Aviation weather thread

Tenger

EI104 last night/this morning touched down at 0336. Scheduled arrival onstand is 0455.

Gaoth Laidir

deconduo wrote: »

https://www.rte.ie/news/business/2020/0209/1114198-ba-record-fast-flight/

Great photo from RTE of the 747 :pac:

Jesus, journalists are some thick ****ers alright.

Tenzor07

weisses wrote: »

KLM flew a 747 back over the Atlantic faster then the speed of sound ...That is some jet stream

I read that the 747 was traveling at a very high average speed, reaching its top speed of 825 mph at 35,000ft at one point.

The 747 definitely isn't designed to break mach 1, at least not for more than a couple of seconds, maybe minutes..

ldeayton

I live near LHR and been tracking the flights on frightradar 24 today. This morning the inbound BA from Houston(777) made a couple of attempts and held over Kent for a period before eventually diverting...to Frankfurt.

The Qantas flight outbound to Perth strangely also orbited over Kent after departure from LHR and then returned.

Gaoth Laidir

Tenzor07 wrote: »

I read that the 747 was traveling at a very high average speed, reaching its top speed of 825 mph at 35,000ft at one point.

The 747 definitely isn't designed to break mach 1, at least not for more than a couple of seconds, maybe minutes..

It was nowhere near Mach 1. It was 825 mph groundspeed, not airspeed.

ldeayton wrote: »

I live near LHR and been tracking the flights on frightradar 24 today. This morning the inbound BA from Houston(777) made a couple of attempts and held over Kent for a period before eventually diverting...to Frankfurt.

The Qantas flight outbound to Perth strangely also orbited over Kent after departure from LHR and then returned.

I believe it had a tailstrike on takeoff.

Laphroaig52

PinOnTheRight wrote: »

BA 747 JFK-LHR 4hrs56mins. Virgin 787 same route 4hrs 57 mins. Just a long Canaries

But Why?

Presumably Heathrow ATC weren't one bit impressed with these lads showing up 90 minutes early. I thought Heathrow was running to strict slots...

Why didn't they just put the brakes on over the water and save some petrol? Greta would have been impressed at that.

smurfjed

Why didn't they just put the brakes on over the water and save some petrol?

these days most airliners fly using ECON speed, this is a calculated speed based on various factors to allow the flight be operated in the most economical manner possible. So Greta should be happy with ALL flights

trellheim

Predictions for tomorrow ? just windy or cancellations en-masse ?

martinsvi

Laphroaig52 wrote: »

But Why?

Presumably Heathrow ATC weren't one bit impressed with these lads showing up 90 minutes early. I thought Heathrow was running to strict slots...

Why didn't they just put the brakes on over the water and save some petrol? Greta would have been impressed at that.

aircraft optimum operating cost is a fine balance between fuel costs, maintenance/wear and tear costs and whatever else is planned for the given air frame later on in the day. Luckily people in charge of making these calculations, unlike Greta, haven't skipped school and they know what they are doing.

Basically flying slower can mean that you will save some fuel but at the same time you are keeping aircraft airborne longer, your engines are spinning longer etc, meaning the next heavy maintenance will need to be done sooner - that is a massive cost. Then you also need to think about the situation in LHR - possibly some aircraft might need to divert, some will be delayed.. it is wise to bring in any capacity back to base as soon as you can, just in case you need to swap out some aircraft to ensure flights leave on time.

goingnowhere

The only heavy jet to go truly supersonic was the DC8 https://www.airspacemag.com/history-of-flight/i-was-there-when-the-dc-8-went-supersonic-27846699/

NH2013

goingnowhere wrote: »

The only heavy jet to go truly supersonic was the DC8 https://www.airspacemag.com/history-of-flight/i-was-there-when-the-dc-8-went-supersonic-27846699/

I believe the Convair 990A also exceeded Mach 1 during flight testing.

NH2013

Very strong winds tonight forcast for Cork, Status red warning just issued, wonder if there'll be any flights arriving in at that time, a very unfavourable direction for both runways in Cork.

Gusts of up to 75kts (139kmph) forecast which are technically hurricane force winds (gusts >64kts).

TAF EICK 191100Z
1912/2012 05013KT 4000 BR BKN005
TEMPO 1912/1920 1800 BKN003
BECMG 1912/1914 09010KT
PROB30 TEMPO 1912/1917 0700 FG BKN002
BECMG 1914/1916 17010KT
BECMG 1917/1919 14018G30KT
BECMG 1920/1922 20035G60KT
TEMPO 1920/1924 5000 RA BKN008
TEMPO 1921/1923 22040G75KT
BECMG 1923/2001 21025G45KT
BECMG 2001/2003 20025G40KT
TEMPO 2003/2012 4000 SHRA SCT010 SCT020CB

Gaoth Laidir

Ireland-shaped weather area outlined beside Ireland in today's SigWx. 😀