Search found 467 matches

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by 744SPX
Thu Jun 17, 2021 5:46 pm
Forum: Technical/Operations
Topic: Is the UDF Engine Back from the Dead?
Replies: 22
Views: 3542

Re: Is the UDF Engine Back from the Dead?

Can somebody explain the difference between turboprop and UDF please? They appear to have different configuration, but I have no idea the advantages of UDF over turboprop. It's a fairly hazy line, but a fan involves a "greater" number of blades, while a prop involves "lesser" nu...

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by 744SPX
Wed Jun 16, 2021 1:14 pm
Forum: Military Aviation & Space Flight
Topic: Chinese Y-20 transport finally flies with upgraded engines
Replies: 7
Views: 730

Re: Chinese Y-20 transport finally flies with upgraded engines

Finally. I was beginning to think the Y-20 was never going to get the new engines.

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by 744SPX
Mon Jun 14, 2021 8:16 pm
Forum: Military Aviation & Space Flight
Topic: Revisiting Super Hornet versus F14
Replies: 15
Views: 1793

Re: Revisiting Super Hornet versus F14

Just like the F-111, you are carrying extra weight of the swing wing mechanism just to attain the supersonic efficiency that you rarely need. All the extra weight would better go into more fuel and payload. bt Which is why a swing wing makes more sense for an aircraft that will be spending a larger...

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by 744SPX
Mon Jun 14, 2021 8:09 pm
Forum: Civil Aviation
Topic: Steven Udvar-Hazy: 737 needs replacement
Replies: 144
Views: 14986

Re: Steven Udvar-Hazy: 737 needs replacement

Here are some economic realities. The fact that the 737 continues to sell in large numbers means that it fulfills the needs of many customers, and Boeing is making money building them. The fact that the basic design is over 50 years old is completely irrelevant. The fact that the A320 is newer and ...

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by 744SPX
Mon Jun 14, 2021 8:04 pm
Forum: Civil Aviation
Topic: Airbus focus is on evolving existing jet models, CEO says
Replies: 129
Views: 17311

Re: Airbus focus is on evolving existing jet models, CEO says

The stars start to lign up for Airbus future plan, and it seems to take the direction I was speculating about: The 321 will move into the MoM space (XLR/322) becomming their own family with a new wing 2030-2032. The 220 will be stretched and the 320neo will be phased out by proving it uncompetitive...

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by 744SPX
Mon Jun 14, 2021 7:49 pm
Forum: Civil Aviation
Topic: GE, Safran announce new airliner engine for the mid 2030s
Replies: 51
Views: 5696

Re: GE, Safran announce new airliner engine for the mid 2030s

Nice to finally see how this development looks. In recent years I read about the development of these large adjusting stators. Goal is to get the swirl out of the rotor wake, which is of course a waste of energy. The stators add weight & complexity, but way less than a counter rotating fan. And...

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by 744SPX
Mon Jun 14, 2021 7:45 pm
Forum: Civil Aviation
Topic: GE, Safran announce new airliner engine for the mid 2030s
Replies: 51
Views: 5696

Re: GE, Safran announce new airliner engine for the mid 2030s

I see the typical nonsense of listing hoped for efficiency of an engine 15 years in the future against one 20 years older and ignoring some pretty basic disadvantages. I wouldn't say hoped for by any stretch. In fact the numbers are low-balling if anything. NASA's ATP program along with the GE UDF ...

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by 744SPX
Mon Jun 14, 2021 4:54 pm
Forum: Civil Aviation
Topic: GE, Safran announce new airliner engine for the mid 2030s
Replies: 51
Views: 5696

Re: GE, Safran announce new airliner engine for the mid 2030s

I think the elimination of contra-rotating is a big breakthrough. Less mass, less complexity, less opportunity for a rotating assembly to fail. The picture in the thread starter shows the back row of blades are static guide vanes. It also leaves the door open for another engine manufacturer to comp...

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by 744SPX
Mon Jun 14, 2021 1:46 am
Forum: Military Aviation & Space Flight
Topic: Should the USAF order the 747-8F?
Replies: 139
Views: 11309

Re: Should the USAF order the 747-8F?

This thread should have died on the first page. The majority has been off-topic.

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by 744SPX
Thu Jun 10, 2021 11:34 pm
Forum: Military Aviation & Space Flight
Topic: Second tier advanced fighter projects news and discussion
Replies: 206
Views: 46507

Re: Second tier advanced fighter projects news and discussion

Two months after its much-ballyhooed April 9 unveiling, the KF-21 Boramae is being dismantled, raising awkward questions about the true readiness of the prototype of Korea's first indigenously developed fighter jet. :shakehead: Noooo :!: What are they going to use now for the Top Gun sequel...pure ...

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by 744SPX
Thu Jun 10, 2021 11:29 pm
Forum: Military Aviation & Space Flight
Topic: F-35 News and Discussion Thread - 2021
Replies: 65
Views: 10247

Re: F-35 News and Discussion Thread - 2021

Not sure if this has been posted in this thread, but ROK has a concept to build an aircraft carrier equipped with F-35s. https://www.thedrive.com/the-war-zone/41014/south-korea-is-looking-at-building-a-war-bigger-carrier-than-we-thought?fbclid=IwAR2Q7-6I2miI3f9HYlAP0O0QdgsP6Uv0mcqPWG_Prb7UizLRCL5NO...

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by 744SPX
Thu Jun 10, 2021 11:15 pm
Forum: Civil Aviation
Topic: Airbus focus is on evolving existing jet models, CEO says
Replies: 129
Views: 17311

Re: Airbus focus is on evolving existing jet models, CEO says

Nor do a lot of airlines have billons to invest in new fleets, so the decision to delay the next decade is sensible. But Airbus should go ahead with the A220-500 and A322 versions both of which should be done without the huge outlay needed for a new model from scratch. Specifically, an A322 with a ...

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by 744SPX
Thu Jun 10, 2021 11:10 pm
Forum: Civil Aviation
Topic: United Airlines in advanced talks on purchasing 100-150 737MAX
Replies: 259
Views: 44329

Re: United Airlines in advanced talks on purchasing 100-150 737MAX

Everything about this deal sounds great, except for the MAX part. Hope it doesn't come to fruition.

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by 744SPX
Thu Jun 10, 2021 8:20 pm
Forum: Military Aviation & Space Flight
Topic: Will GE’s XA100 adaptive combat engine transform the F35 ?
Replies: 46
Views: 3463

Re: Will GE’s XA100 adaptive combat engine transform the F35 ?

Didn't the SH versus Tomcat demonstrate that no parameter is more over-rated than top speed? Was the M2.44 top speed of the Tomcat ever tactically useful? What really counts are weapons, electronics, radar, networking, and reliability. Actually, the F-14A was capable of mach 2.5; moreso than the F-...

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by 744SPX
Wed Jun 09, 2021 4:23 am
Forum: Civil Aviation
Topic: Boeing offers 777X Freighter to QR. Eyeing Order for 30
Replies: 129
Views: 20355

Re: Boeing offers 777X Freighter to QR. Eyeing Order for 30

To be a true 744F replacement its got to have a payload capacity of at least 112 tons.

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by 744SPX
Tue Jun 08, 2021 7:43 pm
Forum: Technical/Operations
Topic: Is the UDF Engine Back from the Dead?
Replies: 22
Views: 3542

Re: Is the UDF Engine Back from the Dead?

Motors hanging off the horizontal stab make great desktop models. Real planes not so much. Well the An-180 and Clean Sky setup doesn't look as strange as engines embedded in the vertical stabilizer, but ugliness didn't stop their presence on trijet airplanes. This apparently was one of McDonnell Do...

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by 744SPX
Mon Jun 07, 2021 11:30 pm
Forum: Civil Aviation
Topic: Boeing offers 777X Freighter to QR. Eyeing Order for 30
Replies: 129
Views: 20355

Re: Boeing offers 777X Freighter to QR. Eyeing Order for 30

I don't think it can get anywhere near 120 tons if its longer than the -8 passenger version, even if the MTOW is higher than 788k. The -8 passenger version is already basically as long as the 744 so its not volume-limited. A further stretch would be sacrificing payload plus adding more structural we...

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by 744SPX
Fri Jun 04, 2021 7:47 pm
Forum: Military Aviation & Space Flight
Topic: Will GE’s XA100 adaptive combat engine transform the F35 ?
Replies: 46
Views: 3463

Re: Will GE’s XA100 adaptive combat engine transform the F35 ?

The F-35B requires a rather specific design and spec of PTO from the engine for the lift fan. These engines are significantly different in how they are designed where the PTO would be, and it likely has different power available there. I expect that the B will require its own engine upgrade program...

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by 744SPX
Fri Jun 04, 2021 7:34 pm
Forum: Civil Aviation
Topic: Boeing CEO's Comments On Their Next Airplane
Replies: 2141
Views: 222817

Re: Boeing CEO's Comments On Their Next Airplane

JonesNL wrote:
A tight 6 abreast skinnier and lighter than A32x fuselage with smaller container option and optimized wing? 5t OEW advantage over the A321 should be enough to be quite competitive on the market...


No way is it going to be skinnier than the A320 fuselage, at least interior diameter-wise.

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by 744SPX
Thu Jun 03, 2021 4:54 pm
Forum: Military Aviation & Space Flight
Topic: Will GE’s XA100 adaptive combat engine transform the F35 ?
Replies: 46
Views: 3463

Re: Will GE’s XA100 adaptive combat engine transform the F35 ?

The F-35B requires a rather specific design and spec of PTO from the engine for the lift fan. These engines are significantly different in how they are designed where the PTO would be, and it likely has different power available there. I expect that the B will require its own engine upgrade program...

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by 744SPX
Thu Jun 03, 2021 4:41 pm
Forum: Civil Aviation
Topic: United orders supersonic planes from Boom (was: Big United Announcement Coming Up?)
Replies: 455
Views: 59303

Re: Big United Announcement Coming Up?

KFTG wrote:
And if my grandmother had wheels, she'd be a wagon.


Now now Mr. Scott, young minds, fresh ideas

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by 744SPX
Wed Jun 02, 2021 2:05 pm
Forum: Military Aviation & Space Flight
Topic: Will GE’s XA100 adaptive combat engine transform the F35 ?
Replies: 46
Views: 3463

Re: Will GE’s XA100 adaptive combat engine transform the F35 ?

I saw the article as well. Not sure why they are saying 45k as a 10% increase over the F135 (43k) would be 47.3K. Going from 43k to 45k is hardly worth mentioning. That's even less than the planned F135 upgrade. As the F135 was shown years ago to be capable of a 50k rating, the XA100 should most cer...

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by 744SPX
Tue Jun 01, 2021 1:19 pm
Forum: Civil Aviation
Topic: New A330 Wingtips?
Replies: 51
Views: 10669

Re: New A330 Wingtips?

VSMUT wrote:
Wow, those are hideous. Move over 737MAX, there is a new champion of ugly wingtips in town...


Truer words were never spoken.

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by 744SPX
Sun May 30, 2021 10:18 pm
Forum: Technical/Operations
Topic: For Pilots. What is Your Most Enjoyable Commercial Aircraft to Fly?
Replies: 89
Views: 11231

Re: For Pilots. What is Your Most Enjoyable Commercial Aircraft to Fly?

I'd be curious how flying the SAAB-2000 compares with the Q400...

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by 744SPX
Sun May 30, 2021 9:40 pm
Forum: Civil Aviation
Topic: Aerion Supersonic shuts down
Replies: 49
Views: 9290

Re: Aerion Supersonic shuts down

I was never a big fan of Aerion. Way too slow of a cruise speed for the money it will take to build and certify it. Boom has a much better chance with their design, not only with the choice of speed but also passenger capacity. If Boom can succeed, it makes it easier for the next step, which in my o...

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by 744SPX
Sun May 30, 2021 9:31 pm
Forum: Civil Aviation
Topic: Bloomberg: Airbus Backs Lightweight Wing to Preserve Its Lead Over Boeing
Replies: 224
Views: 31600

Re: Bloomberg: Airbus Backs Lightweight Wing to Preserve Its Lead Over Boeing

Polot wrote:
mjoelnir wrote:
seahawk wrote:
I see the wing more as a technology demonstrator than a real product.


That may well be, but it was supposed to reduce weight.

The primary purpose is to increase wing size and area while keeping it about the same weight as the current wing.


Exactly.

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by 744SPX
Sat May 29, 2021 2:20 am
Forum: Civil Aviation
Topic: Is the Boeing 787-8 still pitched by Boeing?
Replies: 43
Views: 8295

Re: Is the Boeing 787-8 still pitched by Boeing?

He said "what if" (...Boeing simply shrinks the -9 to the -8 size and use the same larger wing and landing gear) The next question would than be, why this fascination with uneconomical ultra long haul frames? The 787-8 has plenty range as it is. I was thinking the same thing. 788 is a gre...

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by 744SPX
Fri May 28, 2021 7:52 pm
Forum: Civil Aviation
Topic: Is the Boeing 787-8 still pitched by Boeing?
Replies: 43
Views: 8295

Re: Is the Boeing 787-8 still (seriously) pitched by Boeing?

It is interesting to compare the production longevity and sales of B762-200 series to the B788. When you look at the B762 you will find that the first one was delivered in 1981 (to United) and the last B762(ER) was delivered to Piedmont in 1988. Over that period Boeing delivered a total of 249 B762...

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by 744SPX
Fri May 28, 2021 7:43 pm
Forum: Civil Aviation
Topic: Tim Clark: Emirates will refuse B777X delivery if not per contract
Replies: 298
Views: 36628

Re: Tim Clark: Emirates will refuse B777X delivery if not per contract

According to FR24, the B777-300ER is operating the route, specifically the EP and EQ series. Do these have the 2016 improvements? Ref: https://www.airliners.net/forum/viewtopic.php?t=1444983 I was wondering if they ever instituted that package. Makes me think of project Ozark for the 748i, which th...

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by 744SPX
Thu May 27, 2021 8:35 pm
Forum: Civil Aviation
Topic: Bloomberg: Airbus Backs Lightweight Wing to Preserve Its Lead Over Boeing
Replies: 224
Views: 31600

Re: Bloomberg: Airbus Backs Lightweight Wing to Preserve Its Lead Over Boeing

DocLightning wrote:
mjoelnir wrote:
Airbus has been testing an electric wing on the A320. All hydraulics replace by electric or electro hydraulic actuators. It provides a significant weight reduction.


How does this compare to the existing technology in the 787 wing?


That's a good question.

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by 744SPX
Thu May 27, 2021 4:57 pm
Forum: Civil Aviation
Topic: Bloomberg: Airbus Backs Lightweight Wing to Preserve Its Lead Over Boeing
Replies: 224
Views: 31600

Re: Bloomberg: Airbus Backs Lightweight Wing to Preserve Its Lead Over Boeing

The big business case for a Boeing MOM is the worry that the company will shrink into irrelevance if it does not. The MAX and 777X are/will be only marginally competitive. The 787 is great and likely will outsell the 350, but one great plane is not enough. One of Airbus's advantages is that France ...

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by 744SPX
Tue May 25, 2021 1:49 pm
Forum: Civil Aviation
Topic: Boeing CEO's Comments On Their Next Airplane
Replies: 2141
Views: 222817

Re: Boeing CEO's Comments On Their Next Airplane

I think Boeing can't assume 125-170 seats market segment will be alright. https://leehamnews.com/2021/05/24/boeings-dilemma-in-the-125-170-seat-sector/ A320, A220, E195E2 and C919 will ramp up this decade. 737-7 has 1.1 customers after 10 years on offer. There is risk of a deny & get buried sit...

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by 744SPX
Mon May 24, 2021 1:58 pm
Forum: Civil Aviation
Topic: Bloomberg: Airbus Backs Lightweight Wing to Preserve Its Lead Over Boeing
Replies: 224
Views: 31600

Re: Bloomberg: Airbus Backs Lightweight Wing to Preserve Its Lead Over Boeing

If they go with a new wing, I could see doing a 6-8 row stretch (Keesje's "A323") while maintaining 4700 nmi range with a slight bump in GTF power to 37,500 lbs or so. That would put it squarely in NMA capacity/range territory and would better recoup the investment than a 4 row stretch. (t...

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by 744SPX
Sat May 22, 2021 11:46 pm
Forum: Civil Aviation
Topic: Airbus A321XLR Development Production Testing Thread - 2021
Replies: 100
Views: 20297

Re: Airbus A321XLR Development Production Testing Thread - 2021

Article about the safety concerns raised by Boeing on the vunerability of the new rear tank for outside fire. https://thekaplanianreport.files.wordpress.com/2021/03/airbus-rear-tank-diagram.jpg?w=397&h=518 https://kaplanianreport.com/ The more skilled people that take a look at new aircraft des...

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by 744SPX
Thu May 20, 2021 1:39 am
Forum: Military Aviation & Space Flight
Topic: F-35 News and Discussion Thread - 2021
Replies: 65
Views: 10247

Re: F-35 News and Discussion Thread - 2021

USAF chief of staff’s plan for future fighter fleet does not include F-22s, with the F-35 as the cornerstone of only four different types. https://theaviationgeekclub.com/usaf-will-reduce-its-fighter-inventory-from-seven-fleets-to-four-and-the-f-22-raptor-is-not-on-the-service-short-list-air-force-...

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by 744SPX
Sun May 16, 2021 5:58 pm
Forum: Technical/Operations
Topic: 727-100 Range
Replies: 17
Views: 3025

Re: 727-100 Range

I believe the -200ADV had a significantly higher fuel capacity (`25%) which compensated for the extra structural weight and payload.

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by 744SPX
Sun May 16, 2021 5:53 pm
Forum: Civil Aviation
Topic: Boeing CEO's Comments On Their Next Airplane
Replies: 2141
Views: 222817

Re: Boeing CEO's Comments On Their Next Airplane

I'm not a fan of 7 abreast (767 excepted) as they will either make it super tight or wide enough to fit super tight 8 abreast. If they are going to cram using narrow seat widths (and of course they will), then the best solution is 2-2-2. Everyone either gets an aisle or a window.

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by 744SPX
Fri May 14, 2021 5:05 pm
Forum: Civil Aviation
Topic: Boeing CEO's Comments On Their Next Airplane
Replies: 2141
Views: 222817

Re: Boeing CEO's Comments On Their Next Airplane

Another reason why 7AB makes no sense for NMA.

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by 744SPX
Fri May 14, 2021 2:26 pm
Forum: Military Aviation & Space Flight
Topic: F-15X has no mission!
Replies: 173
Views: 14847

Re: F-15X has no mission!

And work as a small bomber. https://www.flightglobal.com/fixed-wing/us-air-force-shows-f-15e-loaded-with-five-stealthy-jassms/143713.article bt Would its mission profile also include the Loyal Wingman drone on the hardpoints under the wing? In addition, the JASSM at the rear just looks weird. Would...

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by 744SPX
Fri May 14, 2021 1:05 am
Forum: Civil Aviation
Topic: Boeing CEO's Comments On Their Next Airplane
Replies: 2141
Views: 222817

Re: Boeing CEO's Comments On Their Next Airplane

Perfect opportunity for Airbus to launch a re-winged A322 using slightly uprated versions of the GTF and LEAP-X...

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by 744SPX
Wed May 05, 2021 1:14 pm
Forum: Civil Aviation
Topic: Baby born on SLC-HNL by mother who didn't know she was pregnant
Replies: 53
Views: 7208

Re: Baby born on SLC-HNL by mother who didn't know she was pregnant

Vicenza wrote:
mxaxai wrote:
How do you end up 7 months pregnant without noticing?


It is very possible indeed and, whilst not very common, it is not rare either.


They even had a reality show on the subject a few years back.

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by 744SPX
Tue May 04, 2021 7:33 pm
Forum: Military Aviation & Space Flight
Topic: Second tier advanced fighter projects news and discussion
Replies: 206
Views: 46507

Re: Second tier advanced fighter projects news and discussion

aumaverick wrote:
744SPX wrote:
Taiwan developing new fighter.

Similar wing and tail design to the YF-23. That design is just too good to be relegated to the dustbin of history.


Got a source?


Just an observation.

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by 744SPX
Tue Apr 27, 2021 7:48 pm
Forum: Technical/Operations
Topic: boeing 747 400X, the 400 under a different name or something else?
Replies: 10
Views: 2934

Re: boeing 747 400X, the 400 under a different name or something else?

Love those early "iterations" of the Sonic Cruiser. Utilizing the work done with the NASA TF-8 supercritical wing aircraft.

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by 744SPX
Tue Apr 27, 2021 2:18 pm
Forum: Civil Aviation
Topic: Significant fisticuffs at D-12 at MIA on 2021-04-25
Replies: 40
Views: 8790

Re: Significant fisticuffs at D-12 at MIA on 2021-04-25

Looks more like a travelling troupe of actors putting on a spontaneous performance for the benefit of those sitting in the terminal

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-->

ThePointblank wrote:
Blue Origin is protesting the award of the contract to SpaceX for the Human Landing System competition:

https://spacenews.com/blue-origin-prote ... tem-award/

Something tells me they won't succeed...



Agreed.

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by 744SPX
Tue Apr 27, 2021 12:44 am
Forum: Technical/Operations
Topic: boeing 747 400X, the 400 under a different name or something else?
Replies: 10
Views: 2934

Re: boeing 747 400X, the 400 under a different name or something else?

Good answer VSMUT. You must have the same Boeing book I do. I never understood the 700X with the wider fuselage (and new wing). At that point its a completely new aircraft. (the renders looked pretty ugly too) The best 747X proposal was the 2000 version (747X and 747X stretch) with Trent 600 engines...

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by 744SPX
Mon Apr 26, 2021 8:17 pm
Forum: Military Aviation & Space Flight
Topic: Second tier advanced fighter projects news and discussion
Replies: 206
Views: 46507

Re: Second tier advanced fighter projects news and discussion

Taiwan developing new fighter.

Similar wing and tail design to the YF-23. That design is just too good to be relegated to the dustbin of history.

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by 744SPX
Thu Apr 22, 2021 1:18 pm
Forum: Civil Aviation
Topic: Speculation : Airbus Response to a possible NMA-5
Replies: 151
Views: 21858

Re: Speculation : Airbus Response to a possible NMA-5

AFAIK there are already sunk costs in a new A320 wing- they have been working on it for at least 3 years (I think).

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