1. Helicopters By Ricky Toronis
Picture from www.military-
today.comhelicopterskamov_k
a50_hokum.htm

2. Introduction to flight
• The four main forces in flight are; weight, lift,
thrust, and drag
Lift
Thrust Drag
Weight

3. The secret to helicopters flying
• Helicopters
fly because
of the
unique
design of
their
blades

4. The aerofoil
http://www.aerospace-
technology.com/projects/ab139/images/1-
aw139-helicopter.jpg
Picture from:
http://www.choppertheory.zoomsh
are.com/my_images/aerofoil.gif

5. How Bernoulli has
influenced the aerofoil
Bernoulli discovered that the wind
on the top the aerofoil travels faster
than the air on the bottom
Picture from:
https://faasafety.gov/files/gslac/FTB/Helicopte
r%20Aerodynamics/Fig2-2.JPG

6. However
• Bernoulli was not entirely
correct
Picture from:
https://faasafety.gov/files/gslac/FTB/Helicopte
r%20Aerodynamics/Fig2-2.JPG

7. How Newton has influenced the
aerofoil
Based on Newtons
third law; every
action has an equal
and opposite
reaction. The aerofoil
creates a downward
wind (downwash),
which causes the Picture form:
aerofoil to lift http://4.bp.blogspot.com/-
M3cWlKTcni0/TZov_cTwi4I/AAAAAAAAABY/8xx
VrH-JshQ/s1600/airfoil.jpg

8. Its blade spin until they get
fast enough, creating How a helicopter
enough downwards wind takes off
to overpower the weight
force.
Picture from:
http://science.howstuffwor
ks.com/transport/flight/mo
dern/helicopter.htm

9. What is the tail rotor of a
helicopter for?
The tail rotor helps keep
the helicopter straight
Picture
from:
http://sci
ence.ho
wstuffwo
rks.com/t
ransport/
flight/mo
dern/heli
copter.ht
http://www.jascman.com/tail- m
rotor/ ^

10. How a helicopter moves around
A helicopter moves around by
tilting its whole body
Picture from:
http://science.howstuffworks.com/transport/fl
ight/modern/helicopter.htm

11. Bibliography
• http://www.boeing.com/companyoffices/abo
utus/wonder_of_flight/how_things.html
• http://www.minihelicopter.net/howdohelicop
tersfly/index.htm
• http://science.howstuffworks.com/transport/f
light/modern/helicopter.htm
• http://www.helis.com/howflies/
• http://en.wikipedia.org/wiki/Helicopter

12. THE END
Picture from:
http://weaselzippers.us/wp-
content/uploads/2011/05/apache-
helicopter392522.jpg