Originally Posted by
DaveReidUK
Read my previous post again.
Under certain circumstances (high QNH, as in this instance), you cannot determine accurately from FR24 data the point at the aircraft has rotated.
That's my point
If the liftoff time from the report is before the supposed liftoff time on FR24 (when it goes above 0ft) then obviously FR24 is in error.
Although I don't know the resolution of the timing data on FR24, it should be possible to make a gross error check.
Using the time from the report, you should be able to roughly estimate where on the rwy it did become airborne. Again subject to FR24 data being sufficient