Tailwheel Ground School Tonights Overview Basic Tailwheel Aerodynamics

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=o 4 o. Ohum. K co 4

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 My. FBO (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?