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Question

# An airport is located at 500 m above mean sea level. If the basic runway length of the airport is 2500 m and airport reference temperature is 21oC, then the corrected runway length of the airport is

A
3050 m
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B
2790 m
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C
2960 m
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D
3200 m
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Solution

## The correct option is A 3050 mBasic runway length = 2500 m As per ICAO, basic runway length should be increased at the rate of 7% per 300 m rise in elevation Correction for elevation = 0.07300×500×2500=291.67 m Runway length corrected to elevation = 2500+291.67=2791.67 m As per ICAO, runway length corrected to elevation should be increased at the rate of 1% per 1oC rise in airport reference temperature above Standard atmosphereic temperature. Standard atmospheric temperature =15−(0.0065 h)=15−0.0065×500=11.75oC Diffrence between ART and standard temperature = 21 - 11.75 = 9.25oC. Correction for temperature = 0.01×9.25×2791.67=258.23 m Corrected runway length = 2791.67 + 258.23 = 3049.9 m

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