Intro Flashcards
What do you times m/s by to get knots?
1.944
What is the equation of continuity
Conservation of mass flow
As area goes down velocity must go up keep the same volume of air traveling through a gap
What phenomena makes air “hug” the top edge of an aero foil
The Coanda effect
What is Bernoulli’s theorem
That as dynamic pressure increases static pressure must decrease and the same for the reverse
What is form drag
The difference in pressure from front to back of an object
Where is the centre of pressure on a aerofoil
25% of the aerofoil from the front
Cambered aerofoil = 23.5-27%
Why is there a drop in static pressure above the wing
As air goes over the leading edge radius it’s speed (dynamic pressure) increases therefor static pressure decreases
What is the thickness - chord ratio
Ratio between aerofoils max thickness to its length
What does total reaction depend on
Coefficient of life and the dynamic pressure
With a symmetrical wing what happens when AOA is increases
Cal increases linearly
What happens as thickness is increased of a aerofoil
Cl max increases
Stalling angle of attack increases
What are the effects of camber on an aerofoil
Higher cl max
What are the effects of training edge flaps
= increases camber = increased lift
Lower stall angle of attack
