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Heathrow-2

Old 26th Feb 2018, 20:14
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The problem with a steeper glide path is that depending on the aircraft type, conditions, and - quite frankly - the pilot's energy management skills, it can often be more difficult to control the speed of the aircraft, something which is of particular importance to Heathrow and Gatwick arrivals.

It would almost certainly result in more speed brake on approach, more early gear extension and, as a result, more noise. Counterproductive.
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Old 26th Feb 2018, 20:29
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HAL are lauding the CDA as a success. On the small Airbus gear is down later than 6 miles.
On the heavies and super heavies they stick to the norm.
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Old 26th Feb 2018, 21:31
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Originally Posted by 4Greens View Post
It doesn't seem very much to me
On the contrary, it appears to be almost twice as steep as a 3 approach




Slightly steeper approach trial update

Originally Posted by 4Greens View Post
can it be used in some form of instrument approach ?
In theory the ILS/MLS could have been adjusted to the steeper angle, but that would have required all landing traffic to make use of it. Instead, a 3.2 RNAV approach was created for use by the airlines participating in the trial.

Last edited by DaveReidUK; 27th Feb 2018 at 06:58. Reason: punctuation!
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Old 27th Feb 2018, 18:00
  #364 (permalink)  
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I wonder if the folks whose S/H rotations are being canx this week, have considered the diff if we had R3 ...

[I'll get my hat] {AND coat as it's dashed parky today}
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Old 28th Feb 2018, 07:51
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PAXBOY
BA always cancel short haul first, what ever the reason. A bus up the M6 to MAN after a long haul flight is one of the reasons I no longer use BA or LHR. I think other northern based FF may also have a similar view. -6c up here today but still got out to office,though a bit lonely as gritters in this part of West Yorkshire appear to be a bit hens teeth like today, 4x4 very useful for going up hill even if just a big toboggan going down if not careful !
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Old 28th Feb 2018, 11:45
  #366 (permalink)  
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Originally Posted by Mr Mac View Post
PAXBOY
BA always cancel short haul first, what ever the reason.
Though not exclusively - according to thebasource.com, yesterday's cancellations also included LAX and JFK rotations.

But it's true that most of the canx were short-haul, affecting the following LHR routes:

ABZ, AMS, ARN, BRU, BSL, CDG, CPH, DME, DUB, DUS, EDI, FRA, GLA, GVA, HAM, LBA, LIN, MAD, MAN, MUC, NCL, OSL, TLS, TXL and ZRH
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Old 28th Feb 2018, 11:56
  #367 (permalink)  
 
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Originally Posted by DaveReidUK View Post
On the contrary, it appears to be almost twice as steep as a 3 approach




Slightly steeper approach trial update



In theory the ILS/MLS could have been adjusted to the steeper angle, but that would have required all landing traffic to make use of it. Instead, a 3.2 RNAV approach was created for use by the airlines participating in the trial.
Incorrect - the ILS could not have been adjusted as the glide slope would physically need to be moved to accommodate the extra angle. Some aircraft utilising LHR at the time of the initial trial were also not certified to fly above a 3.15 angle. You are also unable to offer CATIII approaches over 3.15 so resilience would take a hit. The RNAV was the best option and allowed HAL to keep a CATIII approach in place for resilience
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Old 28th Feb 2018, 12:09
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Originally Posted by destinationsky View Post
Incorrect - the ILS could not have been adjusted as the glide slope would physically need to be moved to accommodate the extra angle. Some aircraft utilising LHR at the time of the initial trial were also not certified to fly above a 3.15 angle. You are also unable to offer CATIII approaches over 3.15 so resilience would take a hit. The RNAV was the best option and allowed HAL to keep a CATIII approach in place for resilience
Er, yes - that's why I said "in theory", with the caveat that it wouldn't have been practicable for a variety of reasons.
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Old 28th Feb 2018, 12:50
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Anything is possible "in theory" :-)
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Old 28th Feb 2018, 15:32
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Clapham

In Clapham they have more to worry about the noise of emergency vehicles darting around 24/7, and if they looked up they take there eye of the ball watching out for robbers on scooters and rogue cyclists
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Old 7th Mar 2018, 20:35
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https://amp.belfasttelegraph.co.uk/news/uk/ryanair-boss-attacks-heathrow-expansion-cost-36675472.html?__twitter_impression=true
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Old 11th Mar 2018, 10:24
  #372 (permalink)  
 
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http://www.independent.co.uk/travel/news-and-advice/uk-australia-non-stop-flight-qantas-airlines-16-hours-double-price-travel-a7704616.html?amp&__twitter_impression=true
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Old 11th Mar 2018, 21:11
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It's rather like the pic that Heathrow are putting out to give the impression that plane emissions don't affect anywhere outside the airport boundary


https://t.co/lNJRVyP948
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Old 11th Mar 2018, 23:38
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In fig 2 above, which particular aircraft does that departure.Half the runway used and a steep climb on full power? If it is westbound what are all those large buildings to the west?
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Old 12th Mar 2018, 16:33
  #375 (permalink)  
 
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New York.................
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Old 12th Mar 2018, 16:38
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An A320 would be around 1500 ft crossing the fenceline on climbout according to fr24.
The buildings just represent buildings, the larger buildings to the west would be Slough.
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Old 12th Mar 2018, 18:09
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Hainan will launch trice weekly Changsha service with B788 eff. 23rd March

Tianjin Airlines (plans) to launch twice weekly Tianjin-Xian-LHR service with A332 eff. 7th May
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Old 13th Mar 2018, 10:22
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Any ideas as to where the slots have come from?
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Old 13th Mar 2018, 16:36
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Fig 2 is fake material, common practice, so a lumbering A380, 747, and 777ULR
would be where?
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Old 13th Mar 2018, 21:53
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https://amp.theguardian.com/uk-news/2018/mar/13/cost-heathrow-third-runway-mps-justine-greening-vince-cable?CMP=share_btn_tw&__twitter_impression=true
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