- 5.5 A 7000-kg plane has two propellers, each of which takes in air at a rate d 45 kg/s, imparting a change in velocity of 53 m/s. If, as the plane taxies dow the runway, it accelerates forward at a rate of .12 m/s², how much drag force ae friction is acting on the plane?
- 5.5 A 7000-kg plane has two propellers, each of which takes in air at a rate d 45 kg/s, imparting a change in velocity of 53 m/s. If, as the plane taxies dow the runway, it accelerates forward at a rate of .12 m/s², how much drag force ae friction is acting on the plane?
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Question 5.5 only!!! Please

Transcribed Image Text:at speed v, the wind above the wing travels at speed vu = v + Ay and the wind
5.1 A plane has two propellers, each of which takes in air at a rate of 50 kg/s,
Section 5.1
m/s and the air below the wing travels at 500 m/s. What is the wing's lift
coefficient? If the wing's lift coefficient is described by Figure 5.3, what is the
.* 5.8 A plane is traveling at 500 m/s with a lift coefficient of 0.5. If the air above
the wing is traveling at 530 m/s, what is the speed of the air beneath the wing?
below the wing travels at speed vi = v – Ay. Show that the lift coefficient of this
5.2 A propeller is advertised to produce a thrust of 3750 lb. In testing, it is
found to accelerate air from rest to 150.0 ft/s at a rate of 21.9 kg/s. What is the
* 5.7 A plane is traveling at 700 m/s. The air above the wing travels at 800
... 5.9 Suppose an airplane wing is designed such that when the plane travels
mparting a change in velocity of 50 m/s. How much thrust acts on the plane?
at
the
is
Let
per cent difference between the advertised thrust and the actual thrust?
at s
. 5.3 A plane has two propellers, each of which takes incoming air at a velocity
of 100 m/s and accelerates it to a velocity of 200 m/s. If there is a total thrust
of 14000 N acting on the plane, what is the mass intake rate of each propeller?
belc
is g-
5.4 A plane has two propellers, each of which takes incoming air at a velocity
of 200 ft/s and accelerates it to a velocity of 400 m/s. If there is a total thrust df
20000 lb. acting on the plane, what is the mass intake rate of each propeller?
Let
5.5 A 7000-kg plane has two propellers, each of which takes in air at a rate di
Тур
a T
45 kg/s, imparting a change in velocity of 53 m/s. If, as the plane taxies dow
Wim
(In
the runway, it accelerates forward at a rate of .12 m/s², how much drag force ale
Win
friction is acting on the plane?
5.6 Confirm that Eq. (5.2) is dimensionally correct. (That is to say, co
that each term has the same dimensions or units.)
Win
the
..
dens
belo
force
angle of attack?
dens
0.23
force
dens
wing is given by
the
CL = 4
Let's call this kind of wing a Type I Wing. Hint: You mau C
two useful rules from algebra:
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