svcta
"Kids these days"-AAflyer
- Joined
- Nov 14, 2004
- Posts
- 1,767
That is what you THINK. It is not true. It has been shown in the SIM and I have seen it over and over again with many students. If given the failure (between 80 kts and V1) and you simultaneously make your go/no-go decision and the failure is also immediately removed, most pilots can't tell you exactly what the failure was accurately with 100% certainty. You might be in the ballpark, and you might get lucky with a 50/50/90, but generally, you haven't had enough time to determine which light is blinking at you and why or what has failed or why you have lost control, etc.
(Edited to clarify that we are talking about the few seconds between 80kts and V1)
**Also, it depends on how close 80 kts is to V1 speed, obvisously.
We do this very thing in the sim every recurrent. You're right that I have seen guys reject for a trivial message or failure in the high-speed envelope, but I can't recall being caught by it yet, mainly because of the reasons I pointed out. And I rely heavily on a strong right seater to keep me in the loop when I'm in the left seat. There are way more stories of airplanes overrunning a runway than there are of ones going flying with a problem. This is more of a crew issue than a philosophy issue. The person in the right seat has no other job other than to monitor the airplane during the takeoff roll. If he's sitting there staring out the window then you're gonna get caught. But you scan the cockpit effectively during the takeoff, you can see most of these problems before a message appear, or before a light would come on. There are only 3 basic high-speed reject items.
How hard is it to detect a loss of directional control?
How hard is it to recognize an engine failure?
How hard is it to recognize a fire?
You would both have to be unconscious to misread two of those three things. The first two have the same symptom (and cure), so it's almost one item. The third is pretty simple, A big, red light, or CAS message and a triple chime or ringing fire bell. Either way, you ask yourself, is that a fire message? Yes=Stop, No=Go. That's not high level math, and my experience in the sim is that it works very well. Guys get caught in the sim because they are expecting an engine failure somewhere prior to or at V1, so at the first sign of trouble they slam the throttles shut and stand on the brakes. More sim instructors should include non-reject occurrences this way, to train out this bias toward the high-speed reject. Indication are, from my experience, that this is a simism. Because I've flown with same people in the past, who when on the runway hauling azz, continued the takeoff as they should have when a nuisance light came on.
I agree that judging the perception of an unflyable airplane is tougher to judge, but it probably involves more senses than just your eyes.
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