Originally Posted by
Alex Whittingham
If you are planning balanced field, as most Boeing stuff seems to do, you are assuming TODA=ASDA (or usually TORA=TODA=ASDA). There being no stopway at Bristol your second sentence falls away, it can't be both balanced field and have a clearway longer than ASDA.
As per many preceding posts, we do know that OEI the average aircraft should make 35ft at the end of TORA/TODA/ASDA. This assumes an engine fail at VEF, one second minimum recognition time with less than full thrust, then V1, then accelerate at 50% thrust to VR, rotate, and climb to 35ft at 50% thrust. The quoted figures of being at 150ft at the equivalent point having not lost an engine don't seem unreasonable.
Alex. That 150 feet is a quote from the Boeing training manual. I am sorry that I have no way to post a link to it.