VBprogrammer

95 ms·

1921.
by VBprogrammer 7y ago
Type ratings don't really work like that. 90% of the type rating is systems knowledge, emergency procedures etc. If a new type rating was needed there would be a conversion course from the existing type rating.
1922.
by VBprogrammer 7y ago
Unflyable or unstable isn't nearly the same thing as uncertifiable. People have flown a whole lot of time in uncertifiable aircraft (see the whole experimental aircraft sector) but transport category aircraft are supposed to exhibit as
1923.
by VBprogrammer 7y ago
> you add tools to manage tools to manage other tools and so on. Each new layer reinforces the job security of people working on the previous one. The first time I seen a job title of "Kubernetes Keeper" I died a little inside.
1924.
by VBprogrammer 7y ago
I don't like downvoting people but in this case your comment adds literally nothing to the conversation. While I can wholeheartedly agree that golang has features, and in some cases absence of features, which make it less than ideal fo
1925.
by VBprogrammer 7y ago
To be fair; non-functional requirements as a separate entity are pretty much wank. If you need a line in a document to tell you that exposing privileged information to the outside world is a bad idea, or that you should make sure the soluti
1926.
by VBprogrammer 7y ago
That change may not be worth the cost, or even just the opertunity cost, of doing it. Someone presumably thought it was a good idea to make the change and assumed it would take only a few minutes work. I think the senario is that they are
1927.
by VBprogrammer 7y ago
Don't quote me on this but from memory a tree is able to sequester a lot more in the first couple of years than as a fully grown tree. Intuitively that makes sense.
1928.
by VBprogrammer 7y ago
Not really. Twin engine aircraft don't have to meet the same crash worthiness standards and usually have higher stall speeds (in this case minimum crash speeds). To be fair the statistics are swayed slightly by a number of factors, tra
1929.
by VBprogrammer 7y ago
Ha. That sounds like my last job except s/2 days/3 hours/.
1930.
by VBprogrammer 7y ago
For most of B.C wood-gasification would be a great solution! https://en.m.wikipedia.org/wiki/Wood_gas
1931.
by VBprogrammer 7y ago
I'm from the UK so the steering wheel 'belongs' on the right hand side. However, I've driven thousands of miles across Europe and Canada. The only time I ever struggled with driving on the other side (other than the occa
1932.
by VBprogrammer 7y ago
By normal I mean below its threshold for activation. According to Boeing this depends on speed and attitude. Of course this leaves the problem of what happens if the sensor data was wrong but fluctuating wildly. Which is what I was getting
1933.
by VBprogrammer 7y ago
> Every single piece of reporting I've seen on the matter refers to MCAS as an anti-stall device. Assuming you are a developer, have you ever seen some reporting of something technical in the news? Does it not make you cringe? >
1934.
by VBprogrammer 7y ago
It's generally difficult to test these sensors before takeoff, it's basically a little blade or wing which measures the relative wind over the aircraft. Without forward speed it has nothing to measure.
1935.
by VBprogrammer 7y ago
> You and other keeps parroting this line, I don't believe it to be true. You are free to believe anything you want to believe. Of course if you where involved in the 737 Max development and you have inside information to the contra
1936.
by VBprogrammer 7y ago
Not me. Humble student pilot and aviation enthusiast. Not sure if you caught this post https://philip.greenspun.com/blog/2019/04/08/boeing-737-max-... which I think is basically the same idea as you are
1937.
by VBprogrammer 7y ago
If a pilot goes anywhere near a stall on a normal commercial flight then they have fucked something up. MCAS is only required to maintain a positive slope to AoA - stick force curve. MCAS resulted in 2 crashes because the implementation was
1938.
by VBprogrammer 7y ago
AoA sensors are sensitive to very minor deviations in the surface they are mounted to, there are aircraft which don't allow any minor damage in that area because it can cause misreadings.
1939.
by VBprogrammer 7y ago
The other part of Boeings fix is to prevent MCAS from being reactivated repeatedly. If I remember correctly they are not allowing it to reactivate until the AoA returns to normal. I'm hopeful that they have analysed what happens if the
1940.
by VBprogrammer 7y ago
The speculation on the Ethiopian flight was a bird strike. The data was normal until a few seconds after take off. Another issue could be the failure mode, if it failed at or near 0 AoA it wouldn't cause too many safety of flight issue
1941.
by VBprogrammer 7y ago
Or maybe they forgot to add the flying unicorns to power it. I'm not sure why you think boeing would lie about it. Or how they'd convince the regulators in two different countries to cover it up since you can see the behaviour by
1942.
by VBprogrammer 7y ago
Sigh. I've reviewed almost everything written about the accidents including the information supplied by Boeing to the airlines to explain the function of the MCAS system. There is no lower limit on the complexity of a system required t
1943.
by VBprogrammer 7y ago
Maybe 25 degrees is a little bit close to a real value. But think of this / flying along this line of text. That is what the AoA sensor was telling the FCC was happening to the aircraft. That's wildly out of range.
1944.
by VBprogrammer 7y ago
He part owns a Pilatus PC-12, which is pretty much a single engine regional jet. It isn't your grandfather's Cessna.
1945.
by VBprogrammer 7y ago
I think it's fair to say that his knowledge of aircraft plus his knowledge of software and electrical engineering qualify him to speculate. Its quite likely he has greater knowledge of both subjects than the person who physically imple
1946.
by VBprogrammer 7y ago
That's not nearly the case. MCAS is a stupidly simple system intended to cut in during very unusual phases of flight were a normal commercial flight would not be operating.
1947.
Boeing 737 MAX crash and the rejection of ridiculous data(philip.greenspun.com)
160 points by VBprogrammer 7y ago|185 comments
1948.
by VBprogrammer 7y ago
I once wondered why aircraft don't have electric motors (either battery or APU powered) to move them to the holding point at which point the fire up the engines. Turns out Airbus has a patent on it, it's not yet being used due to
1949.
by VBprogrammer 7y ago
Requesting additional track miles could be because the aircraft wasn't yet configured for landing, perhaps because ATC held the aircraft high due to traffic, or because the pilots didn't manage the decent well. There are also maxi
1950.
by VBprogrammer 7y ago
To be clear, I think MCAS was a massive engineering failure for Boeing, I'm just pointing out why I think they didn't automatically say "hey, we've got two sensors, lets compare the readings before we act on it". Ho

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