offset help required if possible.

Hi All,
Just wondering if anyone know the offset for weight off wheels (wow)? in otherwords the moment the plane becomes airborn to the time it touches down. I want to use this offset to trigger a Hobbs meter to record actual flight time. Just to keep a record of how little time i realy do spend flying.
Cheers
Trev

Offset $0366, Length 2 // Plane on Ground? 0=Air, 1=Gnd

Thanks for that info. Now i can show my wife how little time i actually spend flying. LOL. She hates my sim and everything to do with it. She keeps reminding me that the only time she will like it is when it is finished and up for sale.
Cheers again
Trev