Search found 2595 matches

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by mxaxai
Wed Jun 23, 2021 10:48 pm
Forum: Military Aviation & Space Flight
Topic: Chinese Y-20 transport finally flies with upgraded engines
Replies: 10
Views: 1010

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

The aircraft on the right is still made by Ilyushin (a Russian company), not Antonov (a Ukrainian company), and its engines are built by Aviadvigatel in Russia.

I fail to see any similarity between the Il-76 and the Y-20 except that both are four-engined high wing airlifters.

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by mxaxai
Wed Jun 23, 2021 9:47 pm
Forum: Military Aviation & Space Flight
Topic: Hubble - Payload Computer Problem
Replies: 8
Views: 689

Re: Hubble - Payload Computer Problem

NGRST is in the FY2022 proposal, though it isn't a 100% replacement for Hubble. Hubble can observe the full visible spectrum and some UV while NGRST is limited to approx. 480 nm, which excludes blue, violet and UV light. NASA once again wants to axe SOFIA, though. I disagree with NASA's assessment t...

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by mxaxai
Wed Jun 23, 2021 4:34 pm
Forum: Military Aviation & Space Flight
Topic: Germany Future MPA Aircraft News and Discussion Thread
Replies: 217
Views: 20331

Re: Germany Future MPA Aircraft News and Discussion Thread

The parliamentary vote is a pure formality at this point. The commitee's vote is sufficient for the government to sign the necessary contracts.

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by mxaxai
Wed Jun 23, 2021 11:33 am
Forum: Military Aviation & Space Flight
Topic: Hubble - Payload Computer Problem
Replies: 8
Views: 689

Re: Hubble - Payload Computer Problem

NASA appears confident that the backup computer can take over but are currently running diagnostics on the primary computer to understand what exactly went wrong. If Hubble is indeed lost entirely, it would be easier to build a replacement than to launch a repair mission. Unlike in the past when a d...

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by mxaxai
Tue Jun 22, 2021 10:39 pm
Forum: Military Aviation & Space Flight
Topic: Stealth is very important
Replies: 47
Views: 2015

Re: Stealth is very important

Neither Turkey nor the US are officially permitted to enter Syrian airspace, though there appears to be some understanding to avoid direct confrontations as long as US / Turkish attacks are directed against rebels. This requires that both sides can see each other. If the US fully embraced stealth in...

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by mxaxai
Tue Jun 22, 2021 9:53 am
Forum: Military Aviation & Space Flight
Topic: Stealth is very important
Replies: 47
Views: 2015

Re: Stealth is very important

Let’s suppose your India. Your main worry the politicians say is China. You can afford either 100 F-35s or 80 F-35s and 80 Jaguars with targeting pods. Which do you pick? I would probably choose 30 F-35s, 100 F-16s and 200 UAVs. Light attack aircraft cannot perform missions with any risk of enemy a...

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by mxaxai
Mon Jun 21, 2021 9:12 pm
Forum: Military Aviation & Space Flight
Topic: Stealth is very important
Replies: 47
Views: 2015

Re: Stealth is very important

Let’s suppose your India. Your main worry the politicians say is China. You can afford either 100 F-35s or 80 F-35s and 80 Jaguars with targeting pods. Which do you pick? I would probably choose 30 F-35s, 100 F-16s and 200 UAVs. Light attack aircraft cannot perform missions with any risk of enemy a...

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by mxaxai
Mon Jun 21, 2021 8:40 pm
Forum: Military Aviation & Space Flight
Topic: Stealth is very important
Replies: 47
Views: 2015

Re: Stealth is very important

Suppose your India looking at China. Or Pakistan looking at India. Either way your air force probably should spend its entire budget on those fighters needed to combat the larger enemy. Don’t spend money on cheap ground attack aircraft when you cannot get air superiority. For these nations, would y...

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by mxaxai
Mon Jun 21, 2021 11:42 am
Forum: Military Aviation & Space Flight
Topic: Stealth is very important
Replies: 47
Views: 2015

Re: Stealth is very important

All of them are true simultaneously. #1 and #3: Many missions simply don't need stealth or get little benefit from it. Others do. For a cost-effective force, the right mix of stealth and non-stealth assets must be found. #2: Improvements in sensor technology will reduce the advantage of (current) st...

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by mxaxai
Sun Jun 20, 2021 9:54 pm
Forum: Military Aviation & Space Flight
Topic: New Chinese Tiangong Space Station
Replies: 28
Views: 3452

Re: New Chinese Tiangong Space Station

ESA is already doing joint stuff with China on space. It wouldn't be much of a step for them to send people to a Chinese station once it's properly operational. True, although ESA is very much at the mercy of its member states. If one of them wakes up one day and decides that the friendship with Ch...

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by mxaxai
Sun Jun 20, 2021 9:42 pm
Forum: Civil Aviation
Topic: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS
Replies: 254
Views: 20999

Re: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS

Safety and cost are weighed against each other for each new aircraft. Even outside of aviation, it's a tradeoff we make every day. Why do most FBW aircraft have triple-redundant computers and not two or four - even though there are some that have four? Why is a single set of landing gear enough, or ...

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by mxaxai
Sun Jun 20, 2021 2:07 pm
Forum: Military Aviation & Space Flight
Topic: New Chinese Tiangong Space Station
Replies: 28
Views: 3452

Re: New Chinese Tiangong Space Station

It's a real shame they have not been allowed to participate in the ISS. I hope JAXA, ESA, and Roscosmos are able to cooperate with them well. :) I'm not sure how much cooperation with JAXA and ESA we can expect, though ESA is the more likely of the two. What I do expect are cooperations with smalle...

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by mxaxai
Sat Jun 19, 2021 9:52 pm
Forum: Civil Aviation
Topic: Lufthansa Group Fleet Thread - 2021
Replies: 207
Views: 48522

Re: Lufthansa Group Fleet Thread - 2021

That is a lot of metal for sale. Are there any potential takers out there? I assume the Iranian operators - Mahan Air to be precise - might be interested, if only for spare parts. Other than that, the A346 is virtually retired. European Cargo is using a few for cargo-only flights and there are two ...

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by mxaxai
Sat Jun 19, 2021 12:25 pm
Forum: Technical/Operations
Topic: Synthetic aviation fuels - the future for environmentally friendly aviation?
Replies: 10
Views: 993

Re: Synthetic aviation fuels - the future for environmentally friendly aviation?

Especially from seagoing cargo and agriculture. These two contribute far more than aviation ever can or will. Agriculture is definitely a big contributor, though many people find it easier to avoid air travel than to eat less (or no) meat. In absolute numbers, ships are a big contributor too but pe...

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by mxaxai
Sat Jun 19, 2021 12:04 pm
Forum: Technical/Operations
Topic: Can a B777LR take off at MTOW from a wet 2,7km rwy?
Replies: 12
Views: 1596

Re: Can a B777LR take off at MTOW from a wet 2,7km rwy?

Takeoff runway length requirements are calculated with the assumption that one engine fails. So the runway must be long enough to either stop within the remaining distance or continue the takeoff with only one engine. Stopping is usually possible only up to a certain speed, called V1. If there's win...

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by mxaxai
Sat Jun 19, 2021 11:44 am
Forum: Military Aviation & Space Flight
Topic: Another Boeing-Airbus tanker war is coming soon, KC-Y
Replies: 55
Views: 3954

Re: Another Boeing-Airbus tanker war is coming soon, KC-Y

I doubt that Boeing will be able to compete on cost with a 787 derivative when they have the KC-46A available. With the 787 moving entirely to CHS, the line doesn't have that much excess capacity either. It would also be as difficult to integrate for USAF as the A330, with different engines, a diffe...

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by mxaxai
Sat Jun 19, 2021 10:40 am
Forum: Civil Aviation
Topic: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS
Replies: 254
Views: 20999

Re: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS

Every time with 2 crew when a pilot goes to use the lavatory, it turns the aircraft into a one-pilot operation.. In that case we would still have two crew on the flight deck, one of the cabin crew comes up and straps in. That would still be an option for this proposed single-pilot operation, I supp...

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by mxaxai
Fri Jun 18, 2021 7:41 pm
Forum: Technical/Operations
Topic: Synthetic aviation fuels - the future for environmentally friendly aviation?
Replies: 10
Views: 993

Synthetic aviation fuels - the future for environmentally friendly aviation?

At an aviation conference today, German chancellor Angela Merkel pushed for rapid change towards renewable energy in aviation. Airlines must move ″rapidly″ to using renewable energies, German Chancellor Angela Merkel told a national aviation conference at Berlin airport on Friday. Merkel cited synth...

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by mxaxai
Fri Jun 18, 2021 2:32 pm
Forum: Civil Aviation
Topic: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS
Replies: 254
Views: 20999

Re: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS

And the computer has no issues giving full control to the pilots and making them deal with it if it does not trust it’s data or the aircraft is not behaving as expected. Though past incidents would suggest that this sudden handover can be quite disastrous if the pilots aren't prepared for it. Regar...

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by mxaxai
Fri Jun 18, 2021 12:48 pm
Forum: Civil Aviation
Topic: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS
Replies: 254
Views: 20999

Re: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS

Ok, in watching the Air Disasters on the Smithsonian channel, we had the Geman Wings and a carrier in Africa where the second pilot was locked out of the cockpit, would these a/c be equipped with an override mechanism from outside or the removal of the deadbolt feature from inside the cockpit ensur...

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by mxaxai
Fri Jun 18, 2021 12:13 pm
Forum: Civil Aviation
Topic: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS
Replies: 254
Views: 20999

Re: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS

I agree that true single-pilot ops are not safe enough (yet). Single-pilot cruise, on the other hand, seems achievable. Achievable...of course - wise in terms of risk management? Perhaps not. That's the point of debate. I meant, of course, achievable and certifiable with the same level of risk that...

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by mxaxai
Fri Jun 18, 2021 12:12 pm
Forum: Military Aviation & Space Flight
Topic: The emerging space technology
Replies: 9
Views: 664

Re: The emerging space technology

Cheaper robust microchips. You can't build cheap microsatellites when (radiation-tolerant) chips are ridiculously expensive or, worse, out of stock. https://spacenews.com/satellite-makers-are-getting-to-grips-with-component-shortages/ The current chip shortage will not last forever and it affects e...

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by mxaxai
Fri Jun 18, 2021 11:50 am
Forum: Civil Aviation
Topic: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS
Replies: 254
Views: 20999

Re: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS

The ATSB did a 5 year study and found the incapacitation rate was 1 in every 32000 departures (https://www.atsb.gov.au/media/5768970/ar-2015-096-final.pdf), with close to 40 million departures per year pre covid (https://www.icao.int/annual-report-2019/Pages/the-world-of-air-transport-in-2019.aspx)...

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by mxaxai
Fri Jun 18, 2021 10:29 am
Forum: Military Aviation & Space Flight
Topic: Airbus A400M News, Production and Delivery Thread - 2021
Replies: 53
Views: 9960

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

AKKA Technologies is now offering a quick-change solution for the A400M to be used as fire fighting aircraft with a capability of 20 tons. https://www.journal-aviation.com/en/news/46135-the-airbus-a400m-soon-to-be-used-as-a-firefighting-aircraft I think that´s a capability which is quite interestin...

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by mxaxai
Fri Jun 18, 2021 10:21 am
Forum: Civil Aviation
Topic: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS
Replies: 254
Views: 20999

Re: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS

Pilot incapacitations are actually fairly frequent, the statistics show the majority of them occur due to food or drink consumed, next highest area is laser attacks. Depends on your definition of frequent, I suppose. The highest numbers I can find state that up to 4% of pilots experience medical is...

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by mxaxai
Thu Jun 17, 2021 4:04 pm
Forum: Civil Aviation
Topic: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS
Replies: 254
Views: 20999

Re: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS

Noshow wrote:
What would a computer have done better with no more speed data because of iced up pitots?

The same that the pilots should have done: Realize that the speed data is garbage and use other methods like 'pitch and power' to stay in a safe configuration.

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by mxaxai
Thu Jun 17, 2021 12:07 pm
Forum: Civil Aviation
Topic: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS
Replies: 254
Views: 20999

Re: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS

Suppose you have a repeat of Qantas 32 after the pilot croaks. Then what. Then it may lead to a crash. Pilot incapacitations happen but are relatively rare, on the order of 1e-6 per flight hour. Uncontained engine failures are similarly uncommon. For ETOPS beyond 180 minutes, an IFSD rate of less t...

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by mxaxai
Thu Jun 17, 2021 11:51 am
Forum: Military Aviation & Space Flight
Topic: Another Boeing-Airbus tanker war is coming soon, KC-Y
Replies: 55
Views: 3954

Re: Another Boeing-Airbus tanker war is coming soon, KC-Y

Since this is intended as a KC-135 replacement, and given that the USAF will have a sizable KC-46 fleet anyway, I fully expect them to simply buy more - perhaps slightly improved - KC-46.

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by mxaxai
Thu Jun 17, 2021 9:59 am
Forum: Military Aviation & Space Flight
Topic: The emerging space technology
Replies: 9
Views: 664

Re: The emerging space technology

https://spacenews.com/satellite-makers- ... shortages/
-->

Cheaper robust microchips. You can't build cheap microsatellites when (radiation-tolerant) chips are ridiculously expensive or, worse, out of stock. https://spacenews.com/satellite-makers- ... shortages/

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by mxaxai
Thu Jun 17, 2021 8:43 am
Forum: Civil Aviation
Topic: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS
Replies: 254
Views: 20999

Re: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS

And a factor that is quite important and a contributor to WH&S and wellbeing. Just having the presence of a colleague to converse with at work. Long haul flying can be an incredibly lonely job with can adversely affect mental health, no need to make it more lonely. Also long haul back of the cl...

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by mxaxai
Wed Jun 16, 2021 6:41 pm
Forum: Civil Aviation
Topic: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS
Replies: 254
Views: 20999

Re: CX Working With Airbus on Single-Pilot System for A350 With 2025 E

The issue though is what happens when there’s a failure or any abnormal situation. At this stage even the most advanced aircraft still requires at least an aviator and a systems operator during failure. That’s 2 pilots. Is the A350 really that sophisticated that all failures in Cruise can be handle...

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by mxaxai
Wed Jun 16, 2021 4:54 pm
Forum: Civil Aviation
Topic: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS
Replies: 254
Views: 20999

Re: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS

Would be interesting if instead of a simple dead-head button they asked the pilot for some info gained from scanning i.e. what is the next waypoint, what is current fuel state, etc. Ideally it would be voice driven but then we get into language concerns. Fighter jets and automobiles have been using...

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by mxaxai
Wed Jun 16, 2021 4:43 pm
Forum: Civil Aviation
Topic: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS
Replies: 254
Views: 20999

Re: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS

Against: if ac systems can be trusted without pilot oversight, then pilots are unnecessary during cruise in the first place (and if not then going without a pilot is unacceptable). The question is, how long can you trust the systems on their own, not if you can trust them at all. If the sleeping pi...

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by mxaxai
Wed Jun 16, 2021 3:51 pm
Forum: Civil Aviation
Topic: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS
Replies: 254
Views: 20999

Re: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS

"Single pilot" ops already exist at some airlines by letting the second pilot sleep in the cockpit during cruise. The major difference that I see here is that (a) Airbus is improving the aircraft's ability to identify and mitigate failures automatically and (b) the second pilot could get s...

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by mxaxai
Wed Jun 16, 2021 10:33 am
Forum: Military Aviation & Space Flight
Topic: USAF Wants to Give the F-22 Raptor an Early Retirement
Replies: 26
Views: 4794

Re: USAF Wants to Give the F-22 Raptor an Early Retirement

checksixx wrote:
There is no law that prevented export of the F-22.

Making exports prohibitively expensive prevents them just as effectively as an explicit ban. Considering how superior the F-22 is said to be, for what other reason would potential allied customers choose not to buy.

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by mxaxai
Tue Jun 15, 2021 2:59 pm
Forum: Civil Aviation
Topic: EU, U.S. Agree to Five-Year Truce in Boeing-Airbus Trade Dispute
Replies: 20
Views: 3326

Re: EU, U.S. Agree to Five-Year Truce in Boeing-Airbus Trade Dispute

This makes no sense to me. If the concern is keeping China out, shouldn't the agreement allow subsidies in equal amount to spur the development of new cutting edge airliners that China couldn't compete with? No, if a Chinese manufacturer attempts to sell airliners in the EU or US, this would allow ...

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by mxaxai
Tue Jun 15, 2021 10:37 am
Forum: Military Aviation & Space Flight
Topic: USAF Wants to Give the F-22 Raptor an Early Retirement
Replies: 26
Views: 4794

Re: USAF Wants to Give the F-22 Raptor an Early Retirement

"Various allies have expressed interest in buying the plane, but U.S. law prohibits its export." 100% False. There is no law in place that prevented export of the F-22. In fact, Japan was nearly a customer, but chose to allocate the money to fund an export variant to the F-35 procurement....

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by mxaxai
Mon Jun 14, 2021 5:14 pm
Forum: Military Aviation & Space Flight
Topic: Space junk
Replies: 26
Views: 2043

Re: Space junk

WIederling wrote:
Where actually is the difference between 10k pieces of space junk and
commercial system consisting of the same number of independently orbiting items?

Working satellites, assuming they have some means to change their orbit, can avoid collisions and can be deorbited in a controlled fashion.

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by mxaxai
Mon Jun 14, 2021 4:06 pm
Forum: Civil Aviation
Topic: GE, Safran announce new airliner engine for the mid 2030s
Replies: 51
Views: 5804

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. Also significantly less noise. Static guide vanes are still a source of noise but better than another rotating part. Regarding SAF, note that SAF and fossi...

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by mxaxai
Mon Jun 14, 2021 3:55 pm
Forum: Civil Aviation
Topic: GE, Safran announce new airliner engine for the mid 2030s
Replies: 51
Views: 5804

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

What sort of performance implications would arise from adding an engine cowling around the propellers? Obviously there are a ton of open-prop aircraft flying every day but it seems like a cowling around the propellers would protect both the blades and any ground personnel around it That's exactly w...

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by mxaxai
Mon Jun 14, 2021 2:56 pm
Forum: Civil Aviation
Topic: Steven Udvar-Hazy: 737 needs replacement
Replies: 144
Views: 15206

Re: Steven Udvar-Hazy: 737 needs replacement

Preferably by going exotic I'd suggest. Or lay the foundation for the airframe to develop into something more exotic down the line. Adaptable wing forms? Higher degree of laminar flow? New lifting body fuselage and lighter weighs thanks to carbon fibre airframe? All of these technologies need more ...

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by mxaxai
Sat Jun 12, 2021 4:56 pm
Forum: Technical/Operations
Topic: Why do some A/C sit in the desert for so long before being scrapped?
Replies: 3
Views: 1470

Re: Why do some A/C sit in the desert for so long before being scrapped?

It isn't just planes stored in the desert that languish like this. There are plenty of abandoned aircraft sitting around at various airports. TG (and others) have a bunch of aircraft sitting in DMK. Some of them were AFAIK damaged by a flood. 2578819 If this photo 0419864 and recent Google maps ima...

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by mxaxai
Sat Jun 12, 2021 1:54 pm
Forum: Military Aviation & Space Flight
Topic: Indonesia contracts 36 Dassault Rafales
Replies: 17
Views: 1665

Re: Indonesia contracts 36 Dassault Rafales

is Indonesia a dependable partner No. of sufficient strategic value. Yes. Indonesia is still a source of Oil and many other natural resources. Any ships from Europe to East Asia must pass through or near Indonesian waters; especially traffic to and from Singapore. Indonesia is the country with the ...

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by mxaxai
Sat Jun 12, 2021 10:48 am
Forum: Military Aviation & Space Flight
Topic: Space junk
Replies: 26
Views: 2043

Re: Space junk

How large/how much mass does something need to be to be counted as a unit of space junk? I presume that a dust cloud consisting in 10,000 particles does not count as 10,000 pieces of space junk. There is no minimum size for space junk. Even tiny paint chippings are counted as debris. Any particles ...

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by mxaxai
Fri Jun 11, 2021 8:24 pm
Forum: Civil Aviation
Topic: European airlines want EU to scrap EU261 compensation rules
Replies: 8
Views: 2489

Re: European airlines want EU to scrap EU261 compensation rules

Quite frankly, the EU customer protection laws are one of the best aspects of the EU. They would be foolish to sacrifice all that just to appease a few struggling airlines. The airlines are, unsurprisingly, doing their utmost to avoid refunds and compensation. Some local courts have been working 24/...

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by mxaxai
Fri Jun 11, 2021 8:10 pm
Forum: Military Aviation & Space Flight
Topic: Indonesia contracts 36 Dassault Rafales
Replies: 17
Views: 1665

Re: Indonesia contracts 36 Dassault Rafales

I think both orders should be added to the long list of "Weapons Indonesia wants but cannot fund". They've been talking about acquiring Rafales for quite some time. Other items on the list: - 8 F-15EX - 2 A400M - 8 V-22 Osprey - 3 A330MRTT - 6 MQ-1 - 15 used T1 Eurofighters - an unknown nu...

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by mxaxai
Fri Jun 11, 2021 3:13 pm
Forum: Military Aviation & Space Flight
Topic: Trinational FCAS Programme News and Discussion Thread
Replies: 113
Views: 35933

Re: Trinational FCAS Programme News and Discussion Thread

Others want a FCAS through pillaging Dassault's IP. Eh, it's not so much that Germany and Spain want Dassault's IP but rather that many systems are being developed around a core of Dassault technologies, which devaluates the research and experience of the other partners. From their POV, only Dassau...

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by mxaxai
Fri Jun 11, 2021 1:13 pm
Forum: Military Aviation & Space Flight
Topic: Buses To Venus
Replies: 1
Views: 369

Re: Buses To Venus

NASA will cooperate with ESA on their EnVision orbiter by providing a high-resolution synthetic aperture radar. https://www.nasa.gov/feature/then-there-were-3-nasa-to-collaborate-on-esa-s-new-venus-mission It's great that Venus is getting some attention. Mars and Venus are both quite similar to Eart...

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by mxaxai
Thu Jun 10, 2021 7:19 pm
Forum: Military Aviation & Space Flight
Topic: Will GE’s XA100 adaptive combat engine transform the F35 ?
Replies: 46
Views: 3518

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. True, more thrust would probably be more useful by providing be...

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