Flying Fuel 1.0
the author of this app says:
Flying Fuel is an aviation fuel management program for the Palm Pilot. It keeps track of fuel levels in the two tanks of an airplane during flight, whether the selection is for left, right, or both tanks. It also provides warnings to the pilot to switch tanks when it is time to switch, and a warning when total fuel is running low. The pilot can view a graphical bar chart of each tank showing current fuel level in each tank, as well as a readout of the total fuel remaining (hh:mm:ss). The user inputs the consumption rate (gallons/hour) and the capacity of the tanks, and the program does the rest. Simply tap the "Left", "Right", or "Both" selection, depending on what tank or tanks are being used.