Guide to Propulsion
If so instructed by your teacher, print out a worksheet page for these
After reading the
Web page Turbojet Thrust , complete
the activity to answer questions.
square piece of paper, 8.5" x 8.5", pencil with eraser, scissors, pin,
electric table fan or handheld battery operated fan.
1. What is
another name for a jet engine?
2. In the Turbojet
Thrust diagram, the free stream air enters which engine part first?
3. The air
then flows into the _________.
4. A compressor
acts like rows of ___________.
5. A compressor
also acts like an electric _____________. To see this effect, construct
a simple fan by following directions given in
6. After you
have completed your pinwheel, blow on it. Where is the best place to direct
the air to make it turn?
7. Turn the
fan on to the lowest speed and hold the pinwheel in front of it. What
happens to the pinwheel?
8. What happens
to the movement of the pinwheel when the fan is turned off?
9. What happens
to the movement of the pinwheel when the fan is turned to a higher speed?
10. Turn the
fan on and direct the air flow from it toward your hand. Describe what
11. Write a
sentence describing what the compressor does to the air in a turbojet.
what happens in the burner. What is the ratio between fuel and air?
13. How is
the action of the turbine like the action of your pinwheel?
the pinwheel to the turbine, what do you think happens to the speed at
which the turbine spins as the speed of the air increases?
15. Trace the
flow of air through the turbojet engine by listing its components in order.
16. What important
result is created by each of the following things happening?
hot gases leave
fuel is burned