Question: before you go on the plane, you have to keep in mind how much your luggage weighs as there is a limit on how much you can take, so say there were 150 people on the plane how much luggage could there be per person?
The amount of payload (Luggage) you can carry is related to;
1) The temperature on the day of the flight (This affects how much engine power you can use).
2) The mass of the aircraft (Big aircraft need to carry more fuel to move them).
3) The distance it has to fly (More distance requires more fuel).
4) The number of people on board (More people require more fuel).
So once you work out all that then you can subtract it from the maximum payload value to work out how much you have for luggage.
So.. Say you fly in a Boeing 737-600NG on a normal day;
It weighs around 40 tons on it’s own,
Then you add 30 tons of fuel,
Then the weight of 150 passengers, 12 tons (if they’re American and a bit on the porky side).
The maximum take off weight is 85 tons.
That leaves you with 3 tons left over for luggage;
3000/150=20 Kg per person
So you can quickly see there’s not much room for overweight luggage otherwise you’d never be able to take off!
Good answer Huw! However I would rather say: ‘ You fly on Airbus A320’! 🙂
Also if an Aircraft manufacturer decides to change the design of the aircraft and increase it’s MTOW (Maximum take off weight) it will usually mean that they can carry more fuel and go further. I don’t think the luggage allowance will ever change ;/