ANN's Daily Aero-Tips (06.25.06): Adverse Yaw | Aero-News Network
Aero-News Network
RSS icon RSS feed
podcast icon MP3 podcast
Subscribe Aero-News e-mail Newsletter Subscribe

Airborne Unlimited -- Recent Daily Episodes

Episode Date

Airborne Unlimited-
Monday

Airborne-Unmanned w/AUVSI-
Tuesday

Airborne Unlimited-
Wednesday

AMA Drone Report-
Thursday

Airborne Unlimited-
Friday

Airborne On ANN

Airborne 04.23.18

Airborne-UnManned 04.24.18

Airborne 04.25.18

AMA Drone Report 04.26.18

Airborne 04.20.18

Airborne-YouTube

Airborne 04.23.18

Airborne-UnManned 04.24.18

Airborne 04.25.18

AMA Drone Report 04.26.18

Airborne 04.20.18

Sun, Jun 25, 2006

ANN's Daily Aero-Tips (06.25.06): Adverse Yaw

Aero-Tips!

A good pilot is always learning -- how many times have you heard this old standard throughout your flying career? There is no truer statement in all of flying (well, with the possible exception of "there are no old, bold pilots.")

Aero-News has called upon the expertise of Thomas P. Turner, master CFI and all-around-good-guy, to bring our readers -- and us -- daily tips to improve our skills as aviators. Some of them, you may have heard before... but for each of us, there will also be something we might never have considered before, or something that didn't "stick" the way it should have the first time we memorized it for the practical test.

Look for our daily Aero-Tips segments, coming each day to you through the Aero-News Network.

Aero-Tips 06.25.06

Trim your airplane for level flight in smooth air. Take your feet off the rudder pedals, then move the controls to bank the wings (left or right). Watch carefully to where the airplane's nose points. In many designs the nose will swing in the direction opposite wing bank. You've just seen the effect of adverse yaw.

Adverse yaw results from the drag of deflected ailerons. Say you move the controls to the right-the right aileron goes up, and the left aileron goes down. The "spoiler" effect of the raised right aileron reduces lift on that side and banks the wing to the right, but the lowered left aileron creates more drag that tends to resist the turn. The draggier the aileron (based on airplane type) the more pronounced the resulting yaw away from the direction of turn.

In some airplanes -- especially antique, tailwheel types -- there may be so much "aileron drag" that you can steer the airplane on the ground using adverse yaw. This can actually be helpful taxiing, taking off and landing in a crosswind.

Overcoming adverse yaw

Of course properly using the rudder overcomes this effect, by moving the airplane's nose back in the direction of the turn. The amount of rudder deflection needed will vary with the airspeed, power setting and the specific airplane type -- part of the fun of checking out in a new type of airplane is learning how to maintain perfect rudder coordination.

There are a couple of design philosophies that help minimize adverse yaw:

  • Frise ailerons are hinged so that the leading edge of an upward-deflected aileron extends downward beneath the wing. This creates drag on the up-aileron to counter that created by the down-aileron. The tradeoff: more total drag, causing reduced airplane performance.
  • Differential ailerons are rigged so ailerons do not deflect downward as far as they do upward. There's less drag created by the down-aileron, so less adverse yaw results. Drawback: reduced aileron effectiveness and lower roll rate.
  • Aileron/rudder interconnects in some airplanes couple the aileron and rudder controls so a movement of one creates a movement of the other. Bank the airplane with ailerons and the rudder will displace enough to compensate for adverse yaw. Shortcomings: the effect is precise through a small range of airspeeds, power settings and bank angles. These interconnects also encourage "feet on the floor" flying, leading to sloppiness in flight regimes needing active rudder input and when the interconnect-acclimatized pilot flies an airplane requiring more rudder control.

Aero-tip of the day: Actively use whatever rudder input is necessary to overcome adverse yaw.

FMI: Aero-Tips

Advertisement

More News

ANNouncement: Now Accepting Applications For Oshkosh 2018 Stringers!!!

An Amazing Experience Awaits The Chosen Few... E-I-C Note: There's very little we can say yet, but there is a reason why this may be THE year to throw in with ANN to cover the extr>[...]

AMA Drone Report 04.19.18: AMA Leadership, FAA Reauthorization, Coachella

Also: New French Regs, Drone Boot Camp, Public Safety Drone Standards, DroneShield Protects NASCAR It’s a little bit sad and yet a bit cool to see AMA make an exciting change>[...]

Airborne/Barnstorming 04.23.18: We Can Do So Much Better...

I'll Admit It... We're A Mite Frustrated, But We're ALSO Not Quitting... Ever Comments/Analysis/News/Video by ANN CEO/Editor-In-Chief, Jim Campbell We've accomplished so much over >[...]

Airborne-Unmanned 04.24.18: XPO 2018, Apple v Drones, Mosquito-Packed Drones

Also: Osage Nations Repurposes Airpark, UAV/Drone Certification, Leonardo's M-40 Target Drone, GA-ASI Flight Deck Taxi Only a few more days to go... THE major unmanned exposition o>[...]

Airborne 04.23.18: Hemisphere Suspended, Thunderbirds Fly, Apple v Drones

Also: New NASA Administrator, AD For CFM56-7B, Engine Display Upgrade On C-441, First BBJ MAX Textron Aviation has suspended work on the Citation Hemisphere large business jet, cit>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

© 2007 - 2018 Web Development & Design by Pauli Systems, LC