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-   -   E170/190 Angle of Attack (https://www.pprune.org/tech-log/596174-e170-190-angle-attack.html)

Amadis of Gaul 25th June 2017 20:45

What ego, O Chesty of My Soul? Airplanes flew long before the 170/190 and will long after. Physics haven't changed, aerodynamics haven't changed.

Outta curiosity, what do you plan on doing one fine day when the QRH is not available (for whatever reason)? Are you up the proverbial small river without the similarly proverbial rowing device or what?

Piltdown Man 25th June 2017 20:58

It's not too difficult to fly once you have realised what is going on. The difficult bit is working out which system/s are correct and which are wrong.

Chesty Morgan 25th June 2017 21:02

The ego part of thinking what you think looks about right is better than flying the actual pitch and attitude you need to achieve the performance you need.

The chances of not having either of the two electronic QRHs or the two paper QRHs available when we need them is minute but I guess that's why we also have a broad stroke memory item. That would also be the time to employ airmanship.

Vessbot 28th June 2017 02:13


Originally Posted by Chesty Morgan (Post 9812251)
The ego part of thinking what you think looks about right is better than flying the actual pitch and attitude you need to achieve the performance you need.

Surely you're not suggesting that one look up the pitch from a 115 cell table every time time he changes the attitude. Then what other option is there but to TLAR it first, and then fine-tune based on the performance instruments?

Chesty Morgan 28th June 2017 05:29

No.........

Amadis of Gaul 28th June 2017 14:25


Originally Posted by Vessbot (Post 9814401)
Surely you're not suggesting that one look up the pitch from a 115 cell table every time time he changes the attitude. Then what other option is there but to TLAR it first, and then fine-tune based on the performance instrument?

That's exactly what he's suggesting.

Vessbot 28th June 2017 15:15


Originally Posted by Chesty Morgan (Post 9814467)
No.........

Then what?


Originally Posted by Amadis of Gaul (Post 9814954)
That's exactly what he's suggesting.

I refuse to believe such an absurdity unless he says it explicitly. Principle of charity, and all that.

Amadis of Gaul 28th June 2017 15:47


Originally Posted by Vessbot (Post 9814997)

I refuse to believe such an absurdity unless he says it explicitly. Principle of charity, and all that.

He HAS said it explicitly. In fact, he labeled anything else "excessive ego".

Chesty Morgan 28th June 2017 15:57

No I haven't.

Vessbot 28th June 2017 16:47

So what is it?

Chesty Morgan 28th June 2017 16:53

What is what?

Vessbot 28th June 2017 16:56

What are you suggesting regarding the proper setting of pitch attitude?

Chesty Morgan 28th June 2017 16:59

I'm suggesting that to achieve the performance you require then you fly the correct pitch and power settings.

It might help you to understand that, in normal circumstances, we don't fly pitch and power.

Vessbot 28th June 2017 17:13


Originally Posted by Chesty Morgan (Post 9815133)
I'm suggesting that to achieve the performance you require then you fly the correct pitch and power settings.

That sounds reasonable. But the discussion was already at a point beyond that. So how do you know the correct pitch and power settings to fly?

Chesty Morgan 28th June 2017 17:19

No, the discussion was at the 'I know better so I'll make it up' point.

I don't. No, I can't know them all. That's why the same nice man who Amadis is going to ignore has provided them for me.

Vessbot 28th June 2017 17:34


Originally Posted by Chesty Morgan (Post 9815160)
I don't. No, I can't know them all. That's why the same nice man who Amadis is going to ignore has provided them for me.

I guess I wasn't as clear as I thought. I didn't mean knowing them as in being able to recite them to me on the forum, but rather knowing them as in applying them in the cockpit. (Flight director aside, of course.) So, while flying, how do you set the correct pitch and power?

Chesty Morgan 28th June 2017 18:06

Like I said, they're all in the QRH.

Vessbot 28th June 2017 18:32


Originally Posted by Chesty Morgan (Post 9815203)
Like I said, they're all in the QRH.

I don't understand. What do you do with this information? When I said "Surely you're not suggesting that one look up the pitch from a 115 cell table every time time he changes the attitude" you flatly said "no." So you don't look it up when you're flying, you don't memorize them all (as you've said a few times, it's impossible), then what do you do?

Chesty Morgan 28th June 2017 18:54

I use it when I need it.

We don't fly pitch or power (no airliner I've ever flown requires it), in normal circumstances, so there's no need to refer to any table, in normal circumstances.

Vessbot 28th June 2017 19:27

You've said what you don't do (many times over), but my question is, what do you do?


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