## AVIATION MATHEMATICS

Mathematics is woven into many areas of everyday life.Performing mathematical calculations with success requires an understanding of the correct methods and procedures, and practice and review of these principles. Here are some of the aviation math that you will use in most of the flights.

Threshold Speed

Vat = ( No fuel + two pilots ) = 70kts , +1.5kts per passenger + 1kts per every 20 galls of TOTAL Fuel

Pressure Altitude

29.92 - ( Current Baro ) = Z

Z x 1000 + Field Elevation = PA

Density Altitude

1.24 x Pressure Altitude = A

120 x OAT degrees C = B

A + B - 1800 = DA

Crosswind

CW= Wind Speed Sin ( RW Direction - Wind Direction )

Headwind

HW= Wind Speed Cos ( RW Direction - Wind Direction )

Cloud Base ( ft )

The diffrence between temperature + dew point x 300

Decision Altitude ( ILS )

DA as published round to nearest 10 and add 20ft

Minimum Decision Altitude ( NDB )

MDA as published round to nearest 10 and add 50ft

Asymmetric Commital Alititude ( ACA )

200ft + Runway Elevation

Calculating Winds Aloft From Surface Winds

Winds Alof = Surface wind direction + 30 degrees / Double surface wind speed