Transcript Tailwheel Ground School

Tailwheel Ground School
Tonight’s Overview
• Basic Tailwheel Aerodynamics
• Taxing
• Takeoff Techniques
• Landing Techniques
• Are we airworthy to go flying?
• Questions
Basic Tailwheel Aerodynamics:
Lateral (Roll) Stability
• Does a stable airplane roll
away from or into the
wind???
• Dihedral Effect
– Dihedral Angle
– High wing vs. Low wing
– Swept of the wings
Dihedral Angle
Basic Tailwheel Aerodynamics:
Directional (Yaw) Stability
– Does a stable
airplane yaw into or
away from the
wind???
– Weathervane
– CG Location
– Adverse Yaw
Weathervane
(If you do not understand this well enough to teach it your grandma and
have her understand it, you have no business flying a tailwheel
airplane. I am serious)
Weathervane
CG Location
(If you do not understand this well enough to teach it your grandma
and have her understand it, you have no business flying a tailwheel
airplane. I am serious)
Adverse Yaw
Taxing
• Stick into wind! Or away from?
• Stick back or forward?
– Why not neutral?
• Taxi Speed
• Usage of brakes
Taxing
• S Turns
• Strong Crosswinds
• Unlocking and locking of the tailwheel
Takeoff Techniques
• Normal
– Keep stick back until you sure you will lift the
tail
– Gyroscopic Precession
• X-Wind
– Stick ALWAYS INTO the wind on takeoff!!!
• Common errors
Landing Techniques
• Techniques
– Three Point Landings
– Wheel Landings
– One Wheel Go-Arounds
• MAKE SURE YOUR FEET AREN’T ON
THE BRAKES!!!
– http://www.youtube.com/watch?v=o4oOhumK
co4
Crosswind Landing Techniques
• How do you tell where the winds are from with
no ATIS/AWOS or windsock info?
• DO NOT touch down sideloaded!
– Go around if you aren’t aligned with the runway
– The best pilots use their superior decision making
skills in order to avoid having to use their superior
piloting skills
• How are the controls positioned?
• Which wheel touches down first?
Three Point Landings
•
•
•
•
Attitude
Stick full back and keep it there!
Be ready to dance on the rudders
Common Errors
Wheel Landings
• Just like in this picture!!!
Wheel Landings
• Pattern difference – AS and Power
• What is the acceptable order for which the
wheels touch down?
• How much to stick forward?
• Ready to dance? Rudder more effective!
• When to bring stick full back?
• Common Errors
One Wheel Go Around
•
•
•
•
•
Like a wheel landing yet…
AS and power diff.
Controls diff.
S Turns??
Common Errors
Are we legal to go flying?
• What to check:
– Annual
– 100 hrs
– AD’s
• Where are they located?
• When in doubt?
Securing The Cub
•
•
•
•
•
Write tach times down in logbook
Tie Down/Chock wheels
Disconnect the battery and charge it
“Check in” on MyFBO (pay)
Clean any residual of oil around cowling and
windshield
• Wipe down all leading edge surfaces
• If tied down outside:
– Tie the stick back with the seatbelt
– Close windows and doors
– Put on Proplock
Quiz time!
• A pilot performs a takeoff roll in the Cub with no crosswind
corrections. The wind is strong and from the left. Please fill in the
following blanks: The Cub will start to turn _?_ (away from, into) the
wind due to _?_ (dihedral effect, weather vain stability, scuff effect).
This turn is due to lack of proper _?_ (elevator, rudder, aileron)
control.
• As a result, the Cub will be on the _?_ (upwind, downwind) side of
the centerline. The proper placement of the ailerons when on this
side of the centerline would be _?_ (towards the centerline, away
from the centerline, into the wind, downwind). The effect that can
further aggravate this yawing situation is _?_ (dihedral effect,
adverse yaw, spiraling slipstream). The airplane will tend to roll _?_
(away from, towards) the wind due to _?_ (dihedral effect, adverse
yaw, weather vain stability).
• Having the down wind wing down in a tailwheel airplane is _?_
(stable, unstable). The proper correction for this situation would be
_?_ (downwind, upwind) rudder and ailerons _?_ (towards the
centerline, away from the centerline, into the wind, downwind). The
worst thing that can be done in this situation is to apply _?_
(downwind, into the wind) ailerons.
Questions?