ATPL PERF QUESTION
Hi Guys, can you clarify this for me?
Field length requirements:
a. When no stopway or clearway is available the take off distance must not exceed 1.25 x TORA...I presume that means clearing the 50ft obstacle clearance within 1.25 the TORA?
b. When you have a stopway or clearway, take off distance must not exceed
1. Tora
2. 1.3 x ASDA
3. 1.15 the TODA
What on earth does no. 3 mean? How can your take off distance be within a limit of 1,15 times the TODA???? If the TODA is assumed to be the distance from the start of the ground roll to the nearest obstacle in the direction of take off, then when calculating your required TOD, how can you go beyond it?
This always confuses me , any help out there???
Thank you