Search found 463 matches

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by kurtverbose
Sat Oct 14, 2017 5:33 am
Forum: Technical/Operations
Topic: Safran inaugurates open rotor test program
Replies: 27
Views: 8568

Re: Safran inaugurates open rotor test program

I read that when RR looked at open rotors they looked at the Allison experience (they took over Allison who had worked with P&W on the propfan), and weren't very impressed with their attempts at noise attenuation. Specifically, making the rear rotor smaller than the front makes a big difference....

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by kurtverbose
Thu Oct 05, 2017 8:12 am
Forum: Technical/Operations
Topic: Cabin noise comparision A330 / B787 / B777
Replies: 52
Views: 8122

Re: Cabin noise comparision A330 / B787 / B777

Ok - sorry to have missed the humour. My bad.

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by kurtverbose
Mon Oct 02, 2017 10:54 am
Forum: Technical/Operations
Topic: Cabin noise comparision A330 / B787 / B777
Replies: 52
Views: 8122

Re: Cabin noise comparision A330 / B787 / B777

The 777 flies in the same flight altitude regime as all other large jet powered passenger airplanes, about FL280 to FL410. The fact that the heavier -300ER on a 14hr flight may stay at FL280-320 for a bit longer than, say, an A380 or 787, has minimal impact on turbulence, the worst weather related ...

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by kurtverbose
Mon Oct 02, 2017 2:59 am
Forum: Technical/Operations
Topic: Cabin noise comparision A330 / B787 / B777
Replies: 52
Views: 8122

Re: Cabin noise comparision A330 / B787 / B777

In terms of noise the A343 and A346 are completely different aircraft. The A343 is like sitting in a room with a lot of teenage girls drying their hair. On the A346 I was waiting for the engines to spool up at takeoff, but we just surged forward with little extra noise. A fabulously quiet and comfor...

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by kurtverbose
Wed Sep 20, 2017 9:11 pm
Forum: Civil Aviation
Topic: A330neo MTOW increase
Replies: 180
Views: 35382

Re: A330neo MTOW increase

keesje wrote:
BTW I saw the MEO prototype a few hrs ago at TLS


Massive Engine Option? :D

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by kurtverbose
Tue Sep 19, 2017 7:54 pm
Forum: Technical/Operations
Topic: Rolls Gearbox Hits Record Power Level
Replies: 20
Views: 3857

Re: Rolls Gearbox Hits Record Power Level

My guess would be that the MT30 does not need a reduction gear at all. To just make electricity (which I think is how most of these ships are actually driven when powered by gas turbines) I don't think you need a gearbox, but I'm happy to be corrected about this. For a ship with a propeller driven ...

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by kurtverbose
Mon Sep 18, 2017 6:30 pm
Forum: Technical/Operations
Topic: Rolls Gearbox Hits Record Power Level
Replies: 20
Views: 3857

Re: Rolls Gearbox Hits Record Power Level

Do we know that this gearbox has marine applications? I'd have thought weight would be no where near as important either for mechanical or alternator drive. Case in point, the MT30 weighs 6.5 tonnes, but 30 tonnes when packaged.

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by kurtverbose
Thu Sep 07, 2017 10:57 am
Forum: Civil Aviation
Topic: EK to study all-economy A380 to combat low cost carriers
Replies: 101
Views: 20452

Re: EK to study all-economy A380 to combat low cost carriers

They should call the lowest class 'Scum class' to encourage people to upgrade.

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by kurtverbose
Wed Sep 06, 2017 10:26 am
Forum: Civil Aviation
Topic: PW 1100G vs CFM LEAP, Can Pratt Make it Right ?
Replies: 43
Views: 13995

Re: PW 1100G vs CFM LEAP, Can Pratt Make it Right ?

What is really remarkable is that all companies have problems with products - Rolls with the RB211, GE with the initial GE90, Airbus with the A380 and Boeing with the 787. But all these companies learnt. They weren't serial failures. Pratt on the other hand, one failure after another. They have lear...

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by kurtverbose
Tue Sep 05, 2017 7:03 pm
Forum: Technical/Operations
Topic: Rolls Gearbox Hits Record Power Level
Replies: 20
Views: 3857

Re: Rolls Gearbox Hits Record Power Level

Imagine how many food mixers that could power. Dinner for thousands ready in seconds. GE very quiet on gears. P&W very quiet on a widebody GTF. Could RR have a jump on both come the next generation of widebody engines? I'm also intrigued about P&W's patents. Gearbox's have been around foreve...

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by kurtverbose
Fri Aug 25, 2017 10:56 am
Forum: Technical/Operations
Topic: RR Trent XWB - does XWB stand for anything?
Replies: 15
Views: 2372

Re: RR Trent XWB - does XWB stand for anything?

ikolkyo wrote:
kurtverbose wrote:
ConcordeAlpha wrote:
XWB stands for Extra Wide Body.


When have RR stated that XWB stands for Extra Wide Body for it's engine?


You are over thinking it.... A350XWB - Trent XWB...... Pretty simple.


I'm not over thinking it, I asking if there's anything more to it. Pretty simple.

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by kurtverbose
Sun Aug 20, 2017 6:36 am
Forum: Technical/Operations
Topic: RR Trent XWB - does XWB stand for anything?
Replies: 15
Views: 2372

Re: RR Trent XWB - does XWB stand for anything?

When have RR stated that XWB stands for Extra Wide Body for it's engine? RR haven't said it, it's just that logically XWB stands for extra wide body. Airbus A350 XWB - XWB stands for extra wide body. I wrote what XWB stands for in the opening post. You've not taken us any further forward than an as...

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by kurtverbose
Sat Aug 19, 2017 10:38 am
Forum: Technical/Operations
Topic: RR Trent XWB - does XWB stand for anything?
Replies: 15
Views: 2372

Re: RR Trent XWB - does XWB stand for anything?

ConcordeAlpha wrote:
XWB stands for Extra Wide Body.


When have RR stated that XWB stands for Extra Wide Body for it's engine?

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by kurtverbose
Sat Aug 19, 2017 7:53 am
Forum: Technical/Operations
Topic: RR Trent XWB - does XWB stand for anything?
Replies: 15
Views: 2372

RR Trent XWB - does XWB stand for anything?

I know it was named after the A350 XWB (eXtra Wide Body), but does it actually stand for anything? I can't find any reference.

My guesses: -

eXtremely Wide Bypass.

Actually, that's all I could think of.

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by kurtverbose
Fri Aug 18, 2017 7:40 pm
Forum: Technical/Operations
Topic: Difference between piston engine and turbine engine
Replies: 11
Views: 5923

Re: Difference between piston engine and turbine engine

In case it matters, the aircraft type of interest is DC3. When a piston engine is replaced by a gas turbine you notice the engine installation is a lot further forward. This is because, as has been stated, the gas turbine will be a lot lighter. The twin wasp engines in a DC3 weigh about 600kg each....

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by kurtverbose
Fri Aug 18, 2017 7:32 pm
Forum: Technical/Operations
Topic: RR Prepares T1000-TEN First Flight
Replies: 103
Views: 20527

Re: RR Prepares T1000-TEN First Flight

Top TEN!

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by kurtverbose
Wed Aug 09, 2017 8:17 pm
Forum: Technical/Operations
Topic: RR Prepares T1000-TEN First Flight
Replies: 103
Views: 20527

Re: RR Prepares T1000-TEN First Flight

Funny how there's much more from RR on twitter than there is on their own website.

They are a nice looking pair (Ooh er).

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by kurtverbose
Tue Aug 08, 2017 9:00 pm
Forum: Technical/Operations
Topic: RR Prepares T1000-TEN First Flight
Replies: 103
Views: 20527

Re: RR Prepares T1000-TEN First Flight

All I hear is it will be the 'standard build'. I don't know if previous versions continue to be available. I don't know about 75% new parts. The Intermediate compressor is new - 'rising line' as in the XWB. The HP has blisks on the first 3 stages. I think it also has reprofiled compressor blades. I ...

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by kurtverbose
Thu Jul 13, 2017 6:26 pm
Forum: Civil Aviation
Topic: Woman dies at SXM after falling from jet blast
Replies: 157
Views: 30560

Re: Woman dies at SXM after falling from jet blast

Why don't they have deployable blast doors like on aircraft carriers, then people could use the beach without the excitement of being killed?

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by kurtverbose
Tue Jun 20, 2017 8:53 pm
Forum: Civil Aviation
Topic: Boom: NYC-LON Mach 2.2 Startup
Replies: 100
Views: 31235

Re: Boom: NYC-LON Mach 2.2 Startup

What is the fastest a turbofan has been without afterburning? To my knowledge it's certainly not Mach 2.

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by kurtverbose
Fri Jun 02, 2017 12:28 pm
Forum: Civil Aviation
Topic: Can the A350-1000 live up to Airbus’s expectations?
Replies: 158
Views: 42104

Re: Can the A350-1000 live up to Airbus’s expectations?

The quote was about the A350 had become to capable for regional use to be considered, to back up that the A350-1000 was not capable enough Thank you mjoelnir. I didn't think the contradiction needed explaining but apparently it did. Before anything changed the -1000 was perfect for EK's 777-300 rep...

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by kurtverbose
Fri Jun 02, 2017 10:32 am
Forum: Civil Aviation
Topic: Can the A350-1000 live up to Airbus’s expectations?
Replies: 158
Views: 42104

Re: Can the A350-1000 live up to Airbus’s expectations?

Why do you continually quote things that you say backs up your case when they clearly don't? I don't see a problem with the quote and his comment... The quote was about the A350 had become to capable for regional use to be considered, to back up that the A350-1000 was not capable enough Thank you m...

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by kurtverbose
Fri Jun 02, 2017 6:58 am
Forum: Civil Aviation
Topic: Can the A350-1000 live up to Airbus’s expectations?
Replies: 158
Views: 42104

Re: Can the A350-1000 live up to Airbus’s expectations?

This is exactly right. I would add that EK was specifically concerned with the A350 covering long range 77W missions from DXB where summer temps can go over 120 degrees. They have expressed a similar concern regarding the 787-10.... (I.e. maybe it's "underpowered"). Can an A350k fly a 700...

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by kurtverbose
Wed May 31, 2017 8:59 pm
Forum: Civil Aviation
Topic: Can the A350-1000 live up to Airbus’s expectations?
Replies: 158
Views: 42104

Re: Can the A350-1000 live up to Airbus’s expectations?

EK said at the time of the cancellation of the A350 order that they felt the A350 was under-powered for their needs and did not have the payload capability of the 777X. I'd like to see a source for that because I think it's rubbish? The original A350 order was for regional routes. Emirates backed o...

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by kurtverbose
Tue May 30, 2017 7:04 pm
Forum: Technical/Operations
Topic: Could Concorde go Supersonic when full?
Replies: 14
Views: 4996

Re: Could Concorde go Supersonic when full?

A bit of research and I found a flight profile on this website: - http://www.blodtandsmidigt.com/concordeprofiles.html It doesn't say the route or give weights but it's a +3.5hr flight so must be at or near MTOW. Concorde goes supersonic within 20 mins of takeoff, and is at mach 2 30 mins after take...

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by kurtverbose
Mon May 29, 2017 4:34 pm
Forum: Civil Aviation
Topic: Airbus A330neo production and delivery thread - 2016-2017
Replies: 759
Views: 235071

Re: A330 NEO Production And Delivery Thread Part 1

At 25-45k lbf thrust the UltraFan concept is more a 757-sized engine and would not be suitable for the A330. I know you keep saying that ultrafan will only go up to 45k, but it's just a technology demonstrator for an architecture for all thrust classes. RR have been very clear that this is their fu...

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by kurtverbose
Sun May 28, 2017 9:22 pm
Forum: Civil Aviation
Topic: Preview 2017 Paris Airshow, Announcements, Expectations, Almost Baseless Rumours
Replies: 143
Views: 29305

Re: Preview 2017 Paris Airshow, Announcements, Expectations, Almost Baseless Rumours

BA will place a top up A380 order so they can get all their customers currently stranded at LHR/LGW to their destinations.

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by kurtverbose
Fri May 26, 2017 2:47 pm
Forum: Civil Aviation
Topic: Why did DL acquire the A350 and A330 Neo?
Replies: 149
Views: 34189

Re: Did Delta Make a Mistake Acquiring the A350 and A330 Neo?

As for some complaints made about the sources I used....try Steven Udvar-Hazy of Air Lease who is without question one of the most respected men in aviation. His company has made big purchases of both the 787-9 and 787-10 as well as the A350. He says point blank (as the seeking alpha link I posted ...

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by kurtverbose
Thu May 25, 2017 10:50 pm
Forum: Civil Aviation
Topic: Smoker who caused onboard fire jailed for 9 years
Replies: 52
Views: 9297

Re: Smoker who caused onboard fire jailed for 9 years

moo wrote:
had his sentence doubled from 4.5 years to 9.5 years


I'm having a maths problem with those numbers.....

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by kurtverbose
Tue May 23, 2017 10:25 pm
Forum: Technical/Operations
Topic: Cirrus SF-50 - Engine & engine location
Replies: 6
Views: 1722

Re: Cirrus SF-50 - Engine & engine location

Funny, the Heinkel HE-162 Salamander was designed to be simple and cheap to build too.

Image

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by kurtverbose
Tue May 23, 2017 10:53 am
Forum: Civil Aviation
Topic: Airbus A330neo production and delivery thread - 2016-2017
Replies: 759
Views: 235071

Re: A330 NEO Production And Delivery Thread Part 1

https://www.flightglobal.com/news/artic ... to-437522/
-->

TAP reporting they expect theirs in the first half of 2018, but it could clip to third quarter.

https://www.flightglobal.com/news/artic ... to-437522/

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by kurtverbose
Thu May 18, 2017 1:58 pm
Forum: Civil Aviation
Topic: Why did the Widebodies 3 holers era end?
Replies: 111
Views: 19363

Re: Why did the Widebodies 3 holers era end?

WHY would an airline choose an aircraft with a 50% higher fuel burn. So there's a linear relationship between fuel burn and number of engines? Many opertators chose the A340 instead of the MD11 - presumably they didn't mind the extra 1/3 higher fuel burn? That has been shown not to be as simple as ...

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by kurtverbose
Thu May 18, 2017 11:01 am
Forum: Civil Aviation
Topic: Why did the Widebodies 3 holers era end?
Replies: 111
Views: 19363

Re: Why did the Widebodies 3 holers era end?

PDX88 wrote:
WHY would an airline choose an aircraft with a 50% higher fuel burn.


So there's a linear relationship between fuel burn and number of engines?

Many opertators chose the A340 instead of the MD11 - presumably they didn't mind the extra 1/3 higher fuel burn?

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by kurtverbose
Wed May 17, 2017 2:14 pm
Forum: Civil Aviation
Topic: Concorde Why no 1st class?
Replies: 145
Views: 27158

Re: Concorde Why no 1st class?

Aviaphile wrote:
Travelling Westbound you arrived before you had left!


Did you have time to come back and wave goodbye to yourself?

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by kurtverbose
Tue May 16, 2017 8:18 pm
Forum: Civil Aviation
Topic: Concorde Why no 1st class?
Replies: 145
Views: 27158

Re: Concorde Why no 1st class?

Do you notice the extra leg room as the plane gets longer when it heats up?

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by kurtverbose
Tue May 16, 2017 7:12 pm
Forum: Civil Aviation
Topic: Concorde Why no 1st class?
Replies: 145
Views: 27158

Re: Concorde Why no 1st class?

So if you're having a conversation at supersonic speed do you have to wait till you slow down before you can hear it?

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by kurtverbose
Mon May 15, 2017 2:31 pm
Forum: Civil Aviation
Topic: Airbus A350 Production And Delivery Thread - 2016-2017 (Part 17)
Replies: 4438
Views: 1520810

Re: A350 Production And Delivery Thread Part 17

Looking at those numbers they still have work to be done. They were aiming for 25% reduction in block fuel per seat, the 77W nominal seat count when making that statement was 365 seats, and the A350-1000 350 seats. I work that out to be 290 kg/seat for the 77W and 224 kg/seat for the A350-1000, mea...

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by kurtverbose
Sat May 13, 2017 3:00 pm
Forum: Civil Aviation
Topic: Airbus A350 Production And Delivery Thread - 2016-2017 (Part 17)
Replies: 4438
Views: 1520810

Re: A350 Production And Delivery Thread Part 17

Some cabin photos of the A350-1000 Early Long Flight: https://twitter.com/Airbus/status/863018187620798466 The high res version of the cockpit photo offers some interesting details- 4 hrs into the flight the aircraft has burnt 33t of fuel, has climbed to fl350, cruising at mach .854 and burning 6.8...

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by kurtverbose
Thu May 11, 2017 9:38 pm
Forum: Civil Aviation
Topic: If Oil drops sub $20 for foreseeable future, a 4-engine A350 stretch?
Replies: 106
Views: 10769

Re: If Oil drops sub $20 for foreseeable future, a 4-engine A350 stretch?

There is a correlation between fuel price and number of engines. Bristol Brabazon, Saunders Roe Princess, even the Dornier DoX - fuel was very cheap. You can bet that if fuel gets cheaper not only will the A350 become 4 engined, but they'll be bolting extra engines onto many aircraft just for the sh...

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by kurtverbose
Thu May 11, 2017 1:31 pm
Forum: Civil Aviation
Topic: Emirates CEO: 115 A380s is ‘absolute’ limit for Dubai hub
Replies: 78
Views: 20868

Re: Emirates CEO: 115 A380s is ‘absolute’ limit for Dubai hub

This A380 115 cap - is there no oportunity to trade 777's with A380's?

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by kurtverbose
Wed May 10, 2017 7:46 am
Forum: Technical/Operations
Topic: Why engine design partnerships?
Replies: 27
Views: 3082

Re: Why engine design partnerships?

Doesn't it actually work out very well for GE as they have the highest profit share of the engine?

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by kurtverbose
Mon May 08, 2017 12:00 pm
Forum: Technical/Operations
Topic: Wheel Loads
Replies: 11
Views: 1104

Re: Wheel Loads

http://www.bbc.co.uk/news/av/uk-england ... -takes-off
:)


Did it have to land somewhere else after that?
-->

speedbored wrote:
For some reason, this thread made me think of this:
http://www.bbc.co.uk/news/av/uk-england ... -takes-off
:)


Did it have to land somewhere else after that?

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by kurtverbose
Sat May 06, 2017 5:58 pm
Forum: Civil Aviation
Topic: UA A320 wheel axle failure @EWR
Replies: 55
Views: 20663

Re: UA A320 wheel axle failure @EWR

If the nose wheel is off the ground, and the tail clearly isn't on the ground how is it balancing?

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by kurtverbose
Fri May 05, 2017 6:09 pm
Forum: Technical/Operations
Topic: Variable Pitch Turbofan Questions
Replies: 16
Views: 2962

Re: Variable Pitch Turbofan Questions

Why don't they just eliminate the fan from the core flow and induct the core air through the hub?

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by kurtverbose
Tue May 02, 2017 9:37 pm
Forum: Civil Aviation
Topic: Should UA Bring 752s Out of Desert
Replies: 88
Views: 19762

Re: Should UA Bring 752s Out of Desert

A.net is really maturing. +30 posts about the 757 and so far no one has suggested Boeing dig out the tooling and restart production.

We should be proud as a forum!

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by kurtverbose
Tue May 02, 2017 3:42 pm
Forum: Technical/Operations
Topic: The A320-200ceo and its Ancient CPU's
Replies: 43
Views: 5428

Re: The A320-200ceo and its Ancient CPU's

zeke wrote:
Software is loaded via a 3.5" floppy drive.


No wonder you have to turn off all your gadgets on a flight - it's because the airlines are jealous of your technology.

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by kurtverbose
Mon May 01, 2017 2:35 pm
Forum: Technical/Operations
Topic: Why engine design partnerships?
Replies: 27
Views: 3082

Re: Why engine design partnerships?

Remebering the RR story, even with almost perfect efficiency of 99% for the gear it is still a huge amount of heat, 100kW-1MW range. Keep in mind how much MW power an engine has. This was the quote , from Professor Ric Parker, director of research and technology at Rolls Royce: - "Our first ge...

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by kurtverbose
Mon May 01, 2017 6:31 am
Forum: Technical/Operations
Topic: Why engine design partnerships?
Replies: 27
Views: 3082

Re: Why engine design partnerships?

Pratt invested how long in figuring out the cooling of the gearbox lightsaber, why is gearbox cooling such an issue? I've also seen quotes from RR engineers say that's a difficult issue. There's a big fan pumping huge amounts of air around the engine, and warming it up a little with a gearbox coole...

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by kurtverbose
Sat Apr 29, 2017 7:07 am
Forum: Civil Aviation
Topic: VIDEO: "Abandoned" NW 727s and 747s
Replies: 35
Views: 8384

Re: VIDEO: "Abandoned" NW 727s and 747s

I can see it in Switzerland...

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by kurtverbose
Fri Apr 28, 2017 1:38 pm
Forum: Civil Aviation
Topic: Airbus A380 MidLife Upgrade, 2021?
Replies: 541
Views: 62254

Re: Airbus A380 MidLife Upgrade, 2021?

Not the 'highly profitable' debate again.....

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