T-38 Aero Test Review Flashcards
What type of airfoil generally has a zero CL at zero degree AOA?
Symmetric airfoil
What types of pressures does the pitot tube and side holes sense?
Total pressure at the front hole and static pressure in the side holes
Which type of airfoil stalls at a lower AOA?
Cambered airfoil
Which airfoil has the highest CLmax?
Cambered airfoil
Which aircraft has a higher indicated stall speed: No-flap approach final or single engine normal approach?
No-flap
How is stall speed affected by fuel quantity?
Decreases with a lower quantity
What is the relationship of speed to induced and parasite drag?
Induced drag increases with a decrease of speed
Parasite drag increases with an increase of speed
What is the factor that causes the greatest decrease in thrust available in flight?
Increase in pressure altitude and temperature
If an aircraft is maintaining level flight at 280 KCAS (L/D Max is 260 KCAS) and a wind gust accelerates the aircraft to 295, what will the aircraft do over a period of time?
Decelerate back to 280 KCAS
What type of airfoil does CL drop off rapidly when stalling angle of attack is exceeded?
Cambered airfoil
Compared to a straight wing, at what AOA will a swept swing stall at?
It will stall at a higher AOA than a straight wing
Between a straight wing and swept wing, which will produce more induced drag at high AOA?
Swept wing
What two primary reasons causes a longer takeoff roll with an increase in elevation?
Thrust available decreases
Takeoff true airspeed increases
How should you adjust your landing to minimize the possibility of hydroplaning when landing on a wet runway?
Plan a firm touchdown
What can happen if an aircraft is in a total hydroplaning situation and acrosswind is present?
A complete loss of directional control may be experienced
What can happen in an aerobrake if heavy braking is used?
Locked brakes and/or blown tire
What is the entire braking procedure in the T-38 after touchdown?
Aerobrake until just prior to loss of elevator authority, lower the nosewheel to the runway, cautiously begin moderate braking until below 100 KCAS, and use optimum wheel braking below 100 KCAS
Is Takeoff speed affected by field elevation?
KCAS is NOT affected by field elevation, however, KTAS will be higher
What is SETOS?
Minimum speed to takeoff and climb at 100fpm with gear and flaps down with one engine inoperative
What is Refusal Speed?
The MAX speed to which the aircraft is able to accelerate with both engines operating in MAX, and either: abort with with Both Engines Operating or abort with an Engine Failure and stop at the end of the runway.
What is Critical Engine Failure Speed?
f. The speed to which the aircraft accelerates with both engines, experience an engine failure, and permit either acceleration to SETOS (see Decision Speed section) and takeoff (approximately 700 ft. from start of rotation at SETOS) or decelerate to a stop in the same distance.
What is Critical Field Length?
The total runway length required to accelerate with both engines operating to CEFS, lose an engine, then either accelerate to SETOS and takeoff (approximately 700 ft. from start of rotation at SETOS) or stop in the same distance (see Refusal Speed section).
What is Min Acceleration Check Speed?
The minimum acceptable speed at the specific check distance with which takeoff should be continued.
What is Decision Speed?
The minimum speed at which the aircraft is able to experience an instantaneous engine failure and still accelerate to SETOS and takeoff (approx 700 ft from start of rotation at SETOS) in the remaining runway.
Density Ratio is a function of what two factors?
Outside air temperature
Pressure altitude
What is the AOA round dial indication of 0.3?
Max endurance flight
What type of aircraft creates the most adverse wake turbulence situation?
Heavy, Clean and Slow
What is the definition of Max Endurance/
Maximum time aloft for the fuel available
How will a decrease in temperature affect specific fuel consumption?
It will decrease (less fuel required)
How would an increase in RPM from 80 to 93% affect specific fuel consumption?
It will decrease (less fuel required)
How would lowering the gear affect TAS and Max range?
TAS must decrease
Max range must decrease
As an aircraft burns off fuel, how must TAS change to maintain max range?
TAS must decrease
If a pilot descends to a lower altitude, how must TAS, Specific Fuel Consumption, and MAX Range change?
TAS must decrease
SFC must increase
Max Range must decrease
How will gliding faster or slower than L/D Max affect glide ratio?
Glide ratio will decrease
How does weight affect the distance an aircraft can glide?
There is no change in the distance. Time to glide will decrease
What two factors directly affect rate of a level turn?
Velocity
Load Factor
In a level turn, what is the effect of G’s if velocity is increased?
G’s will remain constant with a specific bank angle regardless of airspeed
What are some factors that limit how fast an aircraft can turn?
Aerodynamically (stall speed)
Structurally (max Gs)
Thrust (TR>TA)
What is the best course of action to stop a PIO?
If possible, release the controls momentarily
If near the ground, apply a small amount of back pressure and rigidly hold
If near another aircraft, freeze the stick
How is Mach Number related to altitude?
Mach Number will increase with altitude for the same corresponding KCAS
How would an increase in weight affect the induced/parasite drag curves?
Induced drag would increase, Parasite would remain constant
How does weight affect stall speed?
Weight decreases stall speed
How would lowering the gear affect induced/parasite drag?
Parasite drag increases, induced remains constant
How does bank affect induced/parasite drag?
Induced drag increases as the bank increases (in level flight), parasite remains constant
How does L/D change when the gear is down?
L/D Max lowers due to the higher increased parasite drag
How does L/D max change with weight?
L/D max is a higher airspeed as weight increases
How is L/D Max affected with bank angle?
L/D Max increases as bank angle increases
How does 95% and 90% power compare to MIL?
95% is about half thrust, 90% is about one third
When does ground effect become a factor?
When within 1/2 the wingspan of ground
What is the relationship between lift, weight, thrust and drag in a stabilized climb?
Lift < Weight
Thrust > Drag
How does Max Range airspeed change if a headwind is encountered?
Airspeed will increase
What does max excess power provide?
Max Climb Rate
At what AOA is the rudder most effective?
At high AOA
How do we avoid roll coupling?
Roll with 3/4 or less stick deflection at 1.0G for continuous aileron rolls
If 2 aircraft are flying at Max Range airspeed at different altitudes, which aircraft has the higher TAS?
The aircraft at the higher altitude
How do you recover from post stall gyrations?
Neutralize the controls
