Aerodynamics Flashcards
What is a cranked wing as it related to the EMB-145
The wing is twisted to create varying angle of incidence from the root to the wing tip.
What is mach tuck as it relates to the EMB-145
As speed increases the center of pressure moves aft behind the center of gravity. this causes the aircraft nose to pitch down.
Why are the wings of the EMB-145 swept
to reduce the velocity of the air flowing perpendicular to the wing which reduces drag in the upper limits of the transonic region. Only a portion of the wing is exposed to the critical mach speed. Lateral stability is also improved
What are vortex generators and are any allowed to be missing?
12 Vortex generators are installed on the upper wing surface forward of the aileron. They delay boundary layer separation and enhance flight control effectiveness
What is Mach Trim and which aircraft have it installed
Only on the XR
Designed to prevent excessive speeds. at .84 mach the mach trim will command a 3° nose up trim and disengage the auto pilot. It had priority over any other trim process, may be deactivated by the quick disconnect button
