Oi reckon 'tis the 'B.S' factor.....
'When the weight of the paperwork exceeds the weight of the aeroplane, you may depart'.....
And, 'Rotsa Ruck' with that..
([SIZE="1"]As long as the ambient temp does not exceed 40C".....)
I can remember years ago taxiing in a Chieftain at YBDV for final destination YBOU (with stops at Roseberth and Durrie Stations) with the OAT gauge reading 48C.
On arrival at YBOU the OAT read 51C.
Jeez
Griffo me old; How did I get away with the above????
And a Merry Christmas to you an' all!