Re: "Darting" to Left on Slow Speed Taxi
David J. Gall
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Merry Christmas to you, and to all on the Q-List!
David J. Gall
From: main@Q-List.groups.io <main@Q-List.groups.io> On Behalf Of Jim Patillo
Sent: Wednesday, December 23, 2020 12:01 PM
Subject: Re: [Q-List] "Darting" to Left on Slow Speed Taxi
David, you are still a funny guy! Corbin is just earning his Quickie Wings.
Hope all is well with you and your family. Do you still live in CA or are you domiciled somewhere else? I don’t hear you on NorCal.
Sent from Outer Space
From: main@Q-List.groups.io <main@Q-List.groups.io> on behalf of David J. Gall <David@...>
So you’re taxiing downwind at idle at 15 kts. with a tailwind gusting 18-26 kts. from 20 degrees to the right off your tail. Basically, your vertical stabilizer/rudder is at zero airspeed gusting to -10 kts. airspeed. Any change of wind direction to be more from the left off your tail is going to be changing the roll moment imparted by the wing dihedral as much as the yaw moment imparted by the vertical stab/rudder. I think almost any taildragger would behave similarly, but the Quickie main gear is known to be a little more responsive to roll coupling than other planes. Did it do anything similar on the taxi back to the hangar when you had a headwind? If not, I’d diagnose it as “Corbin flies his Quickie when mere mortals cower in the hangar.”