quick q, trim means aircraft is in equilibrium

positively statically stable?

5.20.24

did some recap from last time

Davis aero gives you no fundamentals it’s unfortunate - Cameron

Wing Geometry/Terminologies

okay here are some basics:

this plane looks kinda cringe

$S_{ref}$ is the projected area of the wing or “planform area”

• look at it from top down (disregard dihedral. twist, etc.)

$b$ is the span from tip to tip of the planform wing

• not half the wing! the entire wing!

There is six basic quantities to describe the geometry of a wing:

$$ c_r \quad c_t \quad \lambda \\ b \quad S \quad \text{AR} $$

taper ratio, $\lambda = \frac{c_r}{c_t}$

root chord, $c_r$

tip chord, $c_t$

aspect ratio, $\text{AR}=\frac{b^2}{S}$

span, $b$

area, $S$

if we have three out of six of those quantities (aside from the two row-wise combinations), we can fully define a wing.

I got a nice homework on this, there’s more detailed notes in there!

Mean Aerodynamic Chord $\bar{c}$ + Mean Aerodynamic Center (MAC)