Pilots, do you really not have acceleration data during takeoff?

[Kelly Hopper]

But the perf figures are already for a net aeroplane. That is to say the worst aircraft in the fleet on the worst day. They are factured down so that in reality you should always get better performance than the fugures suggest.
Sometimes I question them but the law makers say they are correct.

[Curious Pax]

Originally Posted by ProM

However to absolutely and completely provide a total solution it would require either additional kit and workload at the airport end, or additional kit on airport and aircraft. So either way it would be expensive.

Not necessarily. Get a teenager just out of school, give him one of those signs that the ball-spotters at golf tournaments have to flag where a ball has landed, and stick him by the side of the runway. ATC then just have to give him a shout as the next departure lines up, so he can leg it to the correct point. All the crew then have to do is to make sure they have passed the spotty kid by 100 knots, and bingo!!

Might need some spotty youths in reserve for low viz procedures, as they would have to stand on the runway in that situation, and might get clipped by a passing wingtip.

[wclark1238]

I remember a very, very long takeoff roll when onboard a very well laden KC-135A. We were deploying to Darwen in Australia from Andersen AFB in Guam and had all kinds of maintenance/support personnel and equipment on board. We also will have been pretty well fueled as we were ferrying the B-52Gs to Darwen and all 3 birds were 'fed' en route.

The initial acceleration seemed (from my view through a side window in the back) slightly sluggish but this thing just kept on chugging along whilst it seemed reluctant to take flight. The wind on this day was from the opposite direction to normal so we were taking off in a (roughly) southerly direction rather than the more usual northerly. I'm watching landmarks passing by on the port side - oh look there's the phase hangar, there's the terminal building, there's the transient aircraft ramp, THERE'S THE OLD ALERT RAMP and we're still not up Soon after passing that and thinking that we'd be rolling onto the perimeter road she gently started to climb. I'm not sure of the length of the runways at Andersen - pretty damn long as it is an emergency landing strip for the shuttle - but on this day they were only just long enough for us or so it seemed from my vantage point.

Thank God for the re-engine programme and the emergence of the 'R' model.