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<head><title>One Hand On The Yoke</title></head><body><h1><img src="logo.gif"> One Hand On The Yoke</h1>An airplane's direction and attitude is controlled primarily by a 3D steering wheel called a &quot;yoke&quot; (plus other inputs like the rudder pedals, which don't bear on this story). When my father-in-law first showed me how to fly, I immediately grabbed the yoke with both hands. We bounced around a bit. Then he showed me how much smoother I could fly straight and level with only one hand on the yoke.
<p>An airplane is a much more sensitive control situation than a car. Small changes to the inputs are very noticeable. Something about the need to coordinate the pressure of two hands generates many, many of these small inputs. Counter-intuitive as it feels at the time, 10,000 feet up in a tiny little cigar tube, letting one hand go is the right way to solve the problem.
<p>Now, when you do a manoeuver, you do hold the yoke with both hands. Then you need the power provided by both armsful of muscles. At least you want that power available, and you are willing to pay the price in a little wiggliness, at least for the duration of the turn.
<p>An <a href="http://c2.com/cgi/wiki?ExtremeTeam">ExtremeTeam</a> is sensitive to small inputs. Much better to let one hand go and trust the self-organizing culture they have developed. Most of the time.
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Another example of this is my rolling suitcase. The wheels are too close together, so it often starts oscillating between the wheels, eventually falling over. I tried grabbing tighter, which started the oscillation sooner and toppled the suitcase sooner. The solution is to pull the dang thing with one finger. Occasionally (but much less often) it still begins to wobble. I slow down until it stops.
<p>--<a href="KentBeck.html">KentBeck</a>
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<a href="http://c2.com/cgi/wiki?SteerWithYourEyes">SteerWithYourEyes</a>
<hr><a href="http://c2.com/cgi/wiki?edit=OneHandOnTheYoke">EditText</a> of this page (last edited January 13, 2000)<br><a href="http://c2.com/cgi/wiki?FindPage&value=OneHandOnTheYoke">FindPage</a> by browsing or searching<p><font color=gray size=-1>This page mirrored in <a href="index.html">ExtremeProgrammingRoadmap</a> as of March 31, 2001</font></body>
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