AERO 315 GR2 PREP ALL EXAM
QUESTIONS AND ANSWERS 2026
VERIFIED.
If an aircraft is in SLUF, then the equations of motion simplify to: - ANS T = D and L = W
SLUF stands for: - ANS Straight, Level, Unaccelerated Flight
An aircraft is doing a loop. At the moment when it is traveling straight up, the _______ must be
equal to 90º - ANS Flight path angle
Lift acts perpendicular to which vector? - ANS The relative wind (velocity vector)
Which of the following assumptions is NOT required to derive the relationships T = D and L = W?
- ANS Angle of attack = 0
A new hypersonic surveillance aircraft is capable of flying at Mach 10 at 100,000 feet (Std Day).
At this rate how fast can it transit from Los Angeles to New York (2500 nm)? Hint: First, find the
Speed of Sound (in ft/sec), then determine the aircrafts velocity by v = Ma. Then convert to
knots (nm/ hour). Now remember velocity is distance per time. Solve for time. Finally convert to
minutes - ANS 25 minutes
If an aircraft is in SLUF and we know the weight of the aircraft, W, the wing area, S, the density
and velocity, what else must we know to determine the coefficient of lift of the aircraft? -
ANS We do not need any more information
@2026/2027 ALLRIGHTS RESERVED.
, An aircraft flying in standard sea level conditions has a wing area of 300 ft2, CLmax of 1.2, and
weight of 30,000 lb. What is its stall speed for these conditions? Work this problem using the
equation definition of lift coefficient, solved for velocity, which is Equation 5.18. Assume SLUF so
L = W and substitute the value of CLmax = 1.2 for the CL in the equation, then the velocity you
calculate will be the stall speed. - ANS 265 ft/s.
If an airplane with a turbojet engine produces 10,000 lbs of thrust at sea level, how much thrust
will it produce at 30,000 feet (assume Std Day)? See Equation 5.11. - ANS 3,750lbs
Referring to Figure 5.14a in the book, what is the minimum velocity this aircraft can fly at in
SLUF? - ANS 70kts
Referring to Figure 5.14a in the book, what is the maximum velocity this aircraft can fly at in
SLUF? - ANS 400kts
What is the TSFC of a T-38 at normal cruise power at 10,000 ft (Std Day)? Go to Table B.6 on
page 593 in the book or page 31 of the Supplemental Data. Note: there are three Specific Fuel
Consumption Installed. Use the TSFC for Normal Power and Equation 5.16 to correct for
altitude. - ANS 1.05/hr
True or False: afterburners are a fuel-efficient way of increasing thrust. - ANS False
If you were designing an aircraft to fly at M = 0.5 and you wanted the engine with the highest
thrust-to-weight ratio, which engine would you choose (Assume that a rocket is not an option)?
(Hint: refer to Figure 5.2) - ANS Afterburning turbofan
If you were designing an aircraft to fly at M = 0.8, what would be the most fuel efficient engine
you could choose? (Hint: refer to Figure 5.3 and lower TSFC is better...) - ANS High-bypass
turbofan
What is Thrust Specific Fuel Consumption (TSFC)? - ANS Fuel flow (lbs/hr) required to
produce a pound of thrust (lbs)
@2026/2027 ALLRIGHTS RESERVED.
QUESTIONS AND ANSWERS 2026
VERIFIED.
If an aircraft is in SLUF, then the equations of motion simplify to: - ANS T = D and L = W
SLUF stands for: - ANS Straight, Level, Unaccelerated Flight
An aircraft is doing a loop. At the moment when it is traveling straight up, the _______ must be
equal to 90º - ANS Flight path angle
Lift acts perpendicular to which vector? - ANS The relative wind (velocity vector)
Which of the following assumptions is NOT required to derive the relationships T = D and L = W?
- ANS Angle of attack = 0
A new hypersonic surveillance aircraft is capable of flying at Mach 10 at 100,000 feet (Std Day).
At this rate how fast can it transit from Los Angeles to New York (2500 nm)? Hint: First, find the
Speed of Sound (in ft/sec), then determine the aircrafts velocity by v = Ma. Then convert to
knots (nm/ hour). Now remember velocity is distance per time. Solve for time. Finally convert to
minutes - ANS 25 minutes
If an aircraft is in SLUF and we know the weight of the aircraft, W, the wing area, S, the density
and velocity, what else must we know to determine the coefficient of lift of the aircraft? -
ANS We do not need any more information
@2026/2027 ALLRIGHTS RESERVED.
, An aircraft flying in standard sea level conditions has a wing area of 300 ft2, CLmax of 1.2, and
weight of 30,000 lb. What is its stall speed for these conditions? Work this problem using the
equation definition of lift coefficient, solved for velocity, which is Equation 5.18. Assume SLUF so
L = W and substitute the value of CLmax = 1.2 for the CL in the equation, then the velocity you
calculate will be the stall speed. - ANS 265 ft/s.
If an airplane with a turbojet engine produces 10,000 lbs of thrust at sea level, how much thrust
will it produce at 30,000 feet (assume Std Day)? See Equation 5.11. - ANS 3,750lbs
Referring to Figure 5.14a in the book, what is the minimum velocity this aircraft can fly at in
SLUF? - ANS 70kts
Referring to Figure 5.14a in the book, what is the maximum velocity this aircraft can fly at in
SLUF? - ANS 400kts
What is the TSFC of a T-38 at normal cruise power at 10,000 ft (Std Day)? Go to Table B.6 on
page 593 in the book or page 31 of the Supplemental Data. Note: there are three Specific Fuel
Consumption Installed. Use the TSFC for Normal Power and Equation 5.16 to correct for
altitude. - ANS 1.05/hr
True or False: afterburners are a fuel-efficient way of increasing thrust. - ANS False
If you were designing an aircraft to fly at M = 0.5 and you wanted the engine with the highest
thrust-to-weight ratio, which engine would you choose (Assume that a rocket is not an option)?
(Hint: refer to Figure 5.2) - ANS Afterburning turbofan
If you were designing an aircraft to fly at M = 0.8, what would be the most fuel efficient engine
you could choose? (Hint: refer to Figure 5.3 and lower TSFC is better...) - ANS High-bypass
turbofan
What is Thrust Specific Fuel Consumption (TSFC)? - ANS Fuel flow (lbs/hr) required to
produce a pound of thrust (lbs)
@2026/2027 ALLRIGHTS RESERVED.
