Search found 34 matches

by surrodox2001
Mon Feb 22, 2021 2:26 pm
Forum: Civil Aviation
Topic: PW4000 powered B777 Fleet Groundings
Replies: 90
Views: 15393

Re: PW4000 powered B777 Fleet Groundings

wrt to PW4K on 777s, they're pushing the limits of the core anyway (i heard that they're smaller than a JT9), so eventually this things is gonna happen sometime.

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by surrodox2001
Mon Jan 11, 2021 1:05 pm
Forum: Technical/Operations
Topic: 777-9 back to a grey cockpit ?
Replies: 17
Views: 5295

Re: 777-9 back to a grey cockpit ?

I think they found out that the blueish grey is better for concentration and reflects less light in the night. Something like that. There was an article about this when the 787s cockpit was presented for the first time. Personally I also favoured the brown colour Boeing used for their models launch...

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by surrodox2001
Thu Nov 12, 2020 5:11 am
Forum: Technical/Operations
Topic: What is the last airliner produced with cable hydraulics instead of FBW?
Replies: 4
Views: 1774

Re: What is the last airliner produced with cable hydraulics instead of FBW?

If you're talking about last cable control widebody designed, it'd be the 767 (albeit the spoilers is FBW), I'd think something along the lines of DC10/L1011/A300 for the last pure cable widebody.

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by surrodox2001
Thu Oct 15, 2020 8:22 am
Forum: Travel, Polls & Preferences
Topic: Bigger effect: 9/11 or COVID-19
Replies: 27
Views: 2602

Re: Bigger effect: 9/11 or COVID-19

9/11 ended the 747SP era. Coronavirus is ending the 747-400 era. The 744 (and quadjet era in general) was already on its way out. Coronavirus was just the final nail in the coffin (unless we're talking about cargo). List off the top of my head of pax types that were ended or made endangered species...

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by surrodox2001
Thu Oct 15, 2020 8:17 am
Forum: Technical/Operations
Topic: Why did Boeing go from 5 screens to 4 screens in new designs?
Replies: 18
Views: 2828

Re: Why did Boeing go from 5 screens to 4 screens in new designs?

It’s a fifth screen on the forward pedestal. And, yes, can be used in reversion to replace either MFD. Fifth. I mean fifth... Why did I write third? :? Perhaps you don't sleep well? Btw, the idea of merging 2 screens into one has an another use as to "widen" the cockpit view, as the scree...

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by surrodox2001
Thu Oct 01, 2020 1:57 pm
Forum: Technical/Operations
Topic: Should Boeing and Airbus go for twin wheel main landing gears on their next-gen 737/A320s?
Replies: 11
Views: 3029

Should Boeing and Airbus go for twin wheel main landing gears on their next-gen 737/A320s?

We all know that Boeing and Airbus still uses one wheeled main landing gear on their small narrowbodies (sans Indian Airlines A320 twin wheel oddity), even with the heaviest variants (737 Max 10, A321XLR). So, in retrospect or right now, should they consider upgrading one wheel MLG to two in their n...

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by surrodox2001
Thu Sep 24, 2020 11:38 am
Forum: Technical/Operations
Topic: Why didn't the 737-100/200 and DC-9 need a flight engineer when most airliners of the era needed one?
Replies: 36
Views: 4722

Re: Why didn't the 737-100/200 and DC-9 need a flight engineer when most airliners of the era needed one?

Actually the first jetliner without f/e is the BAC 111, and perhaps the 737 and DC9 just extend on top of that.

British airliners are truly a pioneer!

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by surrodox2001
Tue Sep 15, 2020 1:49 pm
Forum: Travel, Polls & Preferences
Topic: Will Boeing use the "Max" name again?
Replies: 43
Views: 4988

Re: Will Boeing use the "Max" name again?

Wait until they make the -SP a twin, add raked wingtips as aero tweaks and presto -- 747MAX :!: :bigthumbsup: https://1.bp.blogspot.com/-kSoSdbZ9Enc/UtSBLW7rYpI/AAAAAAAAEXY/SeCXUUjpGNM/s1600/747SP+Rollout+v2.png https://1.bp.blogspot.com/-kSoSdbZ9Enc/UtSBLW7rYpI/AAAAAAAAEXY/SeCXUUjpGNM/s1600/747SP+...

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by surrodox2001
Thu Aug 27, 2020 2:48 pm
Forum: Technical/Operations
Topic: Which JT9D variants has options for intake doors?
Replies: 2
Views: 975

Re: Which JT9D variants has options for intake doors?

Also, kinda related.

Does any 747SPs has intake doors installed on their engines?

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by surrodox2001
Thu Aug 27, 2020 2:45 pm
Forum: Technical/Operations
Topic: Which JT9D variants has options for intake doors?
Replies: 2
Views: 975

Which JT9D variants has options for intake doors?

If you look at 747s in the early 70s, you'll see most of them has intake doors on it. And yeah, they were LOUD...as they let all turbomachinary sounds out. But you stop seeing them later into the 70s as airlines upgrade their engines, so I wonder which variants of JT9Ds has options for intake door i...

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by surrodox2001
Fri Aug 21, 2020 12:04 pm
Forum: Technical/Operations
Topic: 747-200F with blended winglets.
Replies: 18
Views: 4274

Re: 747-200F with blended winglets.

If I remember correctly the Aviation partners winglet mod is used in the design of wingleted 767s.

BTW why engine 1 of the plane looks like two-toned in the second picture?

And how a JT9D-70 engine sound?

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by surrodox2001
Fri Aug 21, 2020 11:59 am
Forum: Travel, Polls & Preferences
Topic: Will Boeing use the "Max" name again?
Replies: 43
Views: 4988

Re: Will Boeing use the "Max" name again?

In the older times, the DC10 returned to service from '79 groundings, they still kept the name as usual and the public don't grind about it.

Just some historic context here.

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by surrodox2001
Fri Jul 24, 2020 1:59 pm
Forum: Travel, Polls & Preferences
Topic: Is the A380 the Biggest Failure in Commercial Aviation History?
Replies: 51
Views: 3603

Re: Is the A380 the Biggest Failure in Commercial Aviation History?

To add some other airliner flops, I think the RR variant 767, 707 and DC8, DC10 40 are as not much carriers ordered it apart from the original requester and some other carriers.

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by surrodox2001
Mon Jul 13, 2020 4:01 am
Forum: Travel, Polls & Preferences
Topic: Largest 4 engine aircraft in production after 747/A380?
Replies: 3
Views: 688

Re: Largest 4 engine aircraft in production after 747/A380?

The largest might be the IL-96 if they don't stop production now.

EDIT: UAC has commited to continue IL96 production of few aircraft per year until 2025:
http://www.rusaviainsider.com/uac-announces-il-96-production-targets/

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by surrodox2001
Mon May 04, 2020 10:46 am
Forum: Technical/Operations
Topic: CF6-50 start: what is that sound?
Replies: 13
Views: 2500

Re: CF6-50 start: what is that sound?

Ok, that very clear, thanks. Btw, is it the rotating fan that is producing the so characteristic sound of the CF6-50? Are you thinking about the initial start sequence with the whine? It's all present from CF6-6s all the way up to -80E1s (+LM2500) from the videos I heard. No, it's the high-pitched ...

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by surrodox2001
Mon May 04, 2020 3:01 am
Forum: Technical/Operations
Topic: CF6-50 start: what is that sound?
Replies: 13
Views: 2500

Re: CF6-50 start: what is that sound?

SpaceshipDC10 wrote:
Ok, that very clear, thanks. Btw, is it the rotating fan that is producing the so characteristic sound of the CF6-50?


Are you thinking about the initial start sequence with the whine? It's all present from CF6-6s all the way up to -80E1s (+LM2500) from the videos I heard.

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by surrodox2001
Mon May 04, 2020 2:58 am
Forum: Technical/Operations
Topic: CF6-50 start: what is that sound?
Replies: 13
Views: 2500

Re: CF6-50 start: what is that sound?

The noise "growl" you hear at about the 50 sec mark is the harmonics of the flame front when the fuel is introduced. You can see the condensation from the air starter up until the turbine becomes self sufficient to accelerate rotational speed up to idle and the starter is dropped out. The...

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by surrodox2001
Tue Apr 21, 2020 3:35 pm
Forum: Technical/Operations
Topic: 747-200/300 with GE engines...Why the lower fuel capacity?
Replies: 17
Views: 2491

Re: 747-200/300 with GE engines...Why the lower fuel capacity?

The GE engine is longer than PW, so the turbine safety zone is further back in the wing. Just a guess but that’s a factor in other designs.

What about RR? I think RR, PW's engine is also quite long too in terms of complete engine.

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by surrodox2001
Tue Apr 21, 2020 2:54 pm
Forum: Technical/Operations
Topic: 747-200/300 with GE engines...Why the lower fuel capacity?
Replies: 17
Views: 2491

Re: 747-200/300 with GE engines...Why the lower fuel capacity?

Why we're getting a lower fuel capacity with GE? Slightly off topic, the A320 with IAE engines have a slightly less Wing Tank capacity than the CFM counterparts due to the incorportaion of a Dry Bay inside the the Wing cell around the pylon area for additional safety. This can be a reason, however ...

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by surrodox2001
Tue Apr 21, 2020 2:52 pm
Forum: Technical/Operations
Topic: 747-200/300 with GE engines...Why the lower fuel capacity?
Replies: 17
Views: 2491

Re: 747-200/300 with GE engines...Why the lower fuel capacity?

The mentioned Boeing PDF file contains a lot of errors, so far I was able to check on short notice : - Page 23 : 747-200 engines is completely incorrect - Page 24 : 747-300combi (Air india) powered by CF6-80C2B1 engines has also been produced. IMHO an inaccurate copy/paste PR product, not checked a...

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by surrodox2001
Tue Apr 21, 2020 5:57 am
Forum: Travel, Polls & Preferences
Topic: Rare and Short Lived Airline/Aircraft Combinations
Replies: 101
Views: 11252

Re: Rare and Short Lived Airline/Aircraft Combinations

Air India Landor reject livery:



The Indians protested and they got the Taj Mahal on every window old livery back.

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by surrodox2001
Tue Apr 21, 2020 5:53 am
Forum: Travel, Polls & Preferences
Topic: Rare and Short Lived Airline/Aircraft Combinations
Replies: 101
Views: 11252

Re: Rare and Short Lived Airline/Aircraft Combinations

tmu101 wrote:
Wasn't there a Concorde painted with Singapore Airlines color scheme on one side (some sort of arrangement with British Airways if i recall)?


There you go:

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by surrodox2001
Mon Apr 20, 2020 5:00 pm
Forum: Technical/Operations
Topic: 747-200/300 with GE engines...Why the lower fuel capacity?
Replies: 17
Views: 2491

Re: 747-200/300 with GE engines...Why the lower fuel capacity?

mmo wrote:
And the VTO closed at a slightly earlier point.


What's a VTO?

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by surrodox2001
Mon Apr 20, 2020 9:28 am
Forum: Technical/Operations
Topic: 747-200/300 with GE engines...Why the lower fuel capacity?
Replies: 17
Views: 2491

747-200/300 with GE engines...Why the lower fuel capacity?

I assume we're going to get a lower range with this. According to StartupBoeing's 747 classic PDF , Boeing gives a lower fuel capacity (few hundred gallons) for the GE engines in 747-200/300 compared to PW and RR engines. Why we're getting a lower fuel capacity with GE? I don't think engine weight a...

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by surrodox2001
Thu Apr 16, 2020 12:29 pm
Forum: Travel, Polls & Preferences
Topic: Rare and Short Lived Airline/Aircraft Combinations
Replies: 101
Views: 11252

Re: Rare and Short Lived Airline/Aircraft Combinations

https://www.youtube.com/watch?v=eBm5bD863vs

Lufthansa's (only?) 727 with then-new gray bottom livery.

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by surrodox2001
Thu Apr 16, 2020 12:23 pm
Forum: Travel, Polls & Preferences
Topic: Rare and Short Lived Airline/Aircraft Combinations
Replies: 101
Views: 11252

Re: Rare and Short Lived Airline/Aircraft Combinations

DeltaPSCFlyer wrote:
Delta and the 747-100/200 series in the 70's.


Don't forget that Delta also operated Dc-10s twice, 1st time in the 1970s while waiting for the 1011s, second time when they use bought Western Airlines planes.

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by surrodox2001
Sat Apr 11, 2020 4:24 pm
Forum: Technical/Operations
Topic: 747SP fifth pod ?
Replies: 32
Views: 3608

Re: 747SP fifth pod ?

Don't know there's other airlines operated RR 747SPs. Thanks for your data.
But yeah, AFAIK only Qantas operated 747SPs on commercial routes. (I saw a few Saudia on this list, they use them on commercial flights as well?) (The last one is for VIP use I think.)

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by surrodox2001
Sat Apr 11, 2020 10:58 am
Forum: Technical/Operations
Topic: 747SP fifth pod ?
Replies: 32
Views: 3608

Re: 747SP fifth pod ?

747classic wrote:
I have no knowledge of any airline (or operator) actually performed a 5th pod operation at a RR powered 747SP.


In addition to that, only Qantas operated RR powered 747SPs. (VH-EAA, VH-EAB)

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by surrodox2001
Sat Apr 11, 2020 2:29 am
Forum: Technical/Operations
Topic: 747SP fifth pod ?
Replies: 32
Views: 3608

Re: 747SP fifth pod ?

Then why you need to haul a -3 in a -7 equipped 747sp? Plane recovery?
And I'm pretty sure that sucker-door equipped 747s are Stage 1 or 2 (?) and won't pass noise regulations.

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by surrodox2001
Fri Apr 10, 2020 5:41 pm
Forum: Technical/Operations
Topic: 747SP fifth pod ?
Replies: 32
Views: 3608

Re: 747SP fifth pod ?

Anyone know if this sub type was certified for fifth pod engine ferry and if it was ever done ? Syrian 747SP, YK-AHA, 1999-09-01, MUC, with 5th pod installed : https://www.747sp.com/wp-content/gallery/21174-284/21174_yk-aha_old5engines.jpg See : https://www.747sp.com/747sp-production-list/21174-284...

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by surrodox2001
Fri Apr 10, 2020 11:31 am
Forum: Technical/Operations
Topic: Why did Rolls Royce stop making engines for the 777?
Replies: 10
Views: 3305

Re: Why did Rolls Royce stop making engines for the 777?

FYI: RR did make an engine for the 2nd generation 777s.

It's called Trent 8104 (104000lbs thrust?) and made 110000lbs in testing. Making it close to the GE90-110/115s.
But GE came and take all the money away and airlines only have GE on offer.

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by surrodox2001
Fri Apr 10, 2020 11:20 am
Forum: Technical/Operations
Topic: 747SP fifth pod ?
Replies: 32
Views: 3608

Re: 747SP fifth pod ?

Kinda related, what airline does frequently use 5th pod on the 747?

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by surrodox2001
Fri Apr 10, 2020 11:13 am
Forum: Travel, Polls & Preferences
Topic: Douglas/McDD rollouts, why Bagpipes?
Replies: 2
Views: 520

Douglas/McDD rollouts, why Bagpipes?

From 3:06 in https://www.youtube.com/watch?v=pnYuaU6gsig From 0:30 in https://www.youtube.com/watch?v=pnYuaU6gsig Can anyone here that knows about McDD stuff explains why these (at least) Douglas/McDD rollouts have bagpipe songs on them? I'm pretty sure the founder (Donald Douglas) isn't a Scot eith...

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by surrodox2001
Sat Apr 04, 2020 12:26 pm
Forum: Travel, Polls & Preferences
Topic: The most widely used aero engine?
Replies: 1
Views: 320

The most widely used aero engine?

What's the aero engine (jet, turboprop, piston) that's being used on the most types of aircraft?

I'll imagine the CFM56 or JT3 will be the most widely used jet, and PT6 for turboprop.

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