Chapter 17: Ground Effect

Question 1

Ground Effect Range

When does it start? What AC affects it.

Answer 1

Height = 1 wingspan start
Height = 1/2 wingspan full effect
Low wing, low tail more affected

Question 2

Ground Effect Effects (5)

Answer 2

Entering ground effect:

balloon - downwash reduced, Cle increase, L increases
float - Cdi reduces,
Speed underreads
pitch down - less downwash on elevator

Entering ground effect -> reduced 3D AoAs