Aerodynamics Foot Stomps Flashcards
What is the relationship of the 4 forces in level flight?
T = D and W = L
If you decrease your bank angle from 60 degrees to 30 degrees, what happens to stall speed?
Stall speed decreases
What does the induced drag curve look like?
It slopes downwards (high at low airspeed and low at high airspeeds)
What happens to thrust available as RPM increases?
Thrust available increases
What happens in the region of reverse command?
There is airspeed instability and the aircraft response to airspeed deviations in this region is opposite
-If you are at 200 knots with the power at 91% and a disturbance causes your airspeed to decrease to 190 knots, the airspeed will continue to decelerate further until power is increased
How does drag change for a symmetric wing?
There is more induced drag but less parasite drag (for high speeds)
How does a symmetric wing change the stall AoA?
Symmetric wings stall at a higher AoA
What happens to Mach (the speed of sound) as altitude increases?
Mach decreases
What happens to the T-38’s aerodynamic center at supersonic speeds and what does this mean?
the aerodynamic center moves further aft of the CG which makes the T-38 more stable, but less maneuverable
What is Mach Number?
True airspeed / Speed of Sound
Where is your max angle of climb found at?
L/D Max
What happens to your glide distance with a tailwind?
Glide further
What happens to specific fuel consumption with temperature?
SFC decreases when temperature decreases (good thing)
What is max endurance in the T-38?
230 KCAS plus fuel (which occurs at L/D Max)
If you are in a constant G turn, but decreasing airspeed, what happens to your turn radius and turn rate?
Turn radius decreases
Turn rate increases
How do you know two points have the same potential energy on an energy diagram?
they are at the same altitude
Where do you need to be on an EM diagram to climb or accelerate?
+ Ps (positive specific power)
What characteristics does a low-mounted wing have?
More maneuverable
Less stable
What is the recovery procedures for post-stall gyrations?
Neutralize the controls
What is the recovery procedures for a stall?
Max, Relax, Roll (NOT FLAPS)
When initiating a stabilized, constant airspeed climb from level flight, which of the primary forces is the only force that does NOT change in size or direction?
Weight
In a wings-level, constant airspeed climb, lift is ____ weight
less than
In general, what effect does an increase in AOA have on lift if CAS is kept constant?
Lift increases
What effect does lowering the flaps have on the 1-G level flight stall speed?
Decreases the stall speed