Posted on 03/20/2019 6:17:38 AM PDT by central_va
I have about 200+ hours in single engine and some instrument time though I never got that ticket. VFR for ever.
Ok, let me ask you pro's: Even if the elevator trim is jammed nose down (FOR WHATEVER REASON!) in a commercial jet and cannot be neutralized ( FOR WHATEVER REASON) can human strength overcome that and pull the nose up anyway?
Can someone please answer that question?
Can someone please answer that question?
What's going on here? I don't get it?
Belongs in chat. Stop cluttering news. Thanks.
If you knew anything about aviation it is a very pertinent question, so stay out of it please. Because if the answer is no I recommend you never get on one of those planes ever.
Military aviator here, not commercial.
Runaway trim is an emergency procedure and usually requires pulling a circuit breaker to stop the condition. Using brute force on a control surface at 200+ knots would require the Hulk to overcome.
At speed, control surfaces do not move a great deal (5-10 degrees as an example) and are hydraulically controlled. So the short answer is no, human strength cannot overcome the force on the surface.
Notice how nobody is answering the question because the pros know the answer is no( I COULD BE WRONG BUT I WANT TO KNOW) and that modern planes (fly by wire)are unsafe.
In a 'Fly-By-Wire' aircraft, no. There is no physical connection, IIRC......................
Modern aircraft are fly-by-wire. No manual cables. You are fighting a computer override which would require disabling the system.
The jackscrew that powers the elevator is a very heavy duty mechanical piece that has to hold the horizontal stabilizer true under load of the 737 in flight for stable flight. If the humans could do that I dont think there would be two crashed planes.
There is youtube video of the device in operation but I cant locate it.
What about fly by wire aircraft? Is the computer system nullifying the pilot commands?
The best answer is, “It depends”.
IMO modern fly-by-wire aircraft are inherently unsafe. Thanks. I thought about being a commercial pilot for a long time so this is interesting;.
Tell all the first class passengers to go sit on the aisle floor in the back of economy. Adjust accordingly. Maybe have to tell SkyDancer to go back there as well. (If she is still a first officer. If she is captain then she is the boss, so she gets to stay up front)
All modern aircraft (except light civilian craft like a Piper Cub, etc.) are “fly by wire” in that the aviator only makes his suggestion to the avionics system and the aircraft makes the requisite adjustments to the control surfaces and throttle. If the incoming data is telling the computer to do something but the pilot disagrees with it, the pilot is supposed to be able to override but there are exceptions. If push comes to shove, the aircrew are given the option to disconnect the automated system.
I am not asking that question. Just pulling the nose up with the trim set to nose down (jammed).
I hope you brought your Crescent wrench!
What a world....
Notice how nobody is answering the question...
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Nobody answers your question only 6 minutes after you post it and you want to shut down air travel?
I know I wouldn’t fly with you.
So, I'd say the answer is no.
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