Search found 539 matches

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by kurtverbose
Mon Jul 16, 2018 10:30 am
Forum: Civil Aviation
Topic: RR - 787 glider list
Replies: 28
Views: 6038

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: 292
Views: 40030

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: 18
Views: 1338

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: 292
Views: 40030

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: 6541

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: 18360

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: 6988

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: 1749

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: 3395

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: 2078

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: 148
Views: 20844

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: 148
Views: 20844

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: 18500

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: 148
Views: 20844

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: 1980

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: 311
Views: 76143

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 28, 2018 9:28 am
Forum: Technical/Operations
Topic: why did Qantas prefer GE engines instead of RR engines in b787-9?
Replies: 19
Views: 4389

Re: why did Qantas prefer GE engines instead of RR engines in b787-9?

I don't know if they knew it at the time they ordered, but I think this post from lowbank (who I think works for RR) covers it: - I believe there was a significant difference in SFC between the two engine, the ten addresses that issue. So maybe it will start to pick up more orders now. Until the TEN...

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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: 25171

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: 25171

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: 25171

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: 164
Views: 38278

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: 2218

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: 2218

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: 2218

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: 96964

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: 2218

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: 268
Views: 71802

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: 2844

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: 2844

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: 6459

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: 6459

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: 17814

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: 17814

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: 7034

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: 7034

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: 5674

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: 59692

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: 4873

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: 6237

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: 4873

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: 4873

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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by kurtverbose
Thu Jan 18, 2018 10:46 am
Forum: Technical/Operations
Topic: Honest Discussion. Which Plane is More Efficient.....The A351 or 779?
Replies: 61
Views: 4603

Re: Honest Discussion. Which Plane is More Efficient.....The A351 or 779?

Please recall the GE9X will have variable cycle technology. There will be reduced turbine cooling at cruise, already in the LEAP engines. RR already has this for the 97. I think also the Trent 1000-TEN. Do you have a link? To my knowledge, the LEAP was the first variable cycle technology to hit the...

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by kurtverbose
Wed Jan 17, 2018 9:10 am
Forum: Technical/Operations
Topic: Honest Discussion. Which Plane is More Efficient.....The A351 or 779?
Replies: 61
Views: 4603

Re: Honest Discussion. Which Plane is More Efficient.....The A351 or 779?

lightsaber wrote:
Please recall the GE9X will have variable cycle technology. There will be reduced turbine cooling at cruise, already in the LEAP engines.


RR already has this for the 97. I think also the Trent 1000-TEN.

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by kurtverbose
Wed Jan 17, 2018 9:00 am
Forum: Civil Aviation
Topic: A350-2000 Doable with new technologies, more potential with 787 : Bregier
Replies: 74
Views: 15155

Re: A350-2000 Doable with new technologies, more potential with 787 : Bregier

keesje wrote:
A next generation of RR/GE engines is worth waiting for.


Especially as they'll be able to lengthen the fuselage without increasing MTOW because they should need less fuel.

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by kurtverbose
Tue Jan 16, 2018 7:51 pm
Forum: Technical/Operations
Topic: Honest Discussion. Which Plane is More Efficient.....The A351 or 779?
Replies: 61
Views: 4603

Re: Honest Discussion. Which Plane is More Efficient.....The A351 or 779?

Don't OPR efficiency gains diminish the higher you go?

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by kurtverbose
Mon Jan 15, 2018 3:08 pm
Forum: Technical/Operations
Topic: Honest Discussion. Which Plane is More Efficient.....The A351 or 779?
Replies: 61
Views: 4603

Re: Honest Discussion. Which Plane is More Efficient.....The A351 or 779?

zeke wrote:
The major component of drag in cruise is skin friction, they have been very quiet on how the extra wing area, extra engine nacelle area, and extra fuselage area is going to increase skin friction drag.


Won't that be partly offset by the higher altitudes the 777X will be capable of?

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by kurtverbose
Mon Jan 15, 2018 11:25 am
Forum: Technical/Operations
Topic: Honest Discussion. Which Plane is More Efficient.....The A351 or 779?
Replies: 61
Views: 4603

Re: Honest Discussion. Which Plane is More Efficient.....The A351 or 779?

Aside from the fact one hasn't even flown yet, providing the sources of your research would be helpful. Otherwise, everything you posted is pure conjecture: Not all conjecture, there's also the analysis he saw. No idea who wrote it though as there's no source. One analysis I saw predicted the 779 w...

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by kurtverbose
Mon Jan 15, 2018 10:18 am
Forum: Technical/Operations
Topic: Honest Discussion. Which Plane is More Efficient.....The A351 or 779?
Replies: 61
Views: 4603

Re: Honest Discussion. Which Plane is More Efficient.....The A351 or 779?

Hmm. I can't see the numbers behind that, to be frankly. Who's analyses is that? He has a history of quoting stuff without a single source. It's an interesting topic, but pointless arguing about made up numbers. For the record, it's likely that the engine and wing will be better on the 777. The eng...

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by kurtverbose
Sun Dec 31, 2017 12:14 pm
Forum: Civil Aviation
Topic: AIRBUS 2020-2030 development projects A360, A370 opportunities.
Replies: 289
Views: 49087

Re: AIRBUS 2020-2030 development projects A360, A370 opportunities.

Imho the "perfect" size fuselage for this segment is the 767, but it needs a new engine. Doesnt seem likely to happen. The 222 inch Airbus fuselage is too big imho and the 148/156 inch 737/A320 fuselage is too small. A twin aile that narrow is not efficient unless you go for a non-circula...

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by kurtverbose
Sun Dec 31, 2017 12:12 pm
Forum: Civil Aviation
Topic: AIRBUS 2020-2030 development projects A360, A370 opportunities.
Replies: 289
Views: 49087

Re: AIRBUS 2020-2030 development projects A360, A370 opportunities.

There'll be a narrowbody realignment. The A320/321 will be rewinged and grow a bit. The C series will get a 500 and fill in the lower end of the market. Widebody's - I can see there being an A350-2000 or whatever it's called. I don't know what happens to the A330. I don't know if there'll be a const...

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