Skip to main content

Stalling Aircraft

Modern passenger planes cruise at very high altitude and very close to their stall speed, flying on a knife edge, in order to minimize fuel consumption.  The problem is that when a plane encounters turbulent air due to a storm or a side wind, it can stall unexpectedly, while still traveling at high speed.

It appears to me, that in the relentless pursuit of lower drag and lower fuel consumption, the designers have compromised aircraft stability and safety. 

The situation now, that a passenger plane can stall at 30,000 feet and then fall out of the sky, with the total loss of aircraft, crew and passengers, unable to recover despite the best efforts of an experienced flight crew, because the plane was designed to save every last drop of fuel, is inexcusable.

Aircraft designers should always put stability and safety first and should not be driven by marketing only.

Postscript
In October 2018, a brand new Boeing 737 Max crashed in Indonesia with great loss of life, because it had a new anti-stall feature that the pilots were not informed of.  The plane was forced down by the automatic system, due to a faulty AOA sensor and crashed into the sea, while the pilots were fighting the system for control - but the manual trim control wheel required super human strength to turn, as it was made smaller a few years prior in another unintentional bungle.

Maybe airlines should consider buying more conservatively designed Ukrainian and Russian planes, instead of badly engineered American ones.

Postmortemscript
This is not good at all.  Another 737 Max 8 went down in early March 2019, with very serious loss of life.

Of course, Boeing maintains that their planes are perfectly safe, while a writer at Tech Republic called the Max the world's first Self Highjacking Plane - for its propensity to deliberately fly itself into the ground.

Even Prez Trump weighed in that planes should be simpler and easier to fly.  I think plane designers should take note - not only Boeing, everyone.

The result is that Boeing has hundreds of planes, that nobody wants to fly in and every month they add another 42 coming off the production line (From the Douglas Adams Book of Bistro Management), so their employee parking lots are now filling up with the unloved planes and by the end of 2019 they will have to park another 300 new planes somewhere in the desert, while all the employees will have to bicycle to work since there would be nowhere to park their cars.



Airlines have the Max 8s stuffed at out of the way airports all over the world:
https://thepointsguy.com/news/heres-where-airlines-are-storing-the-boeing-737-max/

Boeing may go bankrupt because of the lost sales and law suits.

Just for future refrence, the 737-Max is now called 737-8 and 737-10 - maybe you want to check your boarding pass...


Herman

Comments

Popular posts from this blog

Parasitic Quadrifilar Helical Antenna

This article was reprinted in OSCAR News, March 2018:  http://www.amsat-uk.org If you want to receive Satellite Weather Pictures , then you need a decent antenna, otherwise you will receive more noise than picture. For polar orbit satellites, one needs an antenna with a mushroom shaped radiation pattern .  It needs to have strong gain towards the horizon where the satellites are distant, less gain upwards where they are close and as little as possible downwards, which would be wasted and a source of noise.  Most satellites are spin stabilized and therefore the antenna also needs circular polarization, otherwise the received signal will flutter as the antennas rotate through nulls. The helical antenna, first proposed by Kraus in 1948, is the natural solution to circular polarized satellite communications.  It is a simple twisted wire - there seems to be nothing to it.  Various papers have been published on helix antennas, so the operation is pretty well ...

Unlock CRA PDF Forms

Unlock Canada Revenue Agency PDF Forms It appears that there is a relatively new PDF feature to prevent casual copying and saving of a file and that some programs save PDF files with these foolish features active by default.  Many forms from the Canada Revenue Agency are locked in this way, which makes it difficult to do one's taxes, since one can fill the form, but cannot save it.  One can only print the form.  It should be possible to print to a file or export it to a new PDF file, but it is far better to reset the annoying anti-taxpayer flags, since the 'printed' form cannot be edited easily any more and I always manage to make a mistake or three that need to be corrected after review. If there is a Linux (virtual) machine handy, install qpdf and use it to reset the silly flags: $ su - password # dnf update # dnf install qpdf # exit $ qpdf --decrypt lockedfile.pdf unlockedfile.pdf One doesn't need a password to unlock these flags, so the fix is instant. La voila! He...

To C or not to C, That is the Question

As most would know, the Kernighan and Ritchie C Programming Language is an improved version of B, which is a simplified version of BCPL, which is derived from ALGOL, which is the Ur computer language that started the whole madness, when Adam needed an operating system for his Abacus, to count Eve's apples in the garden of Eden in Iraq.  The result is that C is my favourite, most hated computer language , which I use for everything. At university, I learned FORTRAN with punch cards on a Sperry-Univac, in order to run SPICE, to simulate an operational amplifier.  Computers rapidly lost their glamour after that era! Nobody taught me C.  I bought the book and figured it out myself. Over time, I wrote a couple of assemblers, a linker-locator, various low level debuggers and schedulers and I even fixed a bug in a C compiler - not because I wanted to, but because I had to, to get the job done!   Much of my software work was down in the weeds with DSP and radio modems...