Which of the following is/are correct?
1
7 % increase in runway length for every 300 m rise in elevation from the mean sea level.
2
3 % increase in runway length for every 1oC rise in airport reference temperature (ART) above the standard temperature at elevation (STE).
3
Standard temperature at elevation (STE) = Temperature at MSL (15oC) – 0.0065 x elevation
4
20 % increase in runway length for every 1 % increase in effective gradient.