Hacker News new | ask | show | jobs
by inferiorhuman 2775 days ago
> The elevators still have some authority, you don't have to wind it from end to end to regain control.

If you're at a low altitude and managing other problems will you have enough time to even recognize the problem and then wind the cranks and recover before you hit the ground?

> Also the full range of mechanical motion is only available via the trim wheel, the electronic trim doesn't drive it to either extreme (although it can move it back to the centre from an extreme).

Can MCAS drive the trim full down? What I've read suggests that if you give it time, it can.
1 comments
VBprogrammer 2775 days ago
> If you're at a low altitude and managing other problems will you have enough time to even recognize the problem and then wind the cranks and recover before you hit the ground?

My suspicion is that it would probably have required a well drilled crew to have handled the problem correctly. But I don't think we're up there with the extraordinary levels of piloting which we've seen demonstrated previously e.g. Flight 1549 (the miracle on the Hudson).

> Can MCAS drive the trim full down? What I've read suggests that if you give it time, it can.

I'd be surprised if it can drive it outside the normal range of electronic motion. There aren't really enough details out there for me to be sure though.

link
inferiorhuman 2772 days ago
Yeah. I suspect that if MCAS played a deciding role in JT 610 the flight would have been survivable if the pilots were made aware of how the plane handles with faulty AoA data.

Although it may simply turn out that the MAX is a much more delicate plane to fly, something along the lines of DC-10 vs MD-11.

> I'd be surprised if it can drive it outside the normal range of electronic motion. There aren't really enough details out there for me to be sure though.

Yep. There are a lot of questions (at least in my mind) including why the Brazilians and Europeans (LOT, TUI) knew about MCAS and the Americans (US + Canada) and Indonesians did not.

link
VBprogrammer 2771 days ago
> Although it may simply turn out that the MAX is a much more delicate plane to fly, something along the lines of DC-10 vs MD-11.

Ha, yes that it possible.

Out of interest, where are you from and what do you do? If you find yourself in London at some point let me know. I'm sure it would be interesting to have a coffee or a pint. My email is in my profile.

link