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Old 22nd October 2008 | 20:46
  #16 (permalink)  
Pilot DAR
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: CPL
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With due respect to the lost man standing, I cannot agree that the full flap go around is not safely possible. I agree that they require care, but if proper flying is executed, it can be safely done. I have done it at night, when my flap fuse blew (changing it in the dark while going around, seemed like a bad idea). I have also purposefully taken off with full flaps a number of times with no difficulty. I certainly am not suggesting others do this, but for those who would like to flame me, I will draw attention to the fact that the flight manual contains recommended flap settings, but no prohibited flap settings, I also own the plane, and planned well ahead (large frozen lake - no obstructions).

A full flap overshoot is a required design compliance element, and I am required to demonstrate that the aircraft can still do it after some aerodynamic modifications (installation of wheel skis). The text of the standard is as follows:

3.596.
(c) Balked landing conditions. The steady angle of climb at sea level shall be at least 1:30 with:
(1) Takeoff power on all engines,
(2) Landing gear extended,
(3) Wing flaps in the landing position.
If rapid retraction is possible with safety without loss of altitude and without requiring sudden changes of angle of attack or exceptional skill on the part of the pilot, wing flaps may be retracted.


If I can't make the plane safely do this, I do not approve the modification. My personal criteria is that rapid retraction is not possible, if the fuse could have just blown. It gets flown away full flaps. I do not retract the flaps at all, until I have seen a sustained climb. I'm not saying it's a great climb, but it will do it. I've even had mechanical Cessna flaps fail down! (broken flap track on floatplane) By the way, a 1:30 climb is pathetic.

There are other operations in which flap settings exceeding the flight manual recommended settings will produce results better that the recommended flap settings. Climb is not one of those.

I shall take the opportunity to glance off the comment about instructors as a measure of skill in piloting: There are good pilots, not so good pilots, and instructors. Instructors can be in either of the former catagories. I do not consider an aspect of an aircraft's handling or performance good or bad based upon the opinion expressed by an instructor, just because they are an instructor. I will listen to the opinion of a pilot's license holder with a lot of time on type, and experience on similar types. Instructors are a vitally important element of aviation, but not always the final stop for knowledge and wisdom.

There is no reason that you, as a pilot under instruction, or solo, when way up high, where it is extra safe, would not try a full flap go around, just to see how the plane flies that way. (hint, it's slow flight at full power)Things fail.... You may as well practice!

I hope that reassures you a little.

Pilot DAR
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