Aircraft performance.
Once you have defined your own aircraft in PocketFMS (and PocketFMS can keep an unlimited number of Airplane Definitions) the program will automatically compute your Weight & Balance data, fuel consumption, whether the required runway length is available at the planned destination, whether that runway's crosswind component isn't too much for your aircraft and climb and descend rates, and incorporate these values in your flight plan.
Even when diverting, PocketFMS is able to guide you to the nearest suitable airport for the aircraft you're currently using, based on the combination of aircraft data you've entered here and available weather information. E.g., PocketFMS won't recommend you to divert to an airport where the current crosswind factor exceeds your aircraft's maximum crosswind limit, the cloud base is too low or where there's insufficient runway length available.
The PocketFMS flight planning routines will try to find a suitable alternate airport for any trip you make. To prevent planning to unusable airfields, you can specify certain minima to apply. These minima are made airplane specific, so different airplane performances will result in different alternate airfields being selected.
Weight & Balance.
A total of 20 Weight & Balance stations can be defined, including multiple baggage areas and fuel tanks. These stations, each consisting of an Arm and a Moment, are stored with the aircraft. Any station that has the word 'fuel' in its name is treated as a fuel storage, and therefore used in determining the max fuel - zero fuel plot.
Next time you use this aircraft, you'll only have to enter the current weights and you're set. The Weight & Balance graph will show both max and zero fuel situations. As long as the plot stays within the envelope, your W&B situation is safe to fly!
