Ted Fancher · Aug 05, 2003 12:35 AM
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Not surprisingly, I'm going to agree with a lot of what Brett and Len and a few others have said and disagree at least in part with my good friends Larry and Claus. I precede my comments with the caveat that every one has opinions...these are just mine.
Brett is absolutely right (as was Larry when he first broached the possibility) it is entirely possible for someone to beat another flyer with demonstrably inferior equipment. This can be done by simply overwhelmingly superior talent (Bart Klapinski whipping all the best OTS ships in the country at VSC flying his little Travel Air bipe with a really, really old K&B .29) or a combination of exceptional talent and a lot of practice flying a pretty ordinary airplane (discretion being the better part of valor I'll let each of you pick your own examples).
The fact that a particular individual won a given event is evidence...but not proof...of the possible superiority of his "stuff". I've flown a number of "OPPS" (other people's planes) over the years and can state without reservation that a few of them were superior to my own on that day...notwithstanding the fact that I may have beaten them on that day with my own "stuff".
A couple particular examples. Brett's Infinite is almost the closest thing to a perfect stunt ship I've ever flown...and that opinion is shared by many others who have flown it. He's never beat me at a "major" comp with the ship yet but, there is no question it is a superior airplane. Bobby Hunt's Saturn was a close second in my personal ranking of OPPs I've flown. I flew it after I won the '95 Walker Cup and Bobby came in, I think, fourth. Still counting my blessings for coming out ahead of a truly great pilot and a fantastic airplane.
The beat goes on. The point is that winning or losing is, once again, not proof of superiority of "stuff". I think we can put that canard to rest.
Yes, once again, you can fly stunt with a stiff arm and a biased handle. Happens all the time and some very good flyers have done very well with the biased handle. Not so common is the stiff, straight arm.
My feeling is that flying an exceptional pattern on a regular basis would be extremely difficult with the straight arm pumping up and down in the fashion in which many have learned to fly. I think that approach is flawed not only for flying the pattern but also for even learning to fly. The awful truth is that once learned, flawed techniques are almost impossible to overcome once they've become ingrained. My "palm up" inverted flight being a perfect example. Nobody taught me to do that but that was the way I learned. Alas, there is no doubt in my mind that if I tried to fly inverted with my hand upright tomorrow I would crash! Fortunately, although I fly inverted that way I've no similar tendency during maneuvers...thank heaven. Inverted flight is pretty simple and I can and have lived with flawed technique in that regard without great detriment to my "career".
On the other hand, I have seen (as we all have) pilots who somehow have taken this handle position thing right on into their maneuvers and have endless trouble trying to do things like outside squares and square eights with their arm and hand all distorted trying to keep the palm "up" or "down" or even, in cases almost painful to contemplate, with the down line "up", their hand twisted as close to 180 degrees as anatomy will allow to somehow keep "up" "up". Awwwk!
Dougie Moon mentioned the pencil analogy and I just loved it because that was precisely my thought process when I read of the relative acceptance of the stiff armed, biased handle method. We are, in fact, drawing pretty pictures on our spheres and, because our art is "reality based" rather than abstract, we pretty much have to do our figures as Mother Nature invented them...no allowances made for "creative" embellishments! My funny way of saying we're flying "precision aerobatics", not stunt.
Let's take that pencil analogy a step further than Dougie did. Pencils are used for writing stuff. Now, you can, I suppose, write stuff with a pencil by holding your arm straight out and moving it up and down and sideways and, with enough practice, your penmanship might work its way up to a gentleman's "C" but it will be darn hard to keep it that way and almost impossible to get really good at it...especially if you're a Doctor and you've got to write prescriptions in that tiny script so popular with the MD set.
The point is that penmanship is a nuanced task requiring adept usage of fine motor and muscle skills. Flying a stunt pattern makes much the same demands on our neuro-muscular skills. Sure, you can make the ship go up and down by moving your arm up and down and you can do some tricks by biasing your wrist down to "equalize" the up and down movement available. You can do the equivilant of block letter printing that way.
If, on the other hand, you want to do a little calligraphy on the sphere with a few nuanced seriphs and some subtle punctuation, you're going to have to utilise the same sort of fine motor skills the expert penman needs to use. The good stunt flyer does this with nuanced finger pressures, excellent balance, very fine movements and the avoidance of large motor inputs such as raising and lowering the entire arm for any up and down control input.
Several reasons for avoiding the large motor inputs. First of all, every time you move your arm up or down or left or right in gross fashion (emanating from the shoulder)you alter the airplane's perception of "where" the control is coming from. Every such gross movement moves the inboard wing and all attached to it in the direction you dragged the handle. All the fine tuning of yaw and roll trim is negated by such inputs.
Second, time. It takes time and a large range of motion to input the control necessary for a square corner when moving the entire arm. A square corner is measured in modest parts of a single second of time. To suggest that a refined and controlled corner of the proper radius can be accomplished repeatedly by such gross inputs is not a likely prospect.
Note, by the way, that I limited my negative comments about arm movement to left and right and up and down. Left something out, didn't I? The only arm movement you'll see from the vast majority of top twenty flyers is movement away from and toward the airplane. The equivilant of adding or subtracting energy from the airplane. Moving the handle toward you adds energy by accelerating the airplane, a form of whipping. Very useful in many parts of the pattern especially when flying in adverse conditions.
More rare but also of occassional value is moving the arm toward the airplane (or stepping toward it). This takes energy away from the airplane and can be used to unload it a bit to take some of the "surge" out of corners. Gene Schaeffer, one of the finest flyers to ever come out of the east coast (and, yes, I'll readily admit there were and are a bunch of them) would routinely step into his ship at the last bottom corner of the hourglass, effectively slowing and unoading the airplane enough to make the corner sharper and flatter.
Finally, let's put to rest the belief that the handle must be biased down because, after all, if the arm is held straight out with the fingers parallel to the ground there is very little "up" movement available and much more "down", ergo, neutral must be located somewhere half way between...biased down.
Now, if we were place in a strait jacket with our flying arm and upper chest in a cast out to but not including the wrist, there would be some ligitimacy to this position. But, for the most part we simply don't dress that way to fly our toys. Lacking such constraints we quickly learn that we've got a multitude of available source with which to apply "up" control and we can use and and or all of them depending on the demands of the moment. Available and useable sources for down control are much more limited.
For "up" control we can use: 1. fingers; 2. wrist; 3. *elbow*; 4. shoulder joint; and our feet (moving back to transmit energy and increase our mechanical advantage..did you think of that one?) For "down" control we are practically limited to: 1. fingers; 2. wrist; 3. (in an emergency) the shoulder and, yes, the feet.
For practical purposes our down control is limited to what we can achieve with our wrist and fingers. Let's examine why this is true.
The overwhelming difference between up and down control is the elbow. The unfortunate reality is that the elbow only bends one way and for us, that's "up". It's a huge advantage for the following reasons. Not only does it give us an additional "hinge" for up inputs, it also satisfies the criteria of not moving the handle significantly up or down when it is flexed. In the "preferred" (by some)vertical handle, slightly bent elbow neutral position control inputs achieved by bending the elbow results in the hand merely moving toward the pilot thus adding energy to the airplane and not inputting an usettling roll that would be caused by raising the whole arm for the additional input.
Further. In the event that even more control is needed the shoulder can be employed to the point that the handle has turned a full 90 degrees giving absolutely maximum deflection available and the hand still only raises a few inches above its position at neutral.
Pretty good stuff for the insides, huh!
The outsides on the other hand are a great wasteland!
The problem with inputting outside control is the inability to use the elbow. After we've got all the down wrist and finger flexes into the deal there is nothing left that doesn't include some bad stuff. Since the elbow don't go that way we must resort to the next joint which is the shoulder. Down inputs from the shoulder require by physics that the entire arm be moved down. We can't bend the elbow that way and move our hand back in a more or less straight line the way we can with up control. This inputs a roll to the aircraft due to dragging the handle down, requires a lot more muscle since the input is made at the end of a long "arm" ... your arm ... and (because you've got to move the entire arm a long ways to achieve the same handle deflection that comes from a much smaller movement by the elbow in up control) requires a whole bunch more time to accomplish. Lastly, fine control of that outside corner becomes very problematical because of all the foregoing use of large muscle groups and long period amplitude movements. It just isn't a very good way of making precision maneuvers.
All of the foregoing is my way of trying to explain why, from a purely physiological standpoint, there is very much a good way and a not so good way (not to say right or wrong)to hold the handle.
This has gone on way too long and I've got to get to bed. Next time I get a chance to yammer on a while I'll discuss the issue that started all of this, why there is a good argument for a handle of a certain configuration.
Ted
Chris