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Next generation aircrafts speed review

Posted by dzsoki on 23 November 2013 - 02:56 PM

I've just noticed that some of the next generation aircrafts speed are too high in AE.

The factory speed specifications means that the quoted Mach speed can be achieved at the aircrafts service ceiling (usually between 35000-40000 feet), where the air is thinner and the engines speedwise are not so efficient, so the aircraft moves slower on these altitudes.

If we take a typical cruise speed of Mach 0.85 this gives us different speeds according to the altitude:
-647,7 mph at sea level (the affected aircrafts speed converted at sea level)
-569 mph at 35000 feet
-561 mph at 40000 feet
http://www.globalair...g/converter.htm

Example:
In AE we have two speeds for these aircrafts:
-Boeing 747-8I --> AE speed 570mph
Factory specification:
Typical Cruise Speed (at 35,000 feet) Mach 0.855 (Intercontinental)
http://www.boeing.co...fact_sheet.page

-Boeing 787-8 --> AE speed 647 mph
Factory specification: Cruise Speed: Mach 0.85
http://www.boeing.co.../787-8prod.page

The above mentioned aircrafts should have approx. the same speed in AE. Dreamliners are not faster by 13,5% than the 747-8I, the 647mph data I think is just a misunderstanding from converting Mach 0.85 to mph speeds at sea level.


The affected aircraft types are the following (recommended corrected speeds):
-Airbus A350 series (580 mph)
-Airbus A380 (580 mph Rolls; 571 mph GenX)
-Boeing 787-8 (571 mph Rolls; 570 mph GenX)
-Boeing 787-9 (580 mph Rolls; 570 mph GenX)

This correction would affect a lot of users, so I think these errors should be corrected in the future, when you will have a version upgrade in the game.

I shall correct the data for these aircraft right away, all it will do is cause some minus hours, which will then need to be sorted when thr aircraft is replaced

Thanks for the fast corrections. :)
I hope it won't cause too much problems for the users who have large amounts from these types.

Well, this speed correction killed the A350s benefit compared to 787 and A340. :P It's fuel burn is higher than the A340-300 ones, both absolute and when including speed.

One thing is sure, the cruise speed of the above mentioned aircrafts are around Mach 0.85 at their service level. None of them are significantly faster than the other, especially not by 10-15%. (if this advantage would exist, all marketing teams would emphasize this capability over the rivals "with XYZ you will have 7 hours trip, while with WWW you will arrive 1 hour faster")

This is an Airbus A350 presentation which also confirms Mach 0.85 cruise speed for this series:
http://as777.com/boa...ata/img/103.pdf

Regarding the fuel consumption of the A350 series:
-Introduction Expected mid-2014 (-900), mid-2016 (-800) to mid-2017 (-1000)
-It's not possible to find exact, real performance data from the operators, becuse this series is still not in service.
-The above mentioned presentation quotes the following development targets:
A350-800 as reference vs. 787-8 (6% more block of fuel consumption with 787-8)
A350-900 as reference vs. 787-9 vs. 777-200ER (4% more block of fuel consumption with 787-9, and 30% more with 777-200ER)

I'm sure Airbus will develop a competitive A350 series, and if the real fuel consumption performance will be revealed it's will be corrected by Northern. :)

Actually, airlines and manufacturers do that (or you see it when booking). Especially those newer generation aircraft are significantly faster than older and shorthaul ones: A320 have cruise speeds of mo .78, A330 of mo .82, A380 of mo .855, 737 classic and CRJ of mo .74
This can lead to an A380 taking 9:30 hours for FRA-PEK and an A340 taking 9:55 hourse for MUC-PEK.

This can lead to an A380 taking 9:30 hours for FRA-PEK and an A340 taking 9:55 hourse for MUC-PEK.
The speeds of these aircraft in AE are the following right now:
A340-200 545-549 mph
A380 571-580 mph
So everything is right here this 4-5% speed advantage is realistic.

Before this change the speed of an A380 was approx 647 mph so the game told that an A380 was approx. 17,85% faster than the A340, which is obviously not right. That quoted route for FRA-PEK should took an A380 just 8:25 with that data.
Also the debated 677 mph with an A350 would mean that this aircraft would took FRA-PEK at just 8:02.
Show me an A350 marketing presentation which advertises this aircraft with this capability....

Actually, airlines and manufacturers do that (or you see it when booking).
I said that this speed difference is not exist between the new generation planes, not compared to the old ones.
You won't see advertisements that an A350 or an A380 is XYZ faster than a Dreamliner and vice versa.
-Airbus A350 series
-Airbus A380
-Boeing 787-8
-Boeing 787-9

Also the speed difference is not so significant between the old and the new generation, than it was before this correction. Please check the real world differences below:
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