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Don Johnstone wrote:
At 19:00 11 July 2006, wrote: Nor do I believe that reducing ones airspeed from 75 to 65 can increase ones L/D tenfold. I can assure you that ground effect is real and will keep you in the air far longer than you might think. One of the demonstrations that I gave students was an approach over the runway threshold with 65-70knots at 5 to 10 ft in a Grob 103 no airbrake. I was able to show that the glider would still be flying when the end of the 10000 ft runway was reached. Admittedly the second half of the runway is slightly downhill but if the airbrakes were not opened we would 'miss' the runway. A worthwhile demonstration, both for those times in the future when the student may wish to land, and for those times when he may not. As leisurely as this sport sometimes seems to the outsider or to the beginner, we don't often enough take the time to improvise new insights for one another. There ought to be a lot more dual flights in clubs than there are, and not necessarily with a CFIG in the other seat. There is a vast reservoir of experience, and finesse, that is not being passed along to low-time glider pilots. We don't use the team approach of the fighter community where the fledgling jock spends a few years on the wing and proves himself ready before becoming an element lead and later a flight lead. Nor do we have the virtual apprentice system of airline operations, where the first officer will see it all, and more than once, from the right seat -- in daily operations and in the simulator -- before it's time for him to move to the left seat. What we do have is the total reliance on sight and touch and sound as a small quiet and vulnerable guest in these footless halls of air, living by our wits, yet with a training syllabus too closely related to the needs of that bull-in-a-china-shop known as an airplane with hundreds, or thousands, or tens of thousands of horsepower allowing its pilot to bluff his way from point A to point B. It's harder to move forward when every generation has to reinvent the wheel. Jack |
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