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barrel roll in 172
"Big John" wrote in message ... Dudley Can it be said? In a Barrel Roll the ball starts centered and stays centered throughout the roll until aircraft returns to straight and level flight and starts some other maneuver. If you are good, you can fly a barrel roll center ball. This requires a near perfect blend of all controls and is the right way to do the classic BR. In a Slow Roll (sometimes called Point Roll) the ball starts centered and is then never centered except momentarily when bird has rolled 180 degrees and is inverted, until completion of roll and return to straight and level flight? Well...almost :-) You might lose the center ball as you pull to the roll set point but in theory it should remain more of less centered up till roll initiation. Immediately after you initiate a slow roll, you will lose a center ball as all control input through a slow roll is done in a constantly changing cross control dynamic. In theory, you should have a doghouse ball passing through the exact inverted point, but what actually is happening at this point is that you will be changing rudder to regain top rudder on the back side, so the airplane will be in a state of transition even through exact inverted. Personally, I never used a ball at all in aerobatics and I don't recommend using a ball to other aerobatic instructors. One of the benefits involved in learning to fly acro is that you learn to judge maneuver quality with your eyeballs on the nose attitude outside the airplane . All positioning is eyeball related and any unwanted yaw should be immediately apparent by watching the nose. I discourage ball use even in primary students, and get their heads outside where it belongs as soon as possible. All pilots should learn as soon as possible to judge turn quality from nose attitude behavior. I know many...many aerobatic pilots who take the ball out of their airplanes simply to save the weight and space the instrument takes up on the panel. Rolls are easy to explain face to face in briefing using hands or models and demo in air, but over Internet the nuances of English make it difficult. This can be quite true. Dudley Henriques Big John `````````````````````````````````````````````````` ````````` On Fri, 21 Jul 2006 14:43:10 GMT, "Dudley Henriques" wrote: Ron; I think what might be happening here is that some folks are defining the roll from the set point rather than from level flight. It's true that any raising of the nose from level flight will require more than 1 g, but once at the set point and initiating the roll (aileron roll) you can unload the airplane all the way down to 0 g if you like right up to the backside recovery to level flight, where the g of course has to be returned. Dudley Henriques "Ron Natalie" wrote in message . com... Big John wrote: Andrey As has been said in all the posts, the short answer is NO. 172 is not certified to do barrel rolls. However I can barrel roll a 172 only pulling 1 G which puts no more load on airframe than straight and level flight. I have thousands of hours to back up my statement. No you can not. It's not possible to even start the roll without going greater than 1G. |
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