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Search: Posts Made By: Chris Scott
Showing results 1 to 35 of 92
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Forum: Tech Log
23rd Mar 2014, 23:07
Replies: 813
Views: 153,888
Posted By Chris Scott

Quote from Dozy Wannabe: "[...] the difference...

Quote from Dozy Wannabe:
"[...] the difference between pulling the SS back in HAP mode versus pitch normal is that there is no phugoid-damping in pitch normal, thus less potential impediment to the...
Forum: Tech Log
22nd Mar 2014, 12:07
Replies: 813
Views: 153,888
Posted By Chris Scott

Quote from Dozy Wannabe: " - perhaps I should...

Quote from Dozy Wannabe:
" - perhaps I should have qualified the statement as "*ended up* too slow". I've certainly never argued that the aircraft wasn't fast and high on the approach initially!"
...
Forum: Tech Log
22nd Mar 2014, 01:18
Replies: 813
Views: 153,888
Posted By Chris Scott

Quote from gums: The guy screwed up... As...

Quote from gums:
The guy screwed up...

As a general observation, I think even the A320's strongest critics in this discussion have never disagreed that no flypast should be conducted with...
Forum: Tech Log
21st Mar 2014, 00:19
Replies: 813
Views: 153,888
Posted By Chris Scott

Quote from CONF_iture: "During high AoA demo...

Quote from CONF_iture:
"During high AoA demo where full back stick has to be maintained the FCS is constantly working at maintaining alpha max, therefore the FCS will not use a thrust increase or...
Forum: Tech Log
19th Mar 2014, 17:24
Replies: 813
Views: 153,888
Posted By Chris Scott

Quote from CONF_iture: "[...] Alpha max is an...

Quote from CONF_iture:
"[...] Alpha max is an AoA that the FCS maintains at the fixed value Airbus decided to adopt depending on the configuration.
The corresponding speed to that fixed alpha max...
Forum: Tech Log
19th Mar 2014, 15:45
Replies: 813
Views: 153,888
Posted By Chris Scott

Hello gums, If you were asking about ops in...

Hello gums,

If you were asking about ops in the normal range of AoAs, the answer is yes on most current transports.

With the A/THR off, but the AFS in speed mode, the AFS controls speed with...
Forum: Tech Log
18th Mar 2014, 15:30
Replies: 813
Views: 153,888
Posted By Chris Scott

Windshear in the lee of the trees?

Quote from HN39, in reply to CONF_iture:
"I'm disappointed that you still don't seem to grasp a point I made more than once (see f.e. my post #520 on page 26)
When flying at alphamax, thrust...
Forum: Tech Log
17th Mar 2014, 20:12
Replies: 813
Views: 153,888
Posted By Chris Scott

Quotes from roulishollandais: "I know all that...

Quotes from roulishollandais:
"I know all that Chris Scott ! I am able to do substractions..."

Forgive me... But your posts are usually so cryptic that it is sometimes difficult for a simple...
Forum: Tech Log
16th Mar 2014, 19:45
Replies: 813
Views: 153,888
Posted By Chris Scott

Quote from roullishollandais: What is still...

Quote from roullishollandais:
What is still unknown is the altitude read on the altimeter on the cockpit

That is correct, strictly speaking, for two reasons:
(1) there is no video of the...
Forum: Tech Log
14th Mar 2014, 17:44
Replies: 813
Views: 153,888
Posted By Chris Scott

Bon soir roulis, The Journal Officiel is...

Bon soir roulis,

The Journal Officiel is the document, available via the BEA website, which Confit shows.

http://www.bea.aero/docspa/1988/f-kc880626/pdf/f-kc880626.pdf

Can you explain...
Forum: Tech Log
14th Mar 2014, 09:54
Replies: 813
Views: 153,888
Posted By Chris Scott

BEA Rapport Final

Quote from noske:
"Well, that's the risk you take with an unofficial publication. That document was probably derived from the BEA PDF, and transcribing those DFDR printouts must have been...
Forum: Tech Log
13th Mar 2014, 11:42
Replies: 813
Views: 153,888
Posted By Chris Scott

Confit, I think you are wrong to argue that...

Confit,

I think you are wrong to argue that the wind was calm, if only for the reasons HN39 has pointed out.

Also, if you look again at the Andre Karsenty video, you will see a large balloon...
Forum: Tech Log
13th Mar 2014, 10:38
Replies: 813
Views: 153,888
Posted By Chris Scott

Documentation discrepancy of Rad Alt datum at TGEN 334

Hello Confit,

I think many of us were already aware of the discrepancy between the figure of 34 ft in 1.11.4 of the BEA "Rapport Final", and the 24 ft shown in the DFDR "Tome 1" table of the same...
Forum: Tech Log
10th Mar 2014, 00:27
Replies: 813
Views: 153,888
Posted By Chris Scott

Thanks roulis, My main purpose was to...

Thanks roulis,

My main purpose was to explain to anyone interested in these matters that - at the time Capt Asseline was doing his conversion course - the A320 sim was unreliable, and that...
Forum: Tech Log
8th Mar 2014, 15:29
Replies: 813
Views: 153,888
Posted By Chris Scott

roulis! More of a history reference, after...

roulis!

More of a history reference, after 26 years! Sorry, I should have explained better, so today I have been looking at the Aeroformation course information, the schedule (with many...
Forum: Tech Log
7th Mar 2014, 15:54
Replies: 813
Views: 153,888
Posted By Chris Scott

That's true today, but not on the A320 at Blagnac...

That's true today, but not on the A320 at Blagnac in February/March 1988. The Thomson-CSF flight simulator was very unreliable, and certainly not approved for zero-flight-time type-ratings!...
Forum: Tech Log
6th Mar 2014, 23:56
Replies: 813
Views: 153,888
Posted By Chris Scott

Quote: "@HN39 - Understood, and it wasn't a...

Quote:
"@HN39 - Understood, and it wasn't a criticism, I just wanted to make sure that as the thread meanders to its late stages we got as many of our facts in a row as we can."

IMO, that has to...
Forum: Tech Log
24th Feb 2014, 19:51
Replies: 813
Views: 153,888
Posted By Chris Scott

Briefing of Co-pilot

Bon soir roulis,

Because my French is faible, I still have not finished Mr Asseline's book!

1) I also see nothing in the captain's briefing to stipulate (sorry!) which instrument would be...
Forum: Tech Log
23rd Feb 2014, 19:22
Replies: 813
Views: 153,888
Posted By Chris Scott

Hello OG, Yes: more or less. At a pitch...

Hello OG,

Yes: more or less. At a pitch attitude of +13.5 deg on T/O (main L/G oleos compressed), most of the length of the tapering part of the rear fuselage scrapes along the runway, and the RA...
Forum: Tech Log
23rd Feb 2014, 16:20
Replies: 813
Views: 153,888
Posted By Chris Scott

Quote from Owain Glyndwr (my emphasis): "Let us...

Quote from Owain Glyndwr (my emphasis):
"Let us remember that the RA height over the last few seconds was 30 ft, the lowest point on the airframe would have been less than that because of the...
Forum: Tech Log
20th Feb 2014, 10:37
Replies: 813
Views: 153,888
Posted By Chris Scott

Quote from OK465: "The first obvious change in...

Quote from OK465:
"The first obvious change in Valphamax occurs when your wrist gets sore and push forward on the SS resulting in Valphamax noticeably decreasing as the aircraft is unloaded....
Forum: Tech Log
19th Feb 2014, 17:24
Replies: 813
Views: 153,888
Posted By Chris Scott

Hi OK465, Thanks for your detailed, hands-on...

Hi OK465,
Thanks for your detailed, hands-on sim reports. Just to pick up on one:

"The jam engine accels or decels seem to cause the largest AOA variations (both below and above depending) from...
Forum: Tech Log
19th Feb 2014, 00:17
Replies: 813
Views: 153,888
Posted By Chris Scott

Quotes from CONF_iture: "It is not exactly...

Quotes from CONF_iture:

"It is not exactly clear why you guys need to introduce notions of "flare maneuver" ..."

Simply because it takes a force to change the trajectory of any vehicle - in...
Forum: Tech Log
18th Feb 2014, 13:05
Replies: 813
Views: 153,888
Posted By Chris Scott

HN39, Thanks for grasping the nettle and...

HN39,
Thanks for grasping the nettle and reminding me and others that the designers have to make provisions for the complications of phugoid oscillations, as confirmed by the Airbus input to the...
Forum: Tech Log
17th Feb 2014, 11:03
Replies: 813
Views: 153,888
Posted By Chris Scott

Quotes from CONF_iture: "If you increase...

Quotes from CONF_iture:

"If you increase speed, you're not at alpha max any more."

That's only true if you maintain the same Nz. If you need to flare, you have to increase Nz (load factor) ...
Forum: Tech Log
16th Feb 2014, 23:34
Replies: 813
Views: 153,888
Posted By Chris Scott

Quotes from OK465: "Having the SS full aft...

Quotes from OK465:

"Having the SS full aft doesn't necessarily equate to full ANU elevator or any specific elevator position at all."

I don't recall anyone arguing here that it does.
...
Forum: Tech Log
16th Feb 2014, 17:34
Replies: 813
Views: 153,888
Posted By Chris Scott

gums, To repeat myself, the tricky scenario...

gums,

To repeat myself, the tricky scenario HN39 and I were discussing was not the go-around, but the planned fly-past at an AoA of alpha-max, using manual thrust to maintain height by keeping...
Forum: Tech Log
14th Feb 2014, 21:12
Replies: 813
Views: 153,888
Posted By Chris Scott

Hello gums, "The potential rate of climb is a...

Hello gums,
"The potential rate of climb is a simple function of power available versus power required for your configuration."

Agreed! I was addressing the problems of flying level and VERY...
Forum: Tech Log
14th Feb 2014, 10:17
Replies: 813
Views: 153,888
Posted By Chris Scott

Flight on an energy knife-edge

Quote from Dozy Wannabe (my emphasis):
"Theoretically speaking, at 100ft over a flat landscape and with the power set correctly the A320 would be capable of safely maintaining Alpha Max indefinitely...
Forum: Tech Log
12th Feb 2014, 18:58
Replies: 813
Views: 153,888
Posted By Chris Scott

Effects of Flare Mode

Hi HN39,

Thanks for recapping the information from the post-1988 FCTM.

My English-language FCOM from 1988 is in agreement that the first stage of what it calls Landing Mode involves two...
Forum: Tech Log
11th Feb 2014, 15:48
Replies: 813
Views: 153,888
Posted By Chris Scott

Dozy, Are you arguing that he levelled off...

Dozy,

Are you arguing that he levelled off 40 ft lower than he intended, despite that being a potentially-hangable offence, and did absolutely nothing about it for nearly 10 seconds?

Or are...
Forum: Tech Log
11th Feb 2014, 11:40
Replies: 813
Views: 153,888
Posted By Chris Scott

Alpha-Floor inhibition

Quote from rudderrudderrat:
"It appears to me that the aircraft was deliberately flown below 50 RA with the speed allowed to wash off, apparently waiting for Alpha Floor to 'save the day'. "
...
Forum: Tech Log
10th Feb 2014, 23:04
Replies: 813
Views: 153,888
Posted By Chris Scott

le Bosquet

Bon soir roulis,

The copse ("bosquet") that they overflew, causing the two-second ramp of radio altimeter readings, was just outside the airfield boundary, and roughly south-east of the Rwy 02...
Forum: Tech Log
1st Feb 2014, 11:36
Replies: 813
Views: 153,888
Posted By Chris Scott

Linktrained, "Habsheim was 25 years ago but...

Linktrained,
"Habsheim was 25 years ago but still some of the lessons are there to be learned by newbies (as well as by one 86 year old !)"

Yes, it's said that when you stop learning, it's time...
Forum: Tech Log
31st Jan 2014, 00:09
Replies: 813
Views: 153,888
Posted By Chris Scott

Quote from Dozy Wannabe...

Quote from Dozy Wannabe (http://www.pprune.org/tech-log/528034-habsheim-21.html#post8288704):
"Agreed, but given their fast-and-high state, wouldn't those turns [to adjust track for Rwy 02] have...
Showing results 1 to 35 of 92
 
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