Search found 547 matches

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by kurtverbose
Fri Jul 19, 2019 7:16 am
Forum: Civil Aviation
Topic: Boeing Expects a $5.6 Billion Hit for 737 Max Disruptions
Replies: 128
Views: 13785

Re: Boeing Expects a $5.6 Billion Hit for 737 Max Disruptions

$5.6b actually doesn't sound that bad. The article refers to USD5.6 plus a further USD 1.7 to be spread over future accounting periods. I am not challenging that it doesn't sound too bad, but just clarifying the actual cost announced. That's 7.2 billion in total. The A350 development cost was 12.38...

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by kurtverbose
Mon Jun 17, 2019 10:50 am
Forum: Civil Aviation
Topic: Updated: Airbus announcing A321XLR
Replies: 399
Views: 69175

Re: Airbus Launches A321XLR

FrenchPotatoEye wrote:
I wouldn't be surprised by EIs to see the range actually go higher.


Isn't there quite a significan't PIP coming from Pratt?

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by kurtverbose
Tue May 28, 2019 5:43 pm
Forum: Technical/Operations
Topic: What is the dynamics or reason behind the turboprops rotating blades in opposite directions?
Replies: 22
Views: 4594

Re: What is the dynamics or reason behind the turboprops rotating blades in opposite directions?

From FlghtGlobal in 2004 : - Airbus Military has chosen a unique "handed" propeller concept for the A400M airlifter in a bid to mitigate some of the technical risk associated with integrating what will be the West's most powerful turboshaft engines on to the airframe. Also known within Air...

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by kurtverbose
Tue May 21, 2019 1:03 pm
Forum: Non-Aviation
Topic: Niki Lauda Dead at 70
Replies: 46
Views: 1823

Re: Niki Lauda, R.I.P.

If you've read his autobiography from the 80's you'll find out about his fight with Austrian Airlines, which is a real example of state controlled protectionism. Shocking how consumers were ripped off by their own government to try and support the state airline. One example was AA saying he couldn't...

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by kurtverbose
Tue Feb 26, 2019 8:29 pm
Forum: Technical/Operations
Topic: Trent XWB performance/Inflight Shutdown Rate
Replies: 19
Views: 3214

Re: Trent XWB performance/Inflight Shutdown Rate

A 777 pilot will typically go a career without an IFSD. If the A350 holds up, most airlines won't see an IFSD You have just sounded the death knell of the big twins - long live the big singles! Now, how/where are they going to mount that big engine? I propose in the tail like an L1011 but sucking u...

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by kurtverbose
Wed Jan 23, 2019 9:39 am
Forum: Civil Aviation
Topic: Small plane disappears over English Channel
Replies: 134
Views: 30683

Re: Small plane disappears over English Channel

The plane was hired by Cardiff football club and not the player They pay $15 million for the guy and fly him over the Channel on a piston single in winter? Bloody-freaking-hell... :banghead: :banghead: I wouldn't blame the club who wouldn't know about aircraft safety. Blame the operator for proposi...

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by kurtverbose
Fri Nov 02, 2018 10:58 am
Forum: Technical/Operations
Topic: 787 vs A350 range
Replies: 384
Views: 74740

Re: 787 vs A350 range

But abies111's comparing the 787-10 with the A350-900, and the capacity of the A359 is very similar to the 787-10. Given how close the A359 is to the 789 in fuel burn, it must better the 787-10 and have the ability to fly considerably futher.

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by kurtverbose
Mon Oct 29, 2018 10:34 am
Forum: Technical/Operations
Topic: 787 vs A350 range
Replies: 384
Views: 74740

Re: 787 vs A350 range

If it's correct then the A350 has a very small fuel burn penalty for the extra capability.

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by kurtverbose
Thu Oct 18, 2018 10:58 am
Forum: Technical/Operations
Topic: Would Boeing make a 757 on request?
Replies: 49
Views: 6203

Re: Would Boeing make a 757 on request?

What would full list price be, bearing in mind it's not listed?

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by kurtverbose
Thu Jul 26, 2018 3:52 pm
Forum: Technical/Operations
Topic: Fuel Burn of MD-83 vs. A319NEO and 737 MAX7
Replies: 12
Views: 3161

Re: Fuel Burn of MD-83 vs. A319NEO and 737 MAX7

viewtopic.php?t=1355819

Couldn't find the MAX
-->

MD-83 - 3060 kg/h
Airbus 320neo - 2100 kg/h

From this thread

viewtopic.php?t=1355819

Couldn't find the MAX

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by kurtverbose
Mon Jul 16, 2018 10:30 am
Forum: Civil Aviation
Topic: RR - 787 glider list
Replies: 28
Views: 6606

Re: RR - 787 glider list

Is there a list of those that are grounded but then get back in the air?

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by kurtverbose
Wed Jul 11, 2018 12:45 pm
Forum: Civil Aviation
Topic: Reuters: Airbus is studying A321XLR with extended range over LR
Replies: 470
Views: 74396

Re: Reuters: Airbus is studying A321XLR with extended range over LR

He also said he sees a new NB around 2030, so that would seem to put the kibosh on extensive changes like rewinging.

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by kurtverbose
Wed Jul 11, 2018 10:09 am
Forum: Technical/Operations
Topic: Can you tell what engine a plane is using just by looking at it?
Replies: 26
Views: 2892

Re: Can you tell what engine a plane is using just by looking at it?

How do you distinguish them on the 787 - they look almost exactly the same?

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by kurtverbose
Mon Jun 18, 2018 1:14 pm
Forum: Civil Aviation
Topic: Reuters: Airbus is studying A321XLR with extended range over LR
Replies: 470
Views: 74396

Re: Airbus is studying A321XLR to challenge Boeing

From reading the article, this just sounds like another MTOW increase for the A321. Airbus redefined what the suffix LR meant with the A321LR. All the LR represents is a 7,000lbs MTOW increase (3.5%). The ER on 737-900ER was an MTOW increase of 13,000lbs (7.8%). The LR on on the 777LR represents a ...

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by kurtverbose
Thu Jun 14, 2018 11:46 am
Forum: Civil Aviation
Topic: Etihad reports $1.52bn in losses for 2017
Replies: 42
Views: 6841

Re: Etihad reports $1.52bn in losses for 2017

James Hogan Bio from knighthoodcapital.com: - James Hogan is the founder and Executive Chairman of Knighthood Capital. He recently served as President and CEO of the Etihad Aviation Group, which he built into a US$20 billion multi billion dollar losing enterprise, achieving failing to achieve the m...

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by kurtverbose
Tue Jun 12, 2018 2:06 pm
Forum: Civil Aviation
Topic: How far could an A350-900ULR go with a standard config?
Replies: 95
Views: 20079

Re: How far could an A350-900ULR go with a standard config?

Polot wrote:
I might have missed something in this thread, where is this 5% improvement number coming from exactly?


No idea. 1% was quoted for the aerodynamics and RR quotes another 1% for the engine PIP.

5% on a still quite new design seems like fantasy to me.

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by kurtverbose
Fri Jun 08, 2018 9:57 am
Forum: Technical/Operations
Topic: High altitude flights by commercial airliners
Replies: 54
Views: 7671

Re: High altitude flights by commercial airliners

atcsundevil wrote:
I can't recall seeing a commercial aircraft being higher than FL410


*cough* - Concorde.

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by kurtverbose
Thu Jun 07, 2018 9:37 am
Forum: Technical/Operations
Topic: Number of blades on an engine
Replies: 12
Views: 2003

Re: Number of blades on an engine

Tristarsteve wrote:
Just need to find some proof.


Wikipedia pic of the 22b has 33 blades.

https://en.wikipedia.org/wiki/File:Rolls-Royce_RB211-22B_(1).jpg

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by kurtverbose
Thu May 24, 2018 8:54 am
Forum: Technical/Operations
Topic: Are the Trent 800 and PW4090/4098 engines still being made?
Replies: 12
Views: 3694

Re: Are the Trent 800 and PW4090/4098 engines still being made?

There is no longer a PW4098. Pratt bought back all examples. While some made it into museams, none are in flying condition. They we're all replaced by PW4090s at Pratt's expense. Lightsaber Huh? Why would this be? Did Not meet NOx emission requirements and fuel burn. Was pushing the design outside ...

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by kurtverbose
Sun May 06, 2018 4:31 pm
Forum: Technical/Operations
Topic: Rolls-Royce partners with Airbus for UltraFan flight tests
Replies: 10
Views: 2322

Re: Rolls-Royce partners with Airbus for UltraFan flight tests

So it maybe that the design of a super large fan with its super large containment and/or or its installations on an airframe becomes difficult. So a solution maybe to build 4 engine aeroplanes with each engine having half thrust of the equivalent twin. This may be a way of balancing the required sc...

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by kurtverbose
Fri Apr 27, 2018 7:09 am
Forum: Technical/Operations
Topic: Airbus A340 Laminar Flow Demonstrator To Fly In 2017
Replies: 160
Views: 23702

Re: Airbus A340 Laminar Flow Demonstrator To Fly In 2017

That might tie in nicely with an A 320 family replacement. Or re-winging. If they can get it grandfathered. Boeing tried giving the 747 a new wing with a reduced sweep angle several times, but wasn't allowed to do it without certifying it as a new aircraft. If that is the case, I could see Airbus g...

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by kurtverbose
Thu Apr 26, 2018 3:46 pm
Forum: Technical/Operations
Topic: Airbus A340 Laminar Flow Demonstrator To Fly In 2017
Replies: 160
Views: 23702

Re: Airbus A340 Laminar Flow Demonstrator To Fly In 2017

parapente wrote:
That might tie in nicely with an A 320 family replacement.


Or re-winging.

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by kurtverbose
Thu Apr 26, 2018 12:20 pm
Forum: Technical/Operations
Topic: RR Builds Next-Gen "Advance 3" Demo Engine
Replies: 44
Views: 19283

Re: RR Builds Next-Gen "Advance 3" Demo Engine

Flight reporting Airbus is helping with the necelle and pylon to flight test ultrafan, even though it'll be mounted on RR's own 747 flight test aircraft.

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by kurtverbose
Thu Apr 26, 2018 12:17 pm
Forum: Technical/Operations
Topic: Airbus A340 Laminar Flow Demonstrator To Fly In 2017
Replies: 160
Views: 23702

Re: Airbus A340 Laminar Flow Demonstrator To Fly In 2017

Flight reporting a 10% drag reduction, 5% fuel reduction over an 800nm stage length, and can maintain this at mach 0.79, not 0.75 as previously thought.

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by kurtverbose
Thu Apr 19, 2018 7:02 pm
Forum: Technical/Operations
Topic: Concorde cruise alt & Armstrong limit.
Replies: 13
Views: 2367

Re: Concorde cruise alt & Armstrong limit.

Concorde did in testing go higher than 60000ft. AXDN did so and I seem to remember that F-WTSB also went very high. From some forum : - here is some information from Andr Turcat's book "Concorde essais d'hier, batailles d'aujourd'hui" on that subject: March, 16th, 1973: ...They wore press...

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by kurtverbose
Thu Mar 29, 2018 8:32 am
Forum: Civil Aviation
Topic: Airbus And Boeing 2018 Orders
Replies: 605
Views: 158133

Re: Airbus And Boeing 2018 Orders

https://www.flightglobal.com/news/artic ... 9s-447186/


Delivery this year and next.
-->

fcogafa wrote:


Delivery this year and next.

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by kurtverbose
Wed Mar 21, 2018 11:50 am
Forum: Civil Aviation
Topic: Airbus officially launches 251t A330neo variant
Replies: 137
Views: 26288

Re: Airbus officially launches 251t A330neo variant

jagraham wrote:
The 789 is better, but by less than 5%. Except for MTOW and resultant range.


I'd like to know where you get that 5%? Either you have a credible source or it's a made up number that needs flushing rather than repeating. Given that the NEO isn't in airline service yet I'm calling it as bull$hit.

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by kurtverbose
Wed Mar 21, 2018 7:10 am
Forum: Civil Aviation
Topic: Airbus officially launches 251t A330neo variant
Replies: 137
Views: 26288

Re: Airbus officially launches 251t A330neo variant

With a higher aspect ratio wing than the 787, the heavier it is, the more advantage it should see. I know some claim the fuel burn comparison to the 787 is worse at range, but I'm not buying it. Parasitic drag should be similar between a 787-9 and A330-900. Induced drag should favour the A330-900. ...

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by kurtverbose
Wed Mar 21, 2018 2:53 am
Forum: Civil Aviation
Topic: Airbus officially launches 251t A330neo variant
Replies: 137
Views: 26288

Re: Airbus officially launches 251t A330neo variant

I really wonder how efficient the aircraft is at its extreme range. My bet is it's very good at shorter ranges compared to the 787, but at longer ranges its efficiency drops off and both the 787 and A350 will be much better. Nice to have the flexibility, but I think if you're mostly flying very long...

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by kurtverbose
Mon Mar 19, 2018 11:16 am
Forum: Civil Aviation
Topic: Boeing 777X Production Thread 2018
Replies: 309
Views: 84827

Re: Boeing 777X Production Thread 2018

parapente wrote:
It will be one hell of an aircraft imho.


To be honest, I don't think so. It has a later engine than the A350 but is substantially heavier for its extra capability. It is also in VLA territory. I don't see it being a disaster but I don't think it'll be anywhere near as successful as its predecessor.

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by kurtverbose
Tue Mar 13, 2018 10:08 am
Forum: Technical/Operations
Topic: Rolls-Royce takes hit on 787 and A380 blade flaws
Replies: 10
Views: 2401

Re: Rolls-Royce takes hit on 787 and A380 blade flaws

Even rate 13 is well short of 400 engines, but this from Leeham : - Oct. 5, 2017, © Leeham Co.: Airbus is gearing up to increase the production rate of the A350 from 2018’s planned 10/mo to 13/mo, perhaps as early as the following year, LNC has learned. Anyway, I'm not meaning to contradict. It's in...

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by kurtverbose
Mon Mar 12, 2018 7:23 pm
Forum: Technical/Operations
Topic: Rolls-Royce takes hit on 787 and A380 blade flaws
Replies: 10
Views: 2401

Re: Rolls-Royce takes hit on 787 and A380 blade flaws

Well this was the reason for my question as airbus only goes to rate 10 at the end of the year. Even with spare engines that's less than 300 deliveries.

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by kurtverbose
Sun Mar 11, 2018 8:52 am
Forum: Technical/Operations
Topic: Rolls-Royce takes hit on 787 and A380 blade flaws
Replies: 10
Views: 2401

Re: Rolls-Royce takes hit on 787 and A380 blade flaws

One of the little nuggets was that the cost reductions achieved on the XWB for the A359 was working well, with the loss per engine cut to £1.5 million. But this is a lot of money when you are making c 400 engines annually. They're making nothing like 400 XWB's annually. Are you saying these cost re...

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by kurtverbose
Thu Mar 08, 2018 8:50 am
Forum: Civil Aviation
Topic: Update: Hawaiian signs 787 LOI
Replies: 840
Views: 100038

Re: Update: Hawaiian signs 787 LOI

Hawaii to Europe would be a sure way to lose money fast. Europeans just have a lot more choices closer to home (cheaper) than flying all the way to Hawaii. They have choices closer to home that are cheaper than flying to Hawaii, but those choices are nothing like Hawaii. Don't get me wrong, the Can...

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by kurtverbose
Wed Mar 07, 2018 2:38 pm
Forum: Technical/Operations
Topic: Rolls-Royce takes hit on 787 and A380 blade flaws
Replies: 10
Views: 2401

Re: Rolls-Royce takes hit on 787 and A380 blade flaws

The manufacturer expects its solutions to the Trent 1000 problems, including redesigned parts, to be "fully embodied" in the fleet by 2022.


I guess not all the Trent 1000 issues are urgent then.

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by kurtverbose
Wed Mar 07, 2018 12:58 pm
Forum: Civil Aviation
Topic: Airbus A330neo Production/Delivery Thread 2018
Replies: 441
Views: 132135

Re: Airbus A330neo Production/Delivery Thread 2018

So what happens to the A338 frames?

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by kurtverbose
Tue Mar 06, 2018 2:41 pm
Forum: Technical/Operations
Topic: Next important technology?
Replies: 47
Views: 3107

Re: Next important technology?

Starlionblue wrote:
Yes but who would I chat to?!?


Well, you wouldn't have much to do with all that automation. You could spend your time posting on A.net. :D

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by kurtverbose
Tue Mar 06, 2018 1:02 pm
Forum: Technical/Operations
Topic: Next important technology?
Replies: 47
Views: 3107

Re: Next important technology?

I see big oportunities in how planes are operated at airports. I'm going to introduce a new airport vehicle which I'll call AARDVARK1 (airport aircraft recover disembark vehicle also release o'K 1). This is an electrically powered vehicle - charged by the airport infrastructure so it doesn't need a ...

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by kurtverbose
Wed Feb 21, 2018 11:19 pm
Forum: Civil Aviation
Topic: European Aviation acquires 10 A340s from EY
Replies: 24
Views: 6834

Re: European Aviation acquires 10 A340s from EY

gatibosgru wrote:
I'm dying to get a ride in an A340. I'm secretly hoping my MUC-BOS on the A359 somehow gets swapped.


I found the A346 a wonderfully quiet and comfortable plane. Subjectively even better than an A380.

The A343 was really noisy by comparison.

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by kurtverbose
Wed Feb 21, 2018 10:54 pm
Forum: Civil Aviation
Topic: European Aviation acquires 10 A340s from EY
Replies: 24
Views: 6834

Re: European Aviation acquires 10 A340s from EY

Yes, except for the MLG. https://en.wikipedia.org/wiki/Fleet_commonality "The A330 and A340 share many common features. The same cockpit is shared between the A330 and A340, however the A340 controls four engines instead of two on the A330. The A330 and A340 share the same wings, nose, tail an...

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by kurtverbose
Tue Feb 20, 2018 11:43 am
Forum: Civil Aviation
Topic: Leahy: A380 could have had better engine technology
Replies: 154
Views: 18446

Re: Leahy: A380 could have had better engine technology

shoulda, woulda. :-) 911 and the GFC each introduced strong step downs in travel demand. compare growth projections ~2000 and the actual development. For 2000 the A380 was started just right. ( extrapolate the pre 2000 curve.) ?nobody? could have known about 911 ( a major hit on demand ) ?nobody? c...

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by kurtverbose
Tue Feb 20, 2018 8:56 am
Forum: Civil Aviation
Topic: Leahy: A380 could have had better engine technology
Replies: 154
Views: 18446

Re: Leahy: A380 could have had better engine technology

The whole question of engines is correct. They should've selected the engines available around 2025, and that's when the whole project should've been launched. The market would've been desparate for a VLA then, and it would be made of carbon and have super efficient engines. There would be a signifi...

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by kurtverbose
Thu Feb 15, 2018 11:00 am
Forum: Technical/Operations
Topic: Possibility of the 797 having a T-Tail?
Replies: 62
Views: 7680

Re: Possibility of the 797 having a T-Tail?

D.B. Cooper killed off the rear air stairs. Just too tempting for passengers to try a parachute jump from.

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by kurtverbose
Wed Feb 14, 2018 9:11 am
Forum: Technical/Operations
Topic: Possibility of the 797 having a T-Tail?
Replies: 62
Views: 7680

Re: Possibility of the 797 having a T-Tail?

...er, isn't deep stall an issue?

Apart from that I think yes, Boeing should focus more on styling and heritage rather than aerodynamics and efficiency. :roll:

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by kurtverbose
Mon Feb 12, 2018 9:15 am
Forum: Civil Aviation
Topic: London City Airport (EGLC/LCY) closed due to unexploded WW2 bomb (11 Feb '18)
Replies: 32
Views: 5983

Re: London City Airport (EGLC/LCY) closed due to unexploded WW2 bomb (11 Feb '18)

lightsaber wrote:
A 214m exclusion zone implies they know the bomb size:


Unless that's the exclusion zone for the biggest bomb they know the Luftwaffe had and are preparing for worst case?

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by kurtverbose
Mon Feb 12, 2018 8:42 am
Forum: Civil Aviation
Topic: Updated: Emirates firms up order for up to 36 additional A380s
Replies: 494
Views: 61447

Re: Emirates signs a commitment for 36 additional A380's

It`s rumoured that the GP 7200 may get a PIP to make it compete more favourably with Trent 900. Since EA weren`t interested in updating the engine at the time of the last order which was virtually double this one, I`m sceptical that there really is competition for this latest order. If EA is willin...

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by kurtverbose
Sun Feb 04, 2018 7:03 pm
Forum: Technical/Operations
Topic: RR triple spool
Replies: 50
Views: 5247

Re: RR triple spool

Hmm, I'm not sure that's true. RR engines on widebodies are know for being better at shorter ranges as they have an advantage at climb and descent. I think it's particularly at descent where a 3 spool can be throttled back further than a 2 spool. Also, RR's proposal for the A320NEO was a 3 spool. I...

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by kurtverbose
Sat Feb 03, 2018 8:23 am
Forum: Civil Aviation
Topic: EY Looking to Scrape Up USD 1.2 Billion in a Hurry to Support Bonds
Replies: 43
Views: 6390

Re: Etihad is seeking to prevent a technical default of bonds

Blerg wrote:
Their biggest mistake was getting into Alitalia but James Hogan was arrogant and self-confident so he ignored all the alarms that went off.


Wikipedia says he's a businessman, but I think they forgot to put 'failed' before that title.

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by kurtverbose
Fri Feb 02, 2018 8:55 am
Forum: Technical/Operations
Topic: RR triple spool
Replies: 50
Views: 5247

Re: RR triple spool

I dont think it optimum for all phases of flight or for all flight profiles, it would be designed around cruise optimisation which is better for longer flights. I have read that twin spool is better for short haul as the aircraft spends a higher proportion of a flight in climb and descent. Hmm, I'm...

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by kurtverbose
Fri Feb 02, 2018 8:41 am
Forum: Technical/Operations
Topic: RR triple spool
Replies: 50
Views: 5247

Re: RR triple spool

The intermediate compressor on a 2 spool is turning very slowly as it's on the same shaft as the fan. They're not very efficient, which is why I guess they're called 'booster' stages. Much better on a 2 spool to add stages to the HPC. Interestingly for the 'Advance' engine RR is moving more stages t...

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