Why choose the surface of the earth as your frame? It is moving East at about 800 kph at my latitude, not to mention the 110,000 kph velocity of the earth around the sun.
Don't forget we are moving at an average velocity of 828,000 km/hr around the galactic centre.
https://starchild.gsfc.nasa.gov/docs...uestion18.html
Thank goodness relativity made looping a glider and turning down wind so simple that we only have to consider IAS. Phew!