There is a fine line between effective downforce and excessive drag.
Any actual down force is determined upon vehicle speed and angle of spoiler/wing.
The steeper spoiler/wing angle = more downforce but also MORE DRAG.
The shallower the spoiler/wing angle = less downforce but LESS drag.
A steep spoiler/wing angle is very effective at lower speeds but a major 'DRAG' at high speeds.
A shallow spoiler/wing angle is more effective at HIGHER speeds but less drag.
On adjustable spoilers/wings ALWAYS limit it's travel to NEVER let the leading edge go into an upturned position !! :shock: :shock:
As an extra safety measure, ALWAYS safety wire all fasteners on wings.