Fox And Mcdonald's Introduction To Fluid Mechanics
9th Edition
ISBN: 9781118921876
Author: Pritchard, Philip J.; Leylegian, John C.; Bhaskaran, Rajesh
Publisher: WILEY
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Textbook Question
Chapter 9, Problem 128P
The U.S. Air Force F-16 fighter aircraft has wing planform area A = 300 ft2; it can achieve a maximum lift coefficient of CL = 1.6. When fully loaded, its weight is 26,000 lbf. The airframe is capable of maneuvers that produce 9 g vertical accelerations. However, student pilots are restricted to 5 g maneuvers during training. Consider a turn flown in level flight with the aircraft banked. Find the minimum speed in standard air at which the pilot can produce a 5 g total acceleration. Calculate the corresponding flight radius. Discuss the effect of altitude on these results.
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A sign ABCD is constructed from 5 mm thick plate steel
(density p=8000 kg/m³) with the geometry shown in the
figure. The sign is connected to the wall by a pin at A and
also supported by member BE. Support member BE is also
constructed from 5 mm thick plate steel and is connected by
pins at B and E respectively. Determine the reaction forces
at A and E. Enter your answers in Cartesian components.
The weights of both the sign ABCD and member BE
should be accounted for in the calculation. Assume the pins
cm away from the ends at each
are located a distance
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connection.
W
E
CC +
BY NC SA
2016 Eric Davishahl
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2
B
C
D
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Values for dimensions on the figure are given in the following
table. Note the figure may not be to scale.
Variable Value
a
2.4 m
b
2.88 m
с
1.2 m
h
1.152 m
ω
7 cm
The reaction at A is A
-1265
The reaction at E is E
3291
0
× i-
✓
× ĴN.
=
0
* i+
× ĴN.
Answers in box are incorrect so need help, please show all work, steps, units and round to 3 significant figures. Thank you!
Compute the coordinates of the centroid (x, y) of the area
shown.
y
y = a√√√bx
X
BY NC SA
2016 Eric Davishahl
Values for dimensions on the figure are given in the following
table. Note the figure may not be to scale.
Variable Value
α
4.5 in
b
1.6 in 1 (Note the -1 exponent only applies to
the unit, not the number.)
с
6 in
The coordinate of the centroid is =
4
☑ in.
The y coordinate of the centroid is y =
11.4
☑ in.
Chapter 9 Solutions
Fox And Mcdonald's Introduction To Fluid Mechanics
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