Basic Runway length and Corrections

Basic Runway Length

Correction for Elevation, Temperature and Gradient

Correction for Elevation

Corrections in runway length

(i) correction for elevation:

[`L'= L.(7/100).(E/300)`]

L1 = L + Lc

E =  elevation from MSL (m)

L =  Basic runway length

Lc= Correction due to elevation

L1= Corrected length

Correction for Temperature

Correction for Temperature in runway

• Standard temp = 15 – 0.0165 (E)

Correction for Gradient

Correction for Gradient in Runway

Basic Runway length

Length of runway under following assumed conditions

(i) Airport at sea level

(ii) Temperature at airport is 15 'C (standard)

(iii) Runway is levelled in longitudinal direction.

(iv) No wind blowing on runway.

(v) Aircraft is loaded at its full capacity.

(vi) There is no wind blowing enroute to destination

(vii) Enroute temperature is standard.