aerofoils and airspeed, airspeed is provided
thrust, which costs fuel and therefore money. In recent
years, United Airlines, among others, have begun
the pilots flight bags with iPads and the like.
bag would normally be filled with >20kg of flight plans,
navigational charts weather reports and other assorted
paperwork. This weight saving translates to a big fuel
saving when applied to a large airline <link>.
Now, when SCUBA diving, many people pee. More than
usual. The phenomenon, termed "immersion diuresis" has
two components, cold, and pressure. Cold constricts the
vast network of capillaries in the skin, increasing blood
pressure slightly, and pressure increases... well, pressure
generally. Both of these combine to force more water
through the kidneys by increasing filtration rate.
you pee more.
Now, if airlines were to collude with airports on this,
the departure lounge should be deliberately chilly, and
hyperbaric. Squeezing an extra 100l pee out of 200
passengers is a lot better than swapping that ipad in.
good thing about loosing weight off the aircraft is you
don't need as much fuel. Which means the aircraft needs
less fuel to carry THAT fuel, and so on.
So, departure lounges, high pressure, cold, toilets like
palaces. For extra points, get the passengers to burn off
glycogen and its associated water by making sure the
snacks are super expensive... oh, they're onto that one.
326,000 Gallons saved
[bs0u0155, May 13 2015]
||You could always make a pre-boarding announcement
along the lines of "Boarding will commence in 15
minutes; this flight is operated on behalf of Delta by
Aeroflot and Malaysian Airlines." That would reduce
average passenger boarding weight quite effectively.
||I think Aeroflot's involvement might actually protect a
Malaysian plane, from errant SAMs anyhow.
||//United Airlines, among others, have begun
replacing the pilots flight bags with iPads //
||Why not simply implement the passengers in
||Incidentally, if you kept people for an hour in a
hyperbaric room, then put them in a cabin pressure
equivalent to 8,000ft, would they not tend to pop?
||//would they not tend to pop?//
||Hosing them out at the other end is a fast and convenient
method of deplaning.
||Forget the plane and transport everyone by supersonic sub.
||Well, the speed of sound in water is over 3000 mph, so the
journey times would be attractive.
||Hyperbaric departure lounge. At the gate, hypobaric area (4000m
AMSL equivalent) with very low humidity & warm temperature.
Passengers lose more mass by faster evaporation from the lungs.
Plus, leave them there long enough and they'll acclimatise - no need
to pressurise the aircraft, hence less stress on the airframe and
another fuel saving. Plus the low oxygen level will keep 'em docile
during the flight.
||Low temperatures also cause human bodies to burn more
calories to keep themselves warm. This will also reduce
body weight a small amount for each passenger (plus
encourages pee-ing, since water is one of the by-products
of the metabolism process).
||//At the gate, hypobaric area (4000m AMSL equivalent)//
||I thought of this, my reasoning was different though,we
have this zone so that any intestinal gasses that might occur
in the hi-low pressure transition should be released before
people get into the confined tube.
||So, have a counter selling air freshener, nose clips and
deodorant at inflated prices.
||Who would have thought it was possible to chisel so much money
from the travelling public ? Apart from airlines and airports, that