Kopp-Etchells effect

The Kopp-Etchells effect is a result of dust striking helicopter blades as they take off or land at night, causing a bright ‘halo’ effect around the spinning rotor disk.

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect

kopp etchell effect