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#1
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It is not just the flap deployment altering airflow over the stabilizer
that causes a tail plane stall - though that is a major problem for many airplanes - but it is also the slowing up with flap deployment which forces the horizontal stabilizer to fly at a higher angle of attack (downward attack, of course)... So T-tails need to be flown exactly the same way as straight tails... If the ship has a load of ice (weight) forcing the airfoils to fly at a higher angle of attack to begin with and the stab has ice distorting it's airfoil, then increasing the angle of attack even further by slowing up will/can be the final straw leading to an accelerated tail plane stall followed instantly by the nose pitching downward sharply..... If you are iced up, forget the flaps and keep the speed up until the wheels are just above the runway... It is far better to deal with a possible low speed over run off the end of the runway, than a pitch over at a few hundred feet of altitude where death is certain... Thunder bumpers, fog, and icing, are ABSOLUTE no-go situations for me... Remember this old saw, because it is absolutely true: There are old pilots... There are bold pilots... But there are no old-bold pilots... Denny |
#2
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Denny,
Is is our modus operandi too. As I mentioned in my reply to Bob Gardner, we attended the Wing Safety Seminar on Winter Operation last November. Our thought was that we would never let it happen to us ! Little did we know that we would encounter icing in a short local excursion on a day which we thought was perfect for flying. BTW, the urgent weather warning which I received was through my-cast, a 'regular' and not aviation weather servcie. The TAF for Albany area mentioned drizzle rain but much later in the day. POU TAFdid not indicate any precipitation, 1B1 is between the two airports. The very short duration of the freezing rain indicated that it could be very local, just under a rain cloud. We might not have encountered it if we were few miles East or West. |
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Thread | Thread Starter | Forum | Replies | Last Post |
Issues around de-ice on a 182 | Andrew Gideon | Piloting | 87 | September 27th 05 11:46 PM |
Rain and autopilot unstable | W9MV | Owning | 3 | May 18th 04 08:51 PM |