Search found 425 matches

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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: 6636

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: 191
Views: 42259

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: 2281

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: 8534

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: 2281

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: 191
Views: 42259

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: 20909

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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by 744SPX
Thu Apr 22, 2021 1:09 pm
Forum: Civil Aviation
Topic: Emirates wants talks on 777x
Replies: 28
Views: 7131

Re: Emirates wants talks on 777x

I have to say that I agree with Clark on this. Boeing hasn't said squat on 777X performance and they have been flight testing it for 15 months.

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by 744SPX
Tue Apr 20, 2021 5:04 pm
Forum: Military Aviation & Space Flight
Topic: SpaceX - Tests, Launches, Developments - 2021
Replies: 315
Views: 31596

Re: SpaceX - Tests, Launches, Developments - 2021

Moonship could just eat Orion, like in You Only Live Twice. No need for docking equipment.

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by 744SPX
Mon Apr 19, 2021 11:20 pm
Forum: Civil Aviation
Topic: Boeing CEO's Comments On Their Next Airplane
Replies: 1694
Views: 171222

Re: Boeing CEO's Comments On Their Next Airplane

I wonder how much wider you would have to go than the MC-21's fuselage to do 2-2-2. There may be a sweet spot where it would be viable against a spacious 3-3 like the -21 because of the massive decrease in turnaround times (assuming the fuselage is on the longer side). Using the McDonnel-Douglas DC...

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by 744SPX
Mon Apr 19, 2021 5:30 pm
Forum: Civil Aviation
Topic: Boeing CEO's Comments On Their Next Airplane
Replies: 1694
Views: 171222

Re: Boeing CEO's Comments On Their Next Airplane

I wonder how much wider you would have to go than the MC-21's fuselage to do 2-2-2. There may be a sweet spot where it would be viable against a spacious 3-3 like the -21 because of the massive decrease in turnaround times (assuming the fuselage is on the longer side).

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by 744SPX
Mon Apr 19, 2021 5:22 pm
Forum: Civil Aviation
Topic: Boeing CEO's Comments On Their Next Airplane
Replies: 1694
Views: 171222

Re: Boeing CEO's Comments On Their Next Airplane

2-2-2 all the way baby. Time to put passengers first again.

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by 744SPX
Mon Apr 19, 2021 5:19 pm
Forum: Civil Aviation
Topic: Discussion on Airbus ZeroE Initiative/Carbon-Free Propulsion
Replies: 68
Views: 5176

Re: Discussion on Airbus ZeroE Initiative/Carbon-Free Propulsion

This may have been known - but they are making some big claims about Fusion being viable by 2030. https://ca.finance.yahoo.com/news/nuclear-reactor-just-made-fusion-190100936.html They have to demonstrate sustained break-even first and none of these start-ups have done that yet. ITER's schedule is ...

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by 744SPX
Mon Apr 19, 2021 5:10 pm
Forum: Civil Aviation
Topic: Speculation : Airbus Response to a possible NMA-5
Replies: 151
Views: 20909

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

I don't think a 3-row simple stretch A322 is going to be anywhere near enough. Its got to have the new wing to compete with whatever NMA-5 ends up being. Something in-between A321 and B753 capacity-wise with XLR range.

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by 744SPX
Mon Apr 19, 2021 1:07 pm
Forum: Military Aviation & Space Flight
Topic: Kawasaki C-2: Why CF-6?
Replies: 7
Views: 821

Re: Kawasaki C-2: Why CF-6?

In addition to commonality, with the CF6-80C2K1F at 59,740 lbs thrust, the C-2 already has the highest thrust to weight ratio of any heavy lift aircraft in the world. The GEnx or T1000 would be massive overkill and also a lot heavier.

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by 744SPX
Sat Apr 17, 2021 7:08 pm
Forum: Military Aviation & Space Flight
Topic: Airbus A400M News, Production and Delivery Thread - 2021
Replies: 42
Views: 7338

Re: Airbus A400M News, Production and Delivery Thread - 2021

I'm curious as to what the A400M's top speed is. The flight test review with an AWST pilot said they maintained 480-485mph at only 60-65% power (published high speed cruise). Its got to be easily over 500 at max power. An unmodified P-3 set a 501 mph speed record back in 1970 with its straight wing ...

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by 744SPX
Sat Apr 17, 2021 6:53 pm
Forum: Civil Aviation
Topic: Speculation : Airbus Response to a possible NMA-5
Replies: 151
Views: 20909

Re: Airbus Response to a possible NMA-5

Airbus has been doing R&D on a new 320 wing for a while now. I think if NMA-5 is launched Airbus should (and can) launch a 322 with the new wing and slightly uprated GTF at 37.5k. Also, enough of a stretch (at least 4 rows) to seat 260-270 in all economy. Range of 4500-5000nmi. That's what they ...

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by 744SPX
Thu Apr 15, 2021 10:10 pm
Forum: Military Aviation & Space Flight
Topic: Boeing P-8 Poseidon News, Production and Delivery Thread - 2021
Replies: 99
Views: 11884

Re: Boeing P-8 Poseidon News, Production and Delivery Thread - 2021

Underpowered and under-winged. The only reason for the change to a BS "fast and high" MPA profile was because Boeing was looking for the absolute cheapest way possible to build a maritime patrol aircraft. They took the only aircraft in its inventory that fit the general size requirement, p...

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by 744SPX
Tue Apr 13, 2021 8:01 pm
Forum: Technical/Operations
Topic: Modern Turbofan Engine Efficiency
Replies: 29
Views: 6177

Re: Modern Turbofan Engine Efficiency

Heck, the TF-39 had an 8-to-1 BPR and the CF6-80 is only 5 to1 Interesting. I'm not familiar with a lot of older engines and aircraft, so I didn't know that a BPR 8 turbofan was available in 1964. It makes the advances in turbofan technology since that time seem less impressive. Why did GE have to ...

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by 744SPX
Mon Apr 12, 2021 11:36 pm
Forum: Technical/Operations
Topic: Jet engines in the 2020s and 2030s.
Replies: 4
Views: 1760

Re: Jet engines in the 2020s and 2030s.

Speed can get resolved, if the NASA ATP program is any indicator, (double digit efficiency advantage over equivalent tech turbofan engines up to .9 mach) but noise and safety will require some creativity and may never be satisfactory for everyone. None of the current open rotor designs/proposals use...

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by 744SPX
Mon Apr 12, 2021 5:44 pm
Forum: Technical/Operations
Topic: Jet engines in the 2020s and 2030s.
Replies: 4
Views: 1760

Re: Jet engines in the 2020s and 2030s.

Open Rotor. Ever higher turbofan BPR's are going to come with ever diminishing returns until they hit the point where the cowl drag (and weight) is so massive that further gains of any significance in subsonic engine efficiency can only come from open rotor.

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by 744SPX
Sun Apr 11, 2021 8:56 pm
Forum: Military Aviation & Space Flight
Topic: Drones Of Unknown Origin Swarm US Destroyers At Sea
Replies: 21
Views: 4051

Re: Drones Of Unknown Origin Swarm US Destroyers At Sea

EMP will take down a drone, and Navy ships are hardened.

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by 744SPX
Thu Apr 08, 2021 5:31 am
Forum: Civil Aviation
Topic: Discussion on Airbus ZeroE Initiative/Carbon-Free Propulsion
Replies: 68
Views: 5176

Re: Discussion on Airbus ZeroE Initiative/Carbon-Free Propulsion

Biggest bottleneck for nuclear right now is the NRC (working on it) and nuclear power's public relations issue. Fact of the matter is that nuclear fission is FAR safer per kilowatt hour of energy produced than any fossil fuels and in many cases, renewables as well.

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by 744SPX
Thu Apr 08, 2021 5:23 am
Forum: Civil Aviation
Topic: Discussion on Airbus ZeroE Initiative/Carbon-Free Propulsion
Replies: 68
Views: 5176

Re: Discussion on Airbus ZeroE Initiative/Carbon-Free Propulsion

LWR reactors are very inefficient compared to Gen IV designs, all of which have been tested in one form or another since the early 1950's. LWR's are wasteful of fuel with extremely low burnup and extremely long-lived waste. Fast reactors (and high-temp thermal reactors) are much more efficient, part...

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by 744SPX
Wed Apr 07, 2021 4:55 pm
Forum: Civil Aviation
Topic: Exclusive- Airbus floating concept for A380 combi
Replies: 96
Views: 12661

Re: Exclusive- Airbus floating concept for A380 combi

UA735WL wrote:
Pretty bad April fool's joke. Would really hate to be on the upper deck of this thing with a cargo fire on the main deck sending heat and smoke up and burning through the floor.


Hey, underfloor radiant heat is all the rage these days

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by 744SPX
Wed Apr 07, 2021 5:36 am
Forum: Technical/Operations
Topic: Modern Turbofan Engine Efficiency
Replies: 29
Views: 6177

Re: Modern Turbofan Engine Efficiency

Something else to note: The efficiency of the JT9D was improved by 15% with the PW4000, yet bypass ratio was not increased at all.

Heck, the TF-39 had an 8-to-1 BPR and the CF6-80 is only 5 to1

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by 744SPX
Wed Apr 07, 2021 5:25 am
Forum: Technical/Operations
Topic: Modern Turbofan Engine Efficiency
Replies: 29
Views: 6177

Re: Modern Turbofan Engine Efficiency

The combined-cycle engines have two thermodynamic advantages: 1. As mentioned, the hot exhaust warms up water to power a steam turbine This. There is no rankine bottoming cycle for aviation GT's. I find 55% to be unrealistically high for an aircraft GT without a bottoming cycle, as the bottoming cy...

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by 744SPX
Wed Apr 07, 2021 5:07 am
Forum: Technical/Operations
Topic: Why did Boeing design the 707 to have a shorter landing gear than the DC-8?
Replies: 10
Views: 3813

Re: Why did Boeing design the 707 to have a shorter landing gear than the DC-8?

The 707 gear is still significantly longer than the 737 gear, and it gave enough ground clearance to fit the CFM-56 without having to squish the nacelle and push it into the wing like the 737. Also, the 707 has a deeper lower fuselage than the 737 (or DC-8) which also contributes to its longer gear ...

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by 744SPX
Tue Apr 06, 2021 7:52 pm
Forum: Military Aviation & Space Flight
Topic: Space technology that can help us preserve our environment on Earth
Replies: 19
Views: 1358

Re: Space technology that can help us preserve our environment on Earth

Combine all that space junk with Starlink, and we are well on are way to a reverse Dyson sphere.

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by 744SPX
Tue Apr 06, 2021 1:15 am
Forum: Civil Aviation
Topic: Embraer New Turboprop Aircraft News and Discussion Thread
Replies: 384
Views: 44112

Re: Embraer New Turboprop Aircraft News and Discussion Thread

Hopefully the engine will look like this: Tested to .90 mach and maintained double digit efficiency over equivalent technology turbofans at that speed, 20%+ at .8 mach: https://live.staticflickr.com/8484/8269751637_f7d45acb1c_w.jpg https://lh3.googleusercontent.com/proxy/Ic0dBCUjD4Lvg7F0g9VvtJHIMVUG...

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by 744SPX
Wed Mar 31, 2021 1:51 pm
Forum: Military Aviation & Space Flight
Topic: SpaceX - Tests, Launches, Developments - 2021
Replies: 315
Views: 31596

Re: SpaceX - Tests, Launches, Developments - 2021

You guys are giving up way to easily. The Atlas had literally dozens of explosive failures when it was being developed, and starship is significantly more ambitious. I think Elon is on the right track with the rapid prototyping and rapid testing. Sure, raptor reliability needs to improve, but consid...

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by 744SPX
Tue Mar 30, 2021 2:02 pm
Forum: Civil Aviation
Topic: Boeing CEO's Comments On Their Next Airplane
Replies: 1694
Views: 171222

Re: Boeing CEO's Comments On Their Next Airplane

For this niche, I still think 2-2-2, not 2-3-2 would be the best option.

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by 744SPX
Mon Mar 29, 2021 9:08 pm
Forum: Military Aviation & Space Flight
Topic: Tempest Fighter Jet Programme News and Discussion Thread
Replies: 202
Views: 62694

Re: Tempest Fighter Jet Programme News and Discussion Thread

Reaction engines tech? I hadn't heard that. Mach 5 capability would definitely be a unique selling point.

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by 744SPX
Tue Mar 23, 2021 2:29 am
Forum: Civil Aviation
Topic: Embraer New Turboprop Aircraft News and Discussion Thread
Replies: 384
Views: 44112

Re: Embraer New Turboprop Aircraft News and Discussion Thread

also, i cant see a reason for such big wing fairing MLG can be placed behind engines like in old planes or Dash8. not so big Mach for area rule is there proof its a real emb proposal? All modern aircraft have these huge center wing boxes, from bizjets to widebody airliners. That's likely why a cent...

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by 744SPX
Mon Mar 22, 2021 1:27 pm
Forum: Military Aviation & Space Flight
Topic: Germany Future MPA Aircraft News and Discussion Thread
Replies: 145
Views: 13607

Re: Germany Future MPA Aircraft News and Discussion Thread

France confirmed today that they are offering Germany to lease 4 ATL2 ASW/MPA from them until MAWS is operational. This is to prevent the purchase of 5 P-8A from the US and to increase German-Franco cooperation. https://www.meretmarine.com/fr/content/la-france-propose-de-preter-quatre-atlantique-2-...

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by 744SPX
Wed Mar 17, 2021 2:56 pm
Forum: Civil Aviation
Topic: Boeing 747 Production/Delivery Thread - 2021
Replies: 102
Views: 29455

Re: Boeing 747 Production/Delivery Thread - 2021

Does that then bring the total number of 748's built and delivered to 156 at line closure? I am almost sure it will be 155; LN 1420 to 1574. 1563 is the highest delivered 747. There will follow 7 for UPS and 4 for Atlas, so 11 more new ones to be delivered. That would make the last 20 shipsets from...

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by 744SPX
Tue Mar 16, 2021 1:57 pm
Forum: Civil Aviation
Topic: Boeing 747 Production/Delivery Thread - 2021
Replies: 102
Views: 29455

Re: Boeing 747 Production/Delivery Thread - 2021

Does that then bring the total number of 748's built and delivered to 156 at line closure?

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by 744SPX
Tue Mar 16, 2021 1:29 am
Forum: Military Aviation & Space Flight
Topic: USAF F-15EX News and Discussion Thread
Replies: 1016
Views: 160657

Re: USAF F-15EX News and Discussion Thread

Is the USAF going to be flying the EX around with an empty rear seat, or will they be removing that to save some weight? My personal preference was for the single seat version as its lighter and has a more aerodynamic canopy (and looks better IMHO) but alas, in the name of economies of scale that h...

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by 744SPX
Tue Mar 16, 2021 1:22 am
Forum: Military Aviation & Space Flight
Topic: F18 question
Replies: 7
Views: 1518

Re: F18 question

The Northrop F-18L was designed specifically for land basing and deleted the folding wings, redesigned the landing gear, and several thousand pounds of weight. Empty weight was the same as a Block 50 F-16. It used more powerful 18,000 lb thrust F404's. It was cleared for maneuvering at 9g and could ...

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by 744SPX
Tue Mar 16, 2021 1:07 am
Forum: Military Aviation & Space Flight
Topic: Tempest Fighter Jet Programme News and Discussion Thread
Replies: 202
Views: 62694

Re: Tempest Fighter Jet Programme News and Discussion Thread

Sunday Times expects F-35 procurement to be cut in favour of Tempest https://ukdefencejournal.org.uk/uk-reportedly-to-cut-f-35b-order-by-65-percent/ Sunday Times article is behind a paywall but details of the review should be made public 16th March. If the UK does not proceed with procuring more th...

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by 744SPX
Tue Mar 16, 2021 1:01 am
Forum: Civil Aviation
Topic: 737, shrinked 707?
Replies: 32
Views: 7142

Re: 737, shrinked 707?

UA735WL wrote:

Honestly I don't know why Boeing didn't choose the 707 platform over the 737 as the one to redesign endlessly


You read my mind :bigthumbsup:

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by 744SPX
Mon Mar 15, 2021 5:24 am
Forum: Military Aviation & Space Flight
Topic: USAF F-15EX News and Discussion Thread
Replies: 1016
Views: 160657

Re: USAF F-15EX News and Discussion Thread

Newark727 wrote:
They won't call it the F-15F because that would make too much sense.


How true.

They seem to feel the need these days to hype things up more than they used to, as with the "MAX" nomenclature.

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by 744SPX
Mon Mar 15, 2021 5:17 am
Forum: Civil Aviation
Topic: 737, shrinked 707?
Replies: 32
Views: 7142

Re: 737, shrinked 707?

DL mech is right.
The 737 and 707 have almost nothing in common except for the fuselage diameter. The 707 can also mount CFM-56's without having to squash the nacelles or push them up into the wing, and its main gear actually has doors that cover them when they retract.

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by 744SPX
Fri Mar 12, 2021 1:20 am
Forum: Military Aviation & Space Flight
Topic: Second tier advanced fighter projects news and discussion
Replies: 191
Views: 42259

Re: Second tier advanced fighter projects news and discussion

Why would they detune it? Most aircraft powered by the F414 need more power. Increased engine service life for starters. I agree that's never a bad thing, but contemporary western fighter engines already have far longer service lives than Russian or Chinese engines. I think its time they start focu...

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by 744SPX
Fri Mar 12, 2021 1:15 am
Forum: Military Aviation & Space Flight
Topic: Second tier advanced fighter projects news and discussion
Replies: 191
Views: 42259

Re: Second tier advanced fighter projects news and discussion

Why would they detune it? Most aircraft powered by the F414 need more power. Air intakes would need to be changed to allow greater mass flow for a more powerful engine, wouldn't they, if an engine were installed that provided significantly more thrust than the F414 - 110kN versus 98kN? Also, think ...

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by 744SPX
Fri Mar 12, 2021 1:10 am
Forum: Civil Aviation
Topic: Embraer New Turboprop Aircraft News and Discussion Thread
Replies: 384
Views: 44112

Re: Updated: Embraer releases first rendering of its new turboprop

The technology is readily available to enable a turboprop powered E2 fuselage to cruise at 485+ mph with double digit efficiency over GTF. At this stage, this is unsubstantiated claim, but I would be ready to accept any evidence you could share. And if true, if such a magic product could exist, it ...

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by 744SPX
Thu Mar 11, 2021 1:46 am
Forum: Military Aviation & Space Flight
Topic: Second tier advanced fighter projects news and discussion
Replies: 191
Views: 42259

Re: Second tier advanced fighter projects news and discussion

Why would they detune it? Most aircraft powered by the F414 need more power.

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by 744SPX
Tue Mar 09, 2021 10:27 pm
Forum: Civil Aviation
Topic: Embraer New Turboprop Aircraft News and Discussion Thread
Replies: 384
Views: 44112

Re: Updated: Embraer releases first rendering of its new turboprop

The technology is readily available to enable a turboprop powered E2 fuselage to cruise at 485+ mph with double digit efficiency over GTF. This is a CASM winner on paper. The fundamental issue is public perception of turboprops, but its going to have to be dealt with sooner or later as open rotor is...

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