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Old Nov 10, 2021, 10:58 am
  #586  
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Originally Posted by Sigwx
Personally I’ve found RRs take the longest to achieve the take off thrust setting from hitting the TOGA switches.
Might this be something to do with the three-spool structure of the engine?
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Old Nov 10, 2021, 11:00 am
  #587  
 
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Originally Posted by Globaliser
Might this be something to do with the three-spool structure of the engine?
No doubt at all.
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Old Nov 10, 2021, 12:10 pm
  #588  
 
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In the good old days with the rb211, the Captain would set the initial thrust and the Flight Engineer was responsible for setting take off thrust. That was before toga switches.
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Old Nov 10, 2021, 2:17 pm
  #589  
 
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Originally Posted by rapidex
In the good old days with the rb211, the Captain would set the initial thrust and the Flight Engineer was responsible for setting take off thrust. That was before toga switches.
It was FADEC that replaced the engineer, toga switches existed with the rb211
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Old Nov 10, 2021, 4:29 pm
  #590  
 
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Originally Posted by Sigwx
Just to add a little more to rapidex; we set an initial spool up setting that equates to around circa 40-45% of the engines rated power dependant on engine type. On GEs CFMs and CFs it’s a percentage of N1(front of engine) fan speed. On the likes of RRs or IAEs it’s an engine pressure ratio or EPR. This enables any early gremlins to be identified but also allows for uniform and symmetric application of the take off power/thrust setting for that particular take off.
There is a spool up prior to the final application of take off power regardless of type. I think only Concorde avoided that and even turbo prob types do this.
Personally I’ve found RRs take the longest to achieve the take off thrust setting from hitting the TOGA switches. CFM 56s on the 737s would spoil up fast but would pause for a moment prior to ‘trimming’ up to the final N1setting. This prevented the auto throttle over setting the take off N1. Pretty much all engines ‘gain’ from a ram rise effect during the take off run. I find that from commuting on the 320 fleet that they spool up quite quickly but the NEOs seem to take slightly longer too, but with larger fan blades this is hardly surprising.
Thank you for taking the time to do this. This was really interesting and informative
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Old Nov 10, 2021, 9:33 pm
  #591  
 
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Nice to see the Ask the Staffer thread back - as I’m sure there will be a few questions regarding changes in this new travel day and age.

I flew BA today on 209 - LHR-MIA, and noticed a new addition to the crew, and was curious about it.

As well as the cabin service manager, who I guess is responsible for the whole crew etc, there was another silver tie cabin crew member, who spent a long time coming up and introducing himself, and welcoming us gold card (and above) back on board. He spent a good 5+ minutes with each of us in Club - about 5 of us I noted. His job title badge - sorry I forget the exact title - was like Cabin Experience Manager - or words to that effect. Not one I had seen before. He seemed extra to the 2 crew assigned to each side of the airplane, but mucked in as where required, delivering food drinks etc.

He came by often, especially to the GCH’s, to check everything was alright inflight, did we need anything else, asking if anything not quite right etc.
I fed back that from wheels up to first drink offer - 1 hour and 15 mins, was too long IMO. He agreed, and said crew were being flung onto aircraft and not sure what was where etc, and it was just taking a little bit longer, on the now totally full TATL flights. Meal service to tray removal, was almost 3 hours from takeoff. I mean I don’t care much as its a day flight, and I haven’t got much else to do, but on a night flight return, that might be an issue for some.

Wonder from those in the know, if this is a permanent position, or just a thing whilst BA get back in to their groove….. the CSM didn’t come speak to us once, just got on with her job. Which was fine, as the other crew member did the FF welcome pleasantries instead.
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Old Nov 11, 2021, 2:01 am
  #592  
 
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Originally Posted by Jet Ranger
I flew BA today on 209 - LHR-MIA, and noticed a new addition to the crew, and was curious about it.

As well as the cabin service manager, who I guess is responsible for the whole crew etc, there was another silver tie cabin crew member, who spent a long time coming up and introducing himself, and welcoming us gold card (and above) back on board. He spent a good 5+ minutes with each of us in Club - about 5 of us I noted. His job title badge - sorry I forget the exact title - was like Cabin Experience Manager - or words to that effect. Not one I had seen before. He seemed extra to the 2 crew assigned to each side of the airplane, but mucked in as where required, delivering food drinks etc.
.
These roles appear intermittently on flights as part of the QA / Crew Management process. (And when they fancy a jolly)
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Old Nov 11, 2021, 2:49 am
  #593  
 
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Originally Posted by Globaliser
Might this be something to do with the three-spool structure of the engine?
More shafts, blades etc = more inertia to overcome. But also larger (and newer) engines have higher airflow ratios and need to carefully manage the airflow between compression and combustion. If they spool up too quickly they can force more air into the engine than it can use.

There is a spool up time requirement for civilian aircraft, from memory i think it is 6 seconds?
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Old Nov 11, 2021, 3:14 am
  #594  
 
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Originally Posted by Jet Ranger
Nice to see the Ask the Staffer thread back - as I’m sure there will be a few questions regarding changes in this new travel day and age.

I flew BA today on 209 - LHR-MIA, and noticed a new addition to the crew, and was curious about it.

As well as the cabin service manager, who I guess is responsible for the whole crew etc, there was another silver tie cabin crew member, who spent a long time coming up and introducing himself, and welcoming us gold card (and above) back on board. He spent a good 5+ minutes with each of us in Club - about 5 of us I noted. His job title badge - sorry I forget the exact title - was like Cabin Experience Manager - or words to that effect. Not one I had seen before. He seemed extra to the 2 crew assigned to each side of the airplane, but mucked in as where required, delivering food drinks etc.

He came by often, especially to the GCH’s, to check everything was alright inflight, did we need anything else, asking if anything not quite right etc.
I fed back that from wheels up to first drink offer - 1 hour and 15 mins, was too long IMO. He agreed, and said crew were being flung onto aircraft and not sure what was where etc, and it was just taking a little bit longer, on the now totally full TATL flights. Meal service to tray removal, was almost 3 hours from takeoff. I mean I don’t care much as its a day flight, and I haven’t got much else to do, but on a night flight return, that might be an issue for some.

Wonder from those in the know, if this is a permanent position, or just a thing whilst BA get back in to their groove….. the CSM didn’t come speak to us once, just got on with her job. Which was fine, as the other crew member did the FF welcome pleasantries instead.
These are individuals who used to be Inflight Business Managers. They were all split up and some of them are now 'Customer Experience Managers'. They're ground based but sometimes fly to observe the cabin service and see what is or isn't working. Allegedly they're also there to support crew back from furlough. Strangely enough, you see them a fair bit on MIA/JFK/ORD/IAD etc but not so much (i.e never) on the BLR/ISB/LHE/LOS/MAA. Funny that.
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Old Nov 23, 2021, 5:24 am
  #595  
 
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Hong Kong Crews

I follow a Cathay Pacific B748F pilot on Instagram and she, along with over 100 CX crew were ‘detained’ in Hong Kong’s quarantine facilities last week due to 3 CX pilots contracting Covid on a Frankfurt stop-over. While most of the CX crews have now been released, I read that a BA crew were detained this past weekend and could be held for up to 21 days in quarantine, which is certainly not what any crew have signed up to. How is the entire HKG quarantine situation impacting crewing for these flights (I am guessing nobody wants to staff these flights given the above issues) and are BA looking at bringing back the no-crew stay down route option for this service?

Pilot37
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Old Nov 23, 2021, 5:28 am
  #596  
 
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Originally Posted by Pilot37
Hong Kong Crews

I follow a Cathay Pacific B748F pilot on Instagram and she, along with over 100 CX crew were ‘detained’ in Hong Kong’s quarantine facilities last week due to 3 CX pilots contracting Covid on a Frankfurt stop-over. While most of the CX crews have now been released, I read that a BA crew were detained this past weekend and could be held for up to 21 days in quarantine, which is certainly not what any crew have signed up to. How is the entire HKG quarantine situation impacting crewing for these flights (I am guessing nobody wants to staff these flights given the above issues) and are BA looking at bringing back the no-crew stay down route option for this service?

Pilot37
I too have seen the account to which you refer. For reasons known to the BA flight crew community you are unlikely to get a response to this for the time being.
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Old Nov 23, 2021, 5:28 am
  #597  
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Are they still being detained in breeze block pre-fabs, Camp Tenko style? I'm not sure this is HK's best method for returning to the international stage, but by all accounts that ship sailed some time ago (and possibly on the RYB).
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Old Nov 23, 2021, 5:32 am
  #598  
 
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Originally Posted by corporate-wage-slave
Are they still being detained in breeze block pre-fabs, Camp Tenko style? I'm not sure this is HK's best method for returning to the international stage, but by all accounts that ship sailed some time ago (and possibly on the RYB).

Sadly yes - this is Hong Kong’s quarantine camp on Penny Bay

Picture Credit - Not mine but would rather not post their details on this forum.

Pilot37
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Old Nov 23, 2021, 5:35 am
  #599  
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Originally Posted by Pilot37
Sadly yes - this is Hong Kong’s quarantine camp on Penny Bay
Tenko would have been an upgrade!
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Old Nov 23, 2021, 5:40 am
  #600  
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Originally Posted by corporate-wage-slave
I'm not sure this is HK's best method for returning to the international stage....
Sorry I know this is O/T, but I don't think there is any intention to do so.
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