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Search: Posts Made By: bobcat4
Showing results 1 to 35 of 46
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Forum: Rumours & News
29th Mar 2014, 18:31
Replies: 11,831
Views: 24,200,431
Posted By bobcat4

Speed of Sound wrote: I found out that...

Speed of Sound wrote:



I found out that the main reason is the size of the beacon. I'm not sure about the power consumption.

According to...
Forum: Rumours & News
29th Mar 2014, 08:51
Replies: 11,831
Views: 24,200,431
Posted By bobcat4

Mesoman wrote: Why use 37kHz when lower...

Mesoman wrote:


Why use 37kHz when lower frequencies travel longer in water? I'm just curious.
Forum: Questions
26th Jul 2013, 07:55
Replies: 60
Views: 22,639
Posted By bobcat4

Helios Airways Flight 522...

Helios Airways Flight 522 (http://en.wikipedia.org/wiki/Helios_Airways_Flight_522)
Forum: Rumours & News
21st Jul 2013, 17:04
Replies: 2,403
Views: 2,196,386
Posted By bobcat4

They (NTSB) said it was “armed”. I guess it was...

They (NTSB) said it was “armed”. I guess it was in "hold" as it didn't wake up and that the crew didn't notice (both A/T hold and the speed decay).

Even if they were not stable on final, they...
Forum: Rumours & News
19th Jul 2013, 20:24
Replies: 2,403
Views: 2,196,386
Posted By bobcat4

A Squared wrote: How can you pass 5...

A Squared wrote:



How can you pass 5 mile and be fully configured when you’re instructed to be at 180 knots to 5 miles?

And... Is that 5 from threshold or 5 from DME? In SFO that's a pretty...
Forum: ATC Issues
18th Jul 2013, 08:40
Replies: 26
Views: 5,868
Posted By bobcat4

Gonzo wrote: Yes, that’s also known as...

Gonzo wrote:



Yes, that’s also known as TDME (Terminal DME) and is co-located with the ILS. I know how DME works, and that it is often (always?) related to VOR or ILS.

Asiana 214 was...
Forum: ATC Issues
17th Jul 2013, 20:25
Replies: 26
Views: 5,868
Posted By bobcat4

180 to 5

First: I do not blame ATC for the accident. Just to be clear.

Question: “180 to 5” is a well known procedure (or “demand”) by ATC world wide. I do expect that to be 180 to 5 (nautical) miles from...
Forum: Rumours & News
16th Jul 2013, 14:00
Replies: 2,403
Views: 2,196,386
Posted By bobcat4

BOAC wrote: The only thing that might...

BOAC wrote:



The only thing that might be unusual is that “180 to 5” means “180 to 5, but if you want to slow down at 7, that’s fine”. That is, unusual to Korean pilots who might be...
Forum: Rumours & News
16th Jul 2013, 12:52
Replies: 2,403
Views: 2,196,386
Posted By bobcat4

nitpicker330, do you say ATC put them unstable? ...

nitpicker330, do you say ATC put them unstable?

I also wonder why ATC want to rush approaches (and possibly make them unstable) when it can lead to a go-around which adds another aircraft to the...
Forum: Rumours & News
16th Jul 2013, 10:24
Replies: 2,403
Views: 2,196,386
Posted By bobcat4

The landing checklist was not completed until 500 feet

If SOP in VMC says ”stable at 500 ft”, and assuming ”stable” includes ”landing checklist complete”, that seems a bit on the edge of being stable. Although we know they weren’t stable, they obviously...
Forum: Rumours & News
13th Jul 2013, 07:49
Replies: 2,403
Views: 2,196,386
Posted By bobcat4

RunSick Yes of course, but now we’re...

RunSick



Yes of course, but now we’re back on the track discussing new sophisticated navigation systems vs. having a pilot flying the jet. As a software engineer, a professional developer, I...
Forum: Rumours & News
12th Jul 2013, 06:38
Replies: 2,403
Views: 2,196,386
Posted By bobcat4

Knot Apilot wrote: Well… We’re talking...

Knot Apilot wrote:



Well… We’re talking about A/T in Flight Level Change (FLCH), right? I imagine an approach and landing is not a flight level change (although technically it is; a flight...
Forum: Rumours & News
12th Jul 2013, 03:26
Replies: 2,403
Views: 2,196,386
Posted By bobcat4

Centaurus wrote: If the sophisticated...

Centaurus wrote:


If the sophisticated computer systems will do their best not allow the pilot to crash, why disable (by design) the A/T wake-up in FLCH-mode? Or to rephrase the question: In what...
Forum: Tech Log
23rd May 2011, 17:12
Replies: 3,435
Views: 1,668,418
Posted By bobcat4

Flying at night, at cruise altitiude, over the...

Flying at night, at cruise altitiude, over the ocean, no visual refs... In the middle of some nasty weather... Airspeed indicating overspeed. Who would pitch down an aircraft under these...
Forum: Tech Log
19th Mar 2009, 21:25
Replies: 44
Views: 29,101
Posted By bobcat4

NSEU Wow! I thought it was in the sim....

NSEU



Wow! I thought it was in the sim. :)

Well, that would make my question very silly... :ouch:
Forum: Tech Log
18th Mar 2009, 18:04
Replies: 44
Views: 29,101
Posted By bobcat4

Good info, 737AvEng! I suppose you're an...

Good info, 737AvEng!

I suppose you're an engineer, not a pilot. Were you (or any pilot nearby) able to recover for a stall at 500' with all that back trim? Yes, I know SOP implies trimming as part...
Forum: Rumours & News
13th Mar 2009, 22:19
Replies: 2,906
Views: 1,448,122
Posted By bobcat4

wiggy: Yes, in a way it was. But it...

wiggy:



Yes, in a way it was. But it was a very strange accident. They closed (and reversed) the left engine, but left the other one with climb power.

It wasn't a A/T auto-retard failure as...
Forum: Rumours & News
13th Mar 2009, 21:32
Replies: 2,906
Views: 1,448,122
Posted By bobcat4

Here we go again... :) Pardon me for not taking...

Here we go again... :) Pardon me for not taking any side. In one post I agree with you, in the next I go like this:

MU3001A wrote:



Well, first you have to be 100% sure that the output...
Forum: Rumours & News
13th Mar 2009, 19:13
Replies: 2,906
Views: 1,448,122
Posted By bobcat4

MU3001A As Rainboe said: ...

MU3001A



As Rainboe said:

[automation]...that has worked fine for all the world for 25 years.........except for 1 flight.


Of course it is almost impossible to speak about "acceptable...
Forum: Rumours & News
13th Mar 2009, 17:26
Replies: 2,906
Views: 1,448,122
Posted By bobcat4

lomapaseo Yes, I agree. We should not...

lomapaseo



Yes, I agree. We should not rule out technical flaws, but to fix them is far easier said that done. I have to admit I tried (as a layman) and jumped to this conclusion: "If...
Forum: Rumours & News
13th Mar 2009, 11:59
Replies: 2,906
Views: 1,448,122
Posted By bobcat4

Nigd3, :) Right! See you point. Still...

Nigd3,



:) Right! See you point. Still I doubt Rolls-Royce isn't in the same perfect shape as some thinks Boeing is... "Don't you think Rolls-Royce know how to make engines?", I can hear...
Forum: Rumours & News
13th Mar 2009, 10:15
Replies: 2,906
Views: 1,448,122
Posted By bobcat4

Rainboe wrote: Nigd3 wrote: ...

Rainboe wrote:



Nigd3 wrote:



History has proven Boeing (and others) makes mistakes like bad design. I can reel off many examples. The newest one:
Forum: Rumours & News
11th Mar 2009, 06:03
Replies: 2,906
Views: 1,448,122
Posted By bobcat4

GlueBall: I know. I was just answering...

GlueBall:



I know. I was just answering Rainboes comment "Controllers do not fly or tell the pilot how to fly". Well, they does... Sometimes... When a MSAW alerts goes off. Wouldn't surprise...
Forum: Rumours & News
10th Mar 2009, 09:29
Replies: 2,906
Views: 1,448,122
Posted By bobcat4

Rainboe: Simple question: Why do we...

Rainboe:



Simple question: Why do we have MSAW?

Ah Sorry! Of course, you have no idea what MSAW is! It's NOT the controllers job to fly the aircraft. Hence, MSAW is unknown to you, or...
Forum: Tech Log
9th Mar 2009, 10:40
Replies: 20
Views: 8,047
Posted By bobcat4

TinyTim2 wrote: Right! Take a look at...

TinyTim2 wrote:



Right! Take a look at the Space Shuttle. Its avionic computer is a 32-bits IBM Model AP-101. Five actually. Redundancy is important to NASA.

I have not been able to find...
Forum: Tech Log
9th Mar 2009, 10:24
Replies: 20
Views: 8,047
Posted By bobcat4

VinRouge: As far as there anything...

VinRouge:



As far as there anything like an OS, I would put my money on VxWorks. NASA used (are using it now?) it on Mars. Very reliable. I think both Boeing and Airbus have VxWorks running in...
Forum: Rumours & News
8th Mar 2009, 21:00
Replies: 2,906
Views: 1,448,122
Posted By bobcat4

jackharr: I see. Well, As far as I...

jackharr:



I see. Well, As far as I know the engines are not mounted in such way that they provide thrust that does not go through the center of mass. That means the thrust from the engines...
Forum: Rumours & News
8th Mar 2009, 18:07
Replies: 2,906
Views: 1,448,122
Posted By bobcat4

jackharr wrote: As a non professional...

jackharr wrote:


As a non professional pilot, even I know that max power cannot be used at all stages of flight. The fist thing I thought of was an emergency descent after pressurization failure....
Forum: Rumours & News
8th Mar 2009, 17:37
Replies: 2,906
Views: 1,448,122
Posted By bobcat4

Rainboe wrote: You're right of course....

Rainboe wrote:



You're right of course. But one thing strikes me as "weird". If A/T is on power idle, the pilot pushes the throttle levers to full power, and A/T then goes to power idle, then...
Forum: Rumours & News
8th Mar 2009, 09:14
Replies: 2,906
Views: 1,448,122
Posted By bobcat4

Stall recover when fully back-trimed

I'm still curious about Safta's findings. Is it really non-recoverable when fully back-trimed? Anyone tried this in the sim (737NG)? Or even the poor mans sim like FSX (oh, now I risking my life...
Forum: Rumours & News
7th Mar 2009, 15:15
Replies: 2,906
Views: 1,448,122
Posted By bobcat4

GlueBall: Ok, I see... You're referring...

GlueBall:


Ok, I see... You're referring to TAM Airlines Flight 3054 (PR-MBK) landing at Congonhas I guess. A strange accident. They did close throttle on one engine, but the other one was left...
Forum: Rumours & News
7th Mar 2009, 14:00
Replies: 2,906
Views: 1,448,122
Posted By bobcat4

ant1: Forgot to retard manually?...

ant1:



Forgot to retard manually? Hmm... Is that really possible? Ok, I guess it is. Forgetting gear down is also possible. Anyway, it should not be a big deal. Forgetting to retard manually...
Forum: Rumours & News
7th Mar 2009, 11:46
Replies: 2,906
Views: 1,448,122
Posted By bobcat4

BOAC, One can always argue that a CoG...

BOAC,



One can always argue that a CoG set way outside (forward) the envelope will not be dangerous because it's possible to back-trim the way it is on this aircraft. When just considering trim...
Forum: Rumours & News
7th Mar 2009, 10:20
Replies: 2,906
Views: 1,448,122
Posted By bobcat4

deltayankee wrote: Although I...

deltayankee wrote:



Although I initially agreed to this I now have to drop it. Remember James Bond in GoldenEye from 1995? It opens with Bond breaking into a chemical weapons plant, then...
Forum: Rumours & News
7th Mar 2009, 10:08
Replies: 2,906
Views: 1,448,122
Posted By bobcat4

BOAC wrote: Thanks. :) I do not agree...

BOAC wrote:



Thanks. :) I do not agree with the other software engineers saying it is just a matter of some extra lines of code. I would rather remove some lines of code.



Right!...
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