Does anybody know what "PTOBO" would refer to?
This is in the Concorde Vol IIa flight manual.
The aircraft must not be taxied with a PTOBO in excess of :-
3300 kgs for a 53.5% take-off
1800 kgs for a 54% take-off
Could stand for something like "Pre-Take-Off Balance-Offset", but solving this riddle would please both me, and the friend who asked me the question
CJ