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Search: Posts Made By: rudderrudderrat
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Forum: Tech Log
15th Jun 2011, 14:16
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

FCOM 1.27.30 ALt LAW "In flight, the alternate...

FCOM 1.27.30 ALt LAW
"In flight, the alternate law pitch mode follows a load-factor demand law much as the normal law pitch mode does, but it has less built-in protection (reduced protections)."
...
Forum: Tech Log
14th Jun 2011, 07:36
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

Rudder trim

How then, would you trim out a tendency to roll, if you were in Alternate Law at FL350?
Forum: Tech Log
13th Jun 2011, 21:55
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

Originally Posted by DozyWannabe How do you...

Originally Posted by DozyWannabe

How do you cope with rudder trim?
Forum: Tech Log
13th Jun 2011, 16:37
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

Hi Svarin, Thanks for that link to the very...

Hi Svarin,

Thanks for that link to the very interesting document by Rechtsanwalt Prof. Dr. Ronald Schmid, Frankfurt am Main.


I agree with him completely. If Airbus FBW in ALT LAW doesn't...
Forum: Tech Log
13th Jun 2011, 08:56
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

Hi JD-EE, is correct - but it ignores the total...

Hi JD-EE,
is correct - but it ignores the total starting energy.

They were Initially flying at M.8 (about 480 kts TAS (Vi)) at FL 350 (h1).
Shortly Afterwards they were at FL 375 (h2) with a new...
Forum: Tech Log
11th Jun 2011, 08:52
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

Hi bubbers44, I think so. Maybe it is over...

Hi bubbers44,
I think so. Maybe it is over "confidence" in FBW to the exclusion of intelligent flying technique? e.g. the QRH Windshear procedure has two references to the use of "full backstick".
...
Forum: Tech Log
9th Jun 2011, 22:28
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

Hi etudiant, It's not self limiting. ...

Hi etudiant,

It's not self limiting.

"LATERAL CONTROL
When the aircraft flying in pitch alternate law, lateral control follows the roll direct law associated with yaw alternate or mechanical....
Forum: Tech Log
9th Jun 2011, 07:38
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

Hi NoD, On previous aircraft we had this...

Hi NoD,


On previous aircraft we had this logic:
The stall warning is inhibited on the ground AND with IAS less than 60 kts (to prevent false stall warnings during the take off roll).
If...
Forum: Tech Log
8th Jun 2011, 16:33
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

Hi NoD, If you had blocked pitots at FL...

Hi NoD,


If you had blocked pitots at FL 350 with IAS showing less than 60 kts - are you seriously telling me that you'd rather not have the stall warning system active?
Are you a pilot?
Forum: Tech Log
8th Jun 2011, 14:56
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

Hi NoD, If I'm airborne - I'd like the...

Hi NoD,


If I'm airborne - I'd like the warning to be available all the time please, especially with blocked up pitots showing Zero IAS.

not as hazardous as the warning being inhibited when...
Forum: Tech Log
8th Jun 2011, 14:23
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

Eee by gum Gums. That's so close - I can't spot...

Eee by gum Gums. That's so close - I can't spot the error.
Forum: Tech Log
8th Jun 2011, 14:05
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

Hi Ranger One, Sorry - I can't assure you of...

Hi Ranger One,

Sorry - I can't assure you of that despite trawling through FCOM. It seems ground/flight logic has not been included with the Stall Warning - just the 60kt switch.
Forum: Tech Log
8th Jun 2011, 09:20
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

Alternate with Manual Trim Law

Hi Golf-Sierra,



There may be lots of "very clever technical ways" of measuring airspeed. The aircraft has it's own natural way of flying a constant airspeed - simply don't change the power or...
Forum: Tech Log
6th Jun 2011, 12:46
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

Hi Mig15, I don't know why the crew...

Hi Mig15,



I don't know why the crew didn't lower the nose sufficiently when they first received the "stall stall" warning.

However, when the IAS fell below 60kts the stall warning ceased -...
Forum: Tech Log
4th Jun 2011, 10:44
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

Hi retiredF4, Thanks for the link to Stall...

Hi retiredF4,

Thanks for the link to Stall Procedures Airbus May 11.

It is interesting to note that there is now a reference to stab trim.

"2 b) Nose down pitch trim…….………………………………………..As...
Forum: Tech Log
3rd Jun 2011, 11:17
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

Hi FE Hoppy, "At 2 h 10 min 16, the...

Hi FE Hoppy,



"At 2 h 10 min 16, the PNF said "so, we’ve lost the speeds" then "alternate law ...
The airplane’s pitch attitude increased progressively beyond 10 degrees and the plane started...
Forum: Tech Log
3rd Jun 2011, 10:05
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

Hi BOAC, Normal Law is brilliant. It wraps...

Hi BOAC,

Normal Law is brilliant. It wraps the aircraft in cotton wool.

Direct Law is just like a Boeing and I could cope with that.

Alternate Law is something in between.

During...
Forum: Tech Log
3rd Jun 2011, 09:32
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

At 2.10.05 when the autopilot dropped out, due...

At 2.10.05 when the autopilot dropped out, due unreliable air speeds (showing about 60 kts), if the system had gone straight into Direct Law the aircraft would presumably have remained "speed stable"...
Forum: Tech Log
2nd Jun 2011, 20:59
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

@ engine-eer, I agree. In direct law I'd have a...

@ engine-eer, I agree. In direct law I'd have a conventional Boeing with natural speed stability - perfect.

@ dozywannabe. Alt Law in pitch = "In flight, the alternate law pitch mode follows a...
Forum: Tech Log
2nd Jun 2011, 19:09
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

Hi jcjeant, The only way I can imagine that...

Hi jcjeant,

The only way I can imagine that is if they "bunted over the top" so the wing loading was much less than 1g.
Forum: Tech Log
2nd Jun 2011, 16:52
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

Hi bearfoil Alternate Law. "LATERAL...

Hi bearfoil



Alternate Law.
"LATERAL CONTROL

When the aircraft flying in pitch alternate law, lateral control follows the roll direct law associated with yaw alternate or mechanical."

So...
Forum: Tech Log
2nd Jun 2011, 08:16
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

Hi Right Way Up, I agree. Also...

Hi Right Way Up,



I agree.

Also one wouldn't confuse the stall warning vibrations felt through the control column of a conventional aircraft with anything else. Under stressful conditions,...
Forum: Tech Log
30th May 2011, 14:02
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

Hi Minorite invisible, I have a copy of QRH...

Hi Minorite invisible,

I have a copy of QRH 2006 for A320 series and there is NO Stall Warning procedure. The closest is "Low Energy Warning" which basically says:

"The Speed Speed Speed...
Forum: Tech Log
30th May 2011, 08:28
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

Abnormal Attitude Law

Hi,

Once the aircraft was in Abnormal Attitude Law (with IAS less that 60 kts or angle of attack >30degs) can anybody point me to an FCOM reference which indicates that "Use Manual Pitch Trim"...
Forum: Tech Log
29th May 2011, 08:34
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

Abnormal Attitude Law

Hi Check Airman,

I tend to agree. In just 46 seconds (between 2h 10 min 05 and 2 h 10 min 51) the aircraft climbed with ROC up to 7,000 ft/min from 35,000ft to “37,500 ft and the recorded angle...
Forum: Tech Log
28th May 2011, 07:28
Replies: 2,070
Views: 613,023
Posted By rudderrudderrat

Hi All, If the pilots mistakenly believed...

Hi All,

If the pilots mistakenly believed they were in windshear conditions, it might explain why the pitch attitude was around 17.5 degs for most of the time, and why full back stick was used to...
Showing results 1 to 26 of 26


 
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