11.   Friday practice is a poor indicator of race performance as teams experiment with fuel loads, tires and aerodynamic setups.

12.   Irvine said his problems Friday were the result of a heavy fuel load in his Ferrari.

13.   But he admitted his competitors might not have been running on fresh tyres and could have had bigger fuel loads.

14.   The pit during that caution put Andretti back in sequence and with the same fuel load as the rest of the field.

15.   Shorter flights require lighter fuel loads, leading to less strain on the engines, which last longer and require less maintenance.

16.   The craft shed its fuel load and returned to Heathrow to make its emergency landing.