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    Boeing has its arse in a sling

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    Boeing has its arse in a sling Empty Boeing has its arse in a sling

    Post by Admin on Mon Mar 18, 2019 11:13 am

    ddavid
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    Post by ddavid on Tue Mar 19, 2019 5:49 pm

    I'm not impressed. Always thought Boeing engineers were the best - but the accountants obviously won with the Max.

    Cheers - Dai.
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    Post by ddavid on Fri Apr 12, 2019 7:59 pm

    Some more info on Boeing's decision to resolve the pitch-up problem with the newer, bigger engines by introducing MCAS (software) rather than redesigning the horizontal stabilizer and elevator set up. This video explans:



    Be interesting to see how Boeing gets out of this...

    Interesting, also, that Trump decides to increase duty/taxes on aircraft imported from Europe. Is this related?

    Cheers - Dai. Cool
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    Post by Admin on Sat Apr 13, 2019 8:53 am

    this is a red herring, and completely wrong, he needs to go back to school or at least learn the basics of flying
    in both accidents the pilots were pulling back on the control columns because the mcas system was pushing the nose down, it was certainly not a deep stall situation, quite the opposite, deep stalls are virtually impossible in twin a/c because there is not the weight of three engines at the back , the 727 or trident could suffer a deep stall because the T tail if it did get in the shadow of the wings would have a very nose high attitude and this combined with the weight of 3 engines at the rear could create a deep stall . however if a deep stall occurred in a twin engine under the wing layout all the pilot needs to do is reduce power and the nose will drop naturally and will not require aerodynamic effort from the elevators becuse the weight of the engines is in front of the center of gravity.
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    Post by ddavid on Wed May 01, 2019 11:43 am

    Here's another view on the MCAS problem:

    https://spectrum.ieee.org/aerospace/aviation/how-the-boeing-737-max-disaster-looks-to-a-software-developer

    My experience in process control automation software, admittedly in the 70's, supports a lot of what he says re software 'hacks'. Also, it's interesting how he brings the C172 into the discussion as well as that O-ring problem on Challenger. A good read ...

    Cheers - Dai. Cool
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    Post by britfrog on Thu May 02, 2019 9:03 am

    this article is interesting a pity the russians , who stopped giving any 737 a certificate of airworthiness dont elaborate on why

    http://avherald.com/h?article=4c534c4a/0052&opt=0
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    Post by ddavid on Sun May 05, 2019 7:59 pm

    All this reminds me rather vaguely of Michael Crichton's novel "Airframe", where the pilot 'battled' against the AP, or similar.

    You know, it's definitely going to end badly for Boeing...

    Cheers - Dai. Cool




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    Post by ddavid on Fri Jun 28, 2019 12:14 pm

    More info:

    FAA finds potential flaw in Boeing 737 Max software updates:

    https://www.nbcnews.com/news/us-news/faa-finds-potential-flaw-boeing-737-max-software-updates-n1022516

    There's this, in the text:

    "Boeing has traced the issue to a microprocessor and how the chip handles data, but believes it can address the issue with a software code update."

    FMS, as we used to say, when I was working on Intel 4004's and 8008/8080's - it's the chip!

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    Post by Admin on Fri Jun 28, 2019 2:41 pm

    any normal SEO or ceo would have resigned by now as he must ultimately take responsibility Boeing??? no

    In actual fact the grounding is going to be much longer than they even now think because the worlds aviation authorities have lost confidence with the FAA due to their delay in not grounding the plane from the start. so now the faa has appointed an independent panel to ensure that the FAA is correctly dealing with the situation.

    The worlds aviation authorities are now conducting their own investigations etc not only into the faa's handling of events but are closely monitoring what Boeing is doing  before deciding if they will accept a new certificate of airworthiness. Some airlines are not going to use them until a suitable simulator is built incorporating the new mods.

    there are some that are saying the planes will not fly again this year which will mean boeing paying out billions in compensation, which could ultimately bring the company to its knees.
    edit
    it has now become apparent that the mcas was far more invasive than originally thought , so as you wrestled with the controls and forced the nose up, the mcas forced the nose down twice as hard , each time harder and harder

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