### Calculating the Crosswind components

Follow-up to Crosswind Circuits – Lesson 14 from Christine's Flying blog

Cessna 152 has maximun crosswind component of 12 kts. Before taking off I need to ensure that the crosswind component of the wind is less than 12kts

**Calculation- The Sixths Rules of Thumb**

First calculate angle between runway and wind direction . Taking lesson 14 as example wind direction 270 deg runway is 230 deg – therefore angle = 40 deg

then apply rule

if angle = 10 deg then crosswind component = 1/6 wind strength

if angle = 20 deg then crosswind component = 1/3 wind strength

if angle = 30 deg then crosswind component = 1/2 wind strength

if angle = 40 deg then crosswind component = 2/3 wind strength

if angle = 50 deg then crosswind component = 5/6 wind strength

if angle = 60+ deg then crosswind componnet = wind strength

So at 40 deg and 17 kts wind strength – crosswind component = ~ 12kts