Hi , I just finished a cross the continent flight from KJFK to KLAX in the Fenix A321 IAE SL with 2 act tanks installed as AAL300. At first this flight would have being dropped as Simbrief gave me-1950lbs of fuel to respect alternatives and final reserves. To long range and a headwind of 83 knots.

I thought what the heck lets try it out and imported the plan to the AC. 

Active Sky was also more forgiven with the wind. 53knots average headwind and the MCDU also calculated the enroute fuelburn to be 9000 punds less than the original plan.(34000 vs 43000lbs)

210 souls+2 and 6h10m later i had 12500lbs in the tanks at the gate at KLAX instead of 7600lbs So about 39000 total used.

What might be the differents?

The wind components Simbrief vs Active Sky? Does the Fenix computes its own calculations and what wind data is used?

 

Thanks Michael Moe 

Edited January 25, 20251 yr by Michael Moe

1 hour ago, Michael Moe said:

Hi , I just finished a cross the continent flight from KJFK to KLAX in the Fenix A321 IAE SL with 2 act tanks installed as AAL300. At first this flight would have being dropped as Simbrief gave me-1950lbs of fuel to respect alternatives and final reserves. To long range and a headwind of 83 knots.

I thought what the heck lets try it out and imported the plan to the AC. 

Active Sky was also more forgiven with the wind. 53knots average headwind and the MCDU also calculated the enroute fuelburn to be 9000 punds less than the original plan.(34000 vs 43000lbs)

210 souls+2 and 6h10m later i had 12500lbs in the tanks at the gate at KLAX instead of 7600lbs So about 39000 total used.

What might be the differents?

The wind components Simbrief vs Active Sky? Does the Fenix computes its own calculations and what wind data is used?

 

Thanks Michael Moe 

I've seen similar Simbrief/Active Sky wind variation on flightplans for the iFly 38M.