# Useful load in cabin

I ve created a new route for my plane but the total useful weight is gonna be 90% because I m over the optimum range of my plane fairchild dornier 328 jet.

If I use a cabin configuration wich only use 90% of the avaliable space in the cabin, will all the seats avaliable or just 90% of the seats I put in the cabin?

Use the performance calculator for your model of aircraft, the key number to look at is the “Calculated Payload” number. Every passenger is worth 95kg regardless of class of service, and every unit of cargo is 100kg. As long as (NumberOfSeats95)+(CargoUnits100) is less than CalculatedPayload, you’re fine.

Also, if you are over the limit, the first gets dropped (or reduced) cargo, then economy PAX, then business pax, then first class pax.

Fastest way to figure it out -- multiply the maximum number of passengers rated for that plane (found on the Manufacturers pages) by the percentage given to you by the performance calculator. That should give you a general idea of how many passengers you can cram onto the plane. I don't even know if a 328 has cargo capacity.

Actually even easier way:

Divide CALCULATED PAYLOAD by 95, and round down.

e.g.

Calculated payload 14,089 kg

Maximum payload 16,600 kg

% of maximum 84.9%

Fuel consumption 21,146 l

14,089 / 95 = 148.305 so this flight can take 148 pax.

If the actual assigned seating config has 155 pax (example) and 10 units of cargo, distributed in 130 Y and 25 C, it would make 123 Y pax and 25 C pax bookable in the ORS for that flight, with 0 units of cargo bookable.

CALCULATED: 148 PAX

Available: 148 PAX to be assigned

Assigned 25 to C

Remains available: 123 PAX

Assigned 123 to Y

Imagine same config but with 145 pax, and 10 units of cargo:

Distributed in 110 Y, 25 C, 10 F.

CALCULATED: 148 PAX

Available: 148 PAX to be assigned

Assigned 10 to F

Remains available: 138 PAX

Assigned 25 to C

Remains available: 113 PAX

Assigned 110 to Y

Remains available: 3 PAX

which is equal to 3x95 kg = 285 kg

Remains available: 285 kg

Assigned 2 units of cargo (2*100 kg)

edit: formatting and details

It's clear now! Thank for your help as always

Actually even easier way:

Divide CALCULATED PAYLOAD by 95, and round down.

e.g.

Calculated payload 14,089 kg

Maximum payload 16,600 kg

% of maximum 84.9%

Fuel consumption 21,146 l

14,089 / 95 = 148.305 so this flight can take 148 pax.

If the actual assigned seating config has 155 pax (example) and 10 units of cargo, distributed in 130 Y and 25 C, it would make 123 Y pax and 25 C pax bookable in the ORS for that flight, with 0 units of cargo bookable.

CALCULATED: 148 PAX

Available: 148 PAX to be assigned

Assigned 25 to C

Remains available: 123 PAX

Assigned 123 to Y

Imagine same config but with 145 pax, and 10 units of cargo:

Distributed in 110 Y, 25 C, 10 F.

CALCULATED: 148 PAX

Available: 148 PAX to be assigned

Assigned 10 to F

Remains available: 138 PAX

Assigned 25 to C

Remains available: 113 PAX

Assigned 110 to Y

Remains available: 3 PAX

which is equal to 3x95 kg = 285 kg

Remains available: 285 kg

Assigned 2 units of cargo (2*100 kg)

edit: formatting and details

Does this happen to all kind of aircraft, or aircraft with cargo allowance in it?

I mean, lets say, Embraer 195. No cargo capacity. It can fly up to 124 pax. And then I choose to fly with 50 pax only. Does the 74pax x 95kg / 100 kg will be distributed to cargo?

Does this happen to all kind of aircraft, or aircraft with cargo allowance in it?

I mean, lets say, Embraer 195. No cargo capacity. It can fly up to 124 pax. And then I choose to fly with 50 pax only. Does the 74pax x 95kg / 100 kg will be distributed to cargo?

-Yes, only with "cargo allowance".

-No, it wouldn't.