Fuel Calculator - msupino/NavigationApp GitHub Wiki

๐Ÿ‡ฎ๐Ÿ‡ฑ ืขื‘ืจื™ืช

Fuel

NavAid's fuel figures are part of the Flight Plan โ€” there is no separate fuel calculator window.

What you set

Open ๐Ÿ“‹ Flight plan and use the Aircraft row at the top:

Field Meaning
Gallons per hour Cruise burn. Seeds from the defaultGph tuning key on first use.
Taxi and Takeoff (gal) A flat allowance added once, and only when the leg actually starts at an airfield.

Both persist per device under navaid.aircraft ({ gph, taxiGal }) and sync across your devices if Drive settings sync is on โ€” see Settings and Persistence.

What NavAid computes

  • Per leg โ€” leg time ร— gph, shown in the Flight Plan's Fuel column.
  • Route total โ€” the sum of the legs, plus the taxi allowance when the route departs an airfield. This is the gal figure in the map's route summary and the plan's total row.
  • Return route โ€” when Show return is on (off by default, see Toolbar), the return direction gets its own taxi allowance if it ends at an airfield.

Leg time is distance รท speed, so fuel follows the same rule: vertical speed never changes it (see Route and Legs). Entering a climb rate changes the profile picture, not the burn.

What NavAid does not do

Be clear about this before you plan on it:

  • No tank capacity, and no reserve check. NavAid will not tell you the route exceeds your endurance. Compare the total against your own aircraft's usable fuel and your reserve minimum yourself.
  • No aircraft presets (C172 / PA28 / SR22 etc.) โ€” you enter the burn figure for the aircraft you are flying.
  • No fuel-type distinction (AvGas / Jet-A1) โ€” the number is gallons, whatever you burn.
  • No taxi-in, run-up, or diversion allowance beyond the single taxi/takeoff figure.

Tips

  • Enter the burn from your own aircraft's POH at the power setting you actually plan to use, not the book optimum.
  • Fill in per-leg Speed honestly โ€” a speed that is 10 kt optimistic makes the fuel figure optimistic by the same proportion.
  • Add your reserve mentally, or add a final leg back to your alternate so its fuel appears in the total.

See also