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Forum: Tech Log

2nd Feb 2021, 21:26

Replies: 114

Was MCAS needed?

Views: 28,293

Posted By PEI_3721

Bergerie, '… a better solution' We might assume...

Bergerie, '… a better solution'
We might assume that a STS type of fix was considered / tested.
STS as I understand is only a single trim input, also like the 747 example it uses speed as the...

Forum: Tech Log

2nd Feb 2021, 13:58

Replies: 114

Was MCAS needed?

Views: 28,293

Posted By PEI_3721

'… why did Boeing go through with MCAS and not...

'… why did Boeing go through with MCAS and not just simply declaring the behaviour and asking for relief? '
This is likely to be the financial 'dazzle' of commonality with previous versions.
The...

Forum: Tech Log

1st Feb 2021, 21:32

Replies: 114

Was MCAS needed?

Views: 28,293

Posted By PEI_3721

"Lets try and do it right from the beginning."

Hi gums,
'… how the 'bus got certified with no control feedback …'

The simple answer is that they rewrote the rules. Airbus chose not to use stick force as a cue for speed, instead argued the...

Forum: Tech Log

31st Jan 2021, 09:32

Replies: 114

Was MCAS needed?

Views: 28,293

Posted By PEI_3721

fdr, thank you for the extensive background. ...

fdr, thank you for the extensive background.

Re 'angle grinder' fixes. One of the first western public conferences where TsAGI presented a paper on high alpha aerodynamics. - In answer to a...

Forum: Tech Log

16th Jan 2021, 12:55

Replies: 114

Was MCAS needed?

Views: 28,293

Posted By PEI_3721

gums, Detent, et al, caution with specific...

gums, Detent, et al, caution with specific comparisons.
Following on from zzuf, good refs; - associating the A320 with feel and bob wts could be misleading.

Airbus chose the combination of...

Forum: Tech Log

15th Jan 2021, 21:19

Replies: 114

Was MCAS needed?

Views: 28,293

Posted By PEI_3721

td, "For some reason, it never got any traction...

td, "For some reason, it never got any traction with the other authorities."

Perhaps Boeing didn't put this option up front because it wasn't a solution to their $1M/aircraft 'min differences...

Forum: Tech Log

13th Jan 2021, 21:14

Replies: 114

Was MCAS needed?

Views: 28,293

Posted By PEI_3721

gums, re your post #19, Apologies for my my...

gums, re your post #19,
Apologies for my my cryptic #13 which was a reference to your previous post '13' in this thread, minimising thread clutter with endless quotes.

We are dancing around the...

Forum: Tech Log

13th Jan 2021, 10:15

Replies: 114

Was MCAS needed?

Views: 28,293

Posted By PEI_3721

Swatting bugs around a cowpat

Yo gums, #13 Let's swat some 'bugs'
The design concept of MCAS was fine. It met the objectives - as misguided as they appear to be with hindsight.
However, it was the engineering implementation...

Forum: Tech Log

12th Jan 2021, 21:28

Replies: 114

Was MCAS needed?

Views: 28,293

Posted By PEI_3721

As #9 MCAS was required to meet stick force...

As #9 MCAS was required to meet stick force requirements; it was not directly related to the stalling characteristics. The comments about stalling could relate to acceptability if MCAS had been...

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