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Search: Posts Made By: clearedtocross
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25th Feb 2020, 10:34
Replies: 72
Views: 45,458
Posted By clearedtocross

I am sorry to disagree. A production process or...

I am sorry to disagree. A production process or maintenance procedure that does not care to remove FOD is not safe, regardless of the type of FOD. I once nearly got killed because some guy left a...
24th Feb 2020, 13:52
Replies: 72
Views: 45,458
Posted By clearedtocross

According to CNBC 2/3 of undelivered MAX carry...

According to CNBC 2/3 of undelivered MAX carry FOD in the fuel tanks. https://www.cnbc.com/2020/02/21/boeing-to-expand-737-max-inspections-sources-say.html. Pretty grim!
And why should all those MAX...
Forum: Tech Log
22nd Jan 2020, 08:42
Replies: 60
Views: 20,477
Posted By clearedtocross

Now the poor software guys working on the max get...

Now the poor software guys working on the max get more time. The first move of B's new management in the right direction to get the max flying again. I hope they clear up some other issues as well...
Forum: Tech Log
21st Jan 2020, 13:25
Replies: 60
Views: 20,477
Posted By clearedtocross

Ok, rubbish if you like. But nobody suggested the...

Ok, rubbish if you like. But nobody suggested the FCC should be written on a 286 in C in 2020. That would be truly insane. It's questionable if the FCC should have been developped from scratch on a...
Forum: Tech Log
21st Jan 2020, 08:26
Replies: 60
Views: 20,477
Posted By clearedtocross

I guess the answer to this question is easy:...

I guess the answer to this question is easy: there was no final version and there still is none. Of course, there was a lot of testing going on, even many flight tests, but they possibly failed to...
Forum: Tech Log
20th Jan 2020, 18:06
Replies: 60
Views: 20,477
Posted By clearedtocross

For those who were trained to fly rather than to...

For those who were trained to fly rather than to write real time software just a little example that shows the problem:
Imagine a single track railway connects two very remote stations A and B where...
Forum: Tech Log
20th Jan 2020, 12:42
Replies: 60
Views: 20,477
Posted By clearedtocross

The problem with interactive computer systems...

The problem with interactive computer systems with both synchronous and async interactions is that any amount of testing does not make sure they always work. You have to get it right by design, not...
Forum: Rotorheads
2nd Jan 2020, 09:03
Replies: 54
Views: 9,164
Posted By clearedtocross

The earlier R44 (Raven I) are all carburated,...

The earlier R44 (Raven I) are all carburated, only the Raven II have fuel injections. Problem with the carburated ones is that the governor compensates carb ice until the throttle is fully open with...
24th Dec 2019, 12:23
Replies: 288
Views: 321,168
Posted By clearedtocross

Nicely explained, MechEngr, but that's the trim...

Nicely explained, MechEngr, but that's the trim stability of a glider... Now add two large bonks with thrust/drag not vectored through cg and in line of flight, and you get another big factor...
22nd Dec 2019, 09:16
Replies: 288
Views: 321,168
Posted By clearedtocross

Fully agree, SLF3. And I guess thats also why FAA...

Fully agree, SLF3. And I guess thats also why FAA did not comply with the request to forward the re-certification documents: because they have nothing that comes even close to it.
21st Dec 2019, 13:52
Replies: 288
Views: 321,168
Posted By clearedtocross

The fact that B keeps the non-MCAS (raw) ...

The fact that B keeps the non-MCAS (raw) pitch-up characteristics a secret leads to the conclusion that those characteristics are much worse than just a mild non-linearity. That is probably also...
16th Dec 2019, 14:55
Replies: 4,656
Views: 4,248,201
Posted By clearedtocross

more about posible shutdown 737 Max production...

more about posible shutdown 737 Max production here: https://simpleflying.com/boeing-737-production-shutdown/
16th Dec 2019, 14:49
Replies: 4,656
Views: 4,248,201
Posted By clearedtocross

From WSJ just now: Boeing Co. is considering...

From WSJ just now:
Boeing Co. is considering either suspending or cutting back production of the 737 MAX amid growing uncertainty over the troubled plane’s return to service and could disclose a...
6th Dec 2019, 14:43
Replies: 4,656
Views: 4,248,201
Posted By clearedtocross

There is another strong reason why B tries to...

There is another strong reason why B tries to coax the FAA to lift the grounding before the end of the year. Looking at their public 3rd quarter financial statement, they obviously booked all the...
27th Nov 2019, 15:07
Replies: 170
Views: 200,277
Posted By clearedtocross

Here is the evidence! ...

Here is the evidence!
https://simpleflying.com/boeings-777x-ripped-apart/
24th Nov 2019, 08:02
Replies: 4,656
Views: 4,248,201
Posted By clearedtocross

This is only true for a system that is basically...

This is only true for a system that is basically stable and where a linear input produces a proportional linear output. Controllers for systems which have less or no inherent stability are highly...
9th Nov 2019, 15:57
Replies: 4,656
Views: 4,248,201
Posted By clearedtocross

Stall identification is a misleading term. It’s...

Stall identification is a misleading term. It’s task is NOT to identify a stall situation to the pilots - like a stall horn or stick shaker - but to identify an approaching stall condition with its...
9th Nov 2019, 13:28
Replies: 4,656
Views: 4,248,201
Posted By clearedtocross

Easy enough. Alice fell into a land where Humpty...

Easy enough. Alice fell into a land where Humpty Trumpty resides.
9th Nov 2019, 10:13
Replies: 4,656
Views: 4,248,201
Posted By clearedtocross

This may be true for normal pax insurance for a...

This may be true for normal pax insurance for a „normal“ aircraft. But how about product liability? The FAA will not cough up a single dime for a now known design deficiency by B, neither for the...
9th Nov 2019, 07:23
Replies: 4,656
Views: 4,248,201
Posted By clearedtocross

I wonder how much longer the insurance companies...

I wonder how much longer the insurance companies will wait to revoke their contracts regarding Max, NG (pickle forks) and Dreamliner so obviously not meeting safety standards.
25th Oct 2019, 12:00
Replies: 357
Views: 475,085
Posted By clearedtocross

9 out of 42 at Korean Air and others airlines in...

9 out of 42 at Korean Air and others airlines in South Korea 737NG's grounded!
https://simpleflying.com/south-korea-grounds-9-boeing-737s/
18th Oct 2019, 16:18
Replies: 4,656
Views: 4,248,201
Posted By clearedtocross

The CNN article insinuates that a few simulator...

The CNN article insinuates that a few simulator flights by invited pilots and single test flight by the FAA will get the Max back into the air. CNN does not mention that while these activities may be...
4th Oct 2019, 12:45
Replies: 357
Views: 475,085
Posted By clearedtocross

The AD that calls for repetitive inspections on a...

The AD that calls for repetitive inspections on a large lot of 737 is out and can be read here...
11th Sep 2019, 19:22
Replies: 4,656
Views: 4,248,201
Posted By clearedtocross

Thanks for the enlightenment, I was not aware...

Thanks for the enlightenment, I was not aware that aerodynamics laws change so much within 10 years. I thought that pitch stability or the lack thereof was an issue even for the Wright brothers. And...
11th Sep 2019, 17:29
Replies: 4,656
Views: 4,248,201
Posted By clearedtocross

Interesting explanation of pitch up problem for...

Interesting explanation of pitch up problem for all those not familiar with swept wing aerodynamics - like me.

https://en.wikipedia.org/wiki/Pitch-up

MCAS seems to be a mitigation ala Fred...
Showing results 1 to 25 of 90
 


 
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