
Beginner's Guide to
Propulsion
Forces in a Climb
Activity
If so instructed by your teacher, print out a worksheet page for these
problems.
Before you begin:
Open the Beginner's
Guide to Propulsion. Under Aircraft Motion, open the slide
entitled Forces
in a Climb. Use the information available in the slide to help you
complete he activity. A Boeing 737600 takes
off from a major airport at a speed of 160 knots. At 15,946 feet from
the liftoff point this plane must be 2812 feet (about 1/2 mile) high.
 Assuming the angle
of ascent is a constant, find the angle the plane must use to achieve
this height at this distance to the nearest degree. Make a diagram
and explain how you arrived at your answer.
(Open the Beginner's Guide to Propulsion
and open the slide Forces
in a Climb under Aircraft Motion.)
Note: Don't forget to change radians to degrees.
 We are going to
use this information to find vertical and horizontal net forces.
a. Find the thrust for a Boeing 737600 airplane.
To find the thrust of the airplane go to
Boeing
737600 (http://www.boeing.com/commercial/737family/pf/pf_600tech.html) page.
Thrust =____________
b. What is the take off weight of the plane?
Change this weight to Newtons
Weight in lbs. = ___________ Weight in Newtons =___________
c. Use the first equation on the Forces
In A Climb page to find vertical net force.
Use 700,000 N as the lift and 35,000 N as the drag.
Show the original equation and then show the substitutions with your
answer. Label answer with correct units.
d. Use the second equation to find the horizontal net force, use lift
and drag from part c above.
Show the original equation and then show the substitutions with your
answer. Label answer with correct units.
 Divide your net
force from 2c and 2d by the weight of the airplane to get the vertical
and horizontal acceleration in "g's" (ratioed to gravitational acceleration).
a. Vertical acceleration = _________________g's
b. Horizontal acceleration = _______________g's
