ASE 367K
Quiz
#
Closed Book
2
1. (30pts) Consider the quasi-steady gliding flight (T=O) of an Ideal Subsonic Airplane (ISA).
a. (10) List the equations of motion for quasi-steady gliding flight.
List the functional relation for the drag. List the variables, and
show that there is one mathematical degree of freedom.
b. (10) Derive the formula for the horizontal distance traveled as the
airplane descends from ho to h f < ho in terms of the unknown
velocity profile, that is,
xf -
Xo
= 2E* lhfrho
u2 +dh
u4
.
c. (10) Derive the formula for the velocity profile for maximum distance and the formula for maximum distance.
2. (20) Consider the take-off ground run of an ISA. The differential equation for the ground run distance is given by
dX
dV -
W
V
9 (T - JLW) - (1/2)pS(CD
-
JLCL)V2
Explain why each quantity on the right-hand side of the equation (except for the velocity) can be assumed· constant.
3. (50pts) Define briefly (words, formulas, figures, etc.)
items:
a. (5) stall speed
g.
h.
b.
specific
service
effect
ceiling
energy
J.
(5)
Ps
energy
plot
maneuverability
d.
e.
c.
f.1. (5)
(5)
(5)·ground
rotation
rate
friction
flight
ofenvelope
climb
force
speed
the following