PoF Wing Designs and characteristics

Question 1

Rectangular Wing

Answer 1

Root stalls first

Low chance of wing drop stall

Natural pre stall buffet

Pitches down naturally in stall

Not efficient

Used on light, training a/c

Question 2

Tapered Wing

Answer 2

Shortens the chord lenght from root to tip to counter increase in vortex strength

Question 3

Tapered Wing charcteristics

Answer 3

Stalls at mipspan

No natural pre stall buffet
~a/c may have artificial buffet instead

Good efficiency

Used on high performance, light a/c

Question 4

Elliptical Wing

Answer 4

Chord length is mathematically varied to counter any increase in vortex strength

Question 5

Elliptical Wing characteristics

Answer 5

Disadvantages

Whole wing stalls at once

A more sudden, serve stall

Not used on modern a/c
adv
Highest efficiency, high performance

Question 6

Swept Wing

Answer 6

Large root chord and small tip chord

Question 7

Swept Wing characteristics

Answer 7

Disadvantages

Tip stales first

High chance of wing drop stall

No natural buffet Low efficiency at low speeds

Adv
Good efficiency at high speeds

Question 8

What is Washout?

Answer 8

Angle of incidence is reduced at the tip

Ensures tip of the wig has a smaller AoA then the root

Promotes root stall before tip stall