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rheinwaldner

Re: Fokker Next Gen Update

Since photo realistic 3D renderings can be created cheaply by nearly everybody, nearly everbody is presenting nice NextGen <fill-in-arbitrary-old-aircraft-type>

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rheinwaldner

Re: How to defend against slow unmanned strike vehicles?

Even the more conventional Gepard shells reportedly cost around 1000€/$ each. That I doubt. In a deal for the Jordanians, 350'000 bullets were sold for 21 mil € which would make 60€ per bullet if the deal would not also have contained 60 Gepards, 22 Bofor AAA and 5 Radarsystems. Looking at a realis...

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rheinwaldner

Re: How to defend against slow unmanned strike vehicles?

Can WWII technology, with carrier groups shooting infinite amounts of proximity-fused ammo at kamikazes, be an inspiration? Of course, radars and computers got much better in the meantime, so probably less ammunition can be expended... Contraves/Rheinmetal has the AHEAD ammo, which is programmed wh...

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rheinwaldner

Re: How to defend against slow unmanned strike vehicles?

In appearance these were cost effective shots, but it takes more than a few bullets to successfully shot down such a drone. It can only happen with a good radar, a sophisticated fire control, and a stabilized gun, among other things. These things are not cheap. The Skyranger mentionned is the best ...

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rheinwaldner

Re: How to defend against slow unmanned strike vehicles?

https://www.youtube.com/watch?v=pb5_F4_Eod8
These are obviously very well suited for this task.

rheinwaldner

Re: AS1282 PDX-ONT decompression event, returned to PDX, FAA temporarily grounds 737MAX9 for inspections

I'm not a big fan of mainstream media, but sometimes reporters ask stupid questions because it's their job. The public wants to know if this is a MAX issue. So reporter (knowing it's not) will ask that question, and the relevant people will explain calmly that it is not a MAX issue. Which would be ...

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rheinwaldner

Re: AS1282 PDX-ONT decompression event, returned to PDX

757pencilnose wrote:
I'd be curious if its determined to be a MX issue and not a Spirit/Boeing assembly/manufacturing/QC issue.

How can it be a maintenance issue so short after service introduction?

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rheinwaldner

Re: How to defend against slow unmanned strike vehicles?

The 35mm Oerlikon system ( from which also the Gepard is a descendant ) also shoots ahead ammunition: https://youtu.be/SH-FehlT3_4?t=253 The projectile is programmed when leaving the gun barrel and will burst exactly after the programmed time. This way, the fire control computer is able to consider ...

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rheinwaldner

Re: Sonar Bouy on a quad-copter

https://umsskeldar.aero/
Is developed close to where I live and I almost applied for a job once there...

rheinwaldner

Re: B-21 Rolling out on Dec.2

TWA772LR wrote:
is designed for first strike capabilities in a nuclear war,

How can they prevent the submarines from firing the "reply"? I don't see first strike fundamentally enabled by these. What brings the B-21 to the table that could not be covered by western ICBMs and SLBMs?

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rheinwaldner

Re: The future of attack helicopters????

You say that the Karbala operation was a single mishap. Can you tell about a single succesful operation of attack helicopters over urban areas? Among the reason why they failed, was "because the fighter bombers had left the area", which means that helicopters on their own are vulnerable. ...

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rheinwaldner

Re: The future of attack helicopters????

RJMAZ wrote:
1) They are flying very high
2) They have no terrain following radar to fly nap of the earth.

Are you aware about Ukrainian terrain? It is so flat, that nobody needs a terrain follow radar.

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rheinwaldner

Re: The future of attack helicopters????

The Apache is not fragile it could take more bullets than any fixed wing aircraft besides an A-10. So out of the thousands of flying things in the world the Apache is number 2 least fragile. So you calling all helicopters fragile is 100% incorrect. The Apache is invisible to ground based radar as t...

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rheinwaldner

Re: The future of attack helicopters????

What a ridiculous statement. So can a F-15 land on a roof and drop off 10 soldiers? Please stick to the thread topic, which is attack helicopters. Their delivered ordnance per lost vehicle ratio is terrible. Magnitudes of orders lower than for fixed wing operations. Helicopters will always be fragi...

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rheinwaldner

Re: The future of attack helicopters????

Helicopters performed badly or those responsible for planning the missions did not coordinate properly? I don't know. Personally I would just not feel comfortable entering areas where people are shooting while being 100% dependent that nothing touches the vulnerable mechanism of my rotorhead ... In...

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rheinwaldner

Re: The future of attack helicopters????

The attack helicopter is fast becoming the most survivable platform on the battlefield which is why the US is investing so much money. Imho this is heavily exaggerated. Helicopters performed badly overy contested or just urban area. As a radar operator in a system like this , I have experienced per...

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rheinwaldner

Re: Russian Invasion of Ukraine - Military Aviation News and Discussion Thread

It is interesting on how Ukraine was able to obtain local air superiority over the southern edge of the Kerson front. For me the interesting part is how weak the Russians are and how ancient their methods are. They seem not to be able to execute any of the modern types of warfare. E.g. they seem to...

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rheinwaldner

Re: Tara Air DHC-6-300 has lost contact.

Pokhara - Jomsom is a very short fligt. The Kali Gandaki valley in this area is the worlds deepest gorge . Very close also to the highest point, where ever a fixed wing aircraft landed and took off: Dhaulagiri northeastcol by the PC-6 prototype flying for a Swiss expedition in 1960. Sad story, havin...

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rheinwaldner

Re: Russian Invasion of Ukraine - Military Aviation News and Discussion Thread

The Russians canceled the air show flyovers during their Victory day celebrations in many cities: https://www.forbes.com/sites/craighooper/2022/05/09/purged-nervous-putin-cuts-russian-air-force-from-2022-victory-day-parade/?sh=3987801b7f1a The big question, imho unanswered, is why the Russian plane...

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rheinwaldner

Re: Russian Invasion of Ukraine - Military Aviation News and Discussion Thread

The Russians canceled the air show flyovers during their Victory day celebrations in many cities: https://www.forbes.com/sites/craighooper/2022/05/09/purged-nervous-putin-cuts-russian-air-force-from-2022-victory-day-parade/?sh=3987801b7f1a The big question, imho unanswered, is why the Russian planes...

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rheinwaldner

Re: Russian Invasion of Ukraine - Military Aviation News and Discussion Thread

flyingturtle wrote:
I described certainties, not "what ifs".

No, read your post again. Your whole claim depends on a condition (starting with "if he ...") to be true, which was not true as history went.

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rheinwaldner

Re: Russian Invasion of Ukraine - Military Aviation News and Discussion Thread

This is wrong on several levels. I simply wrote what happened and you use tons of "if"s and "would"s to fabricate a history that supports your strange narrative. Using the same number of ifs and woulds I could create a scenario, in which the pope would have become king of Switze...

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rheinwaldner

Re: Russian Invasion of Ukraine - Military Aviation News and Discussion Thread

If Switzerland avoided war with the combined might of Germany and Italy in 1942 ... that's a decision. No, not a decision. An accomplishment. Switzerland is the only soil in central Europe, where since 1803 no foreign armies marched. Switzerland was really hated by the United States during the latt...

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rheinwaldner

Re: Russian Invasion of Ukraine - Military Aviation News and Discussion Thread

If Switzerland avoided war with the combined might of Germany and Italy in 1942 ... that's a decision. No, not a decision. An accomplishment. Switzerland is the only soil in central Europe, where since 1803 no foreign armies marched. And the reason why Switzerland was neutral since then is, because...

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rheinwaldner

Re: Russian Invasion of Ukraine - Military Aviation News and Discussion Thread

If Switzerland avoided war with the combined might of Germany and Italy in 1942 ... that's a decision. No, not a decision. An accomplishment. Switzerland is the only soil in central Europe, where since 1803 no foreign armies marched. And the reason why Switzerland was neutral since then is, because...

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rheinwaldner

Re: Russian Invasion of Ukraine - Military Aviation News and Discussion Thread

bikerthai wrote:
It's been a week. Has anyone seen any Russian videos of Ukrainian armor being attacked?

Official Russian PR wording says, that there is no war. Hence there are no videos showing a war. Plus, they took the smartphones away from every soldier before they let them into Ukraine.

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rheinwaldner

Re: Updated: Switzerland deciding to buy F-35A fighter jets

A fine example of time space discontinuity. Even 30 years ago there would have been 0 incident of Swiss air space being violated by a hostile force in the form of the Warsaw Pact. Now, even more so. I just posted a real world example of a series of incidents which did occur and during which NATO wo...

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rheinwaldner

Re: Updated: Switzerland deciding to buy F-35A fighter jets

RJMAZ wrote:
It is hard to think of a situation where Switzerland needs any fighters at all. Any threat to Switzerland would be taken out by NATO aircraft.

Only 30 years ago the air space of Austria, one of Switzerlands neighbors, was violated many times by hostile MIGs. NATO has taken out exactly none of them.

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rheinwaldner

Re: Updated: Switzerland deciding to buy F-35A fighter jets

So now with the F-35 decision going to a referendum it only takes a swing of 0.2% of people who hate the US and the F-35 deal is blocked. No, it will be a people initiative (as the aim is not to reject a law decided by the parliament). A such people initiative requires not only the majority of vote...

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rheinwaldner

Re: Updated: Switzerland deciding to buy F-35A fighter jets

They had to memorize every corner of every mountain so they could "fly around blindly". The idea was, in case of an enemy infiltration by air, to use the mountains as a hide and seek tool to win any dogfight. I absolutely believe that. Also, using ridges and valleys in order to sneak up o...

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rheinwaldner

Re: Switzerland Restarting Fighter Competition

mileduets wrote:
But against drone attacks with recent drones such events have become vulnerable. The current systems can't handle them. The need for up-to-date ground based air defence is more urgent.

Why is Skyguard not capable against drones?

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rheinwaldner

Re: Switzerland Restarting Fighter Competition

The referendum would not actually be a referendum but a popular initiative. That means, that not only the majority of voters would have to decide against the F-35 but also the majority of the cantons (=states, Standesmehr). And this second criteria is hard to win for left wing/green initiavies. So t...

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rheinwaldner

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

provided we're implementing technical solutions which make sure that if the single one falls asleep or has any problem, there won't be any unsafe conditions." Should be possible. Billions of passengers have reached safely their destination during the last 100 years, sitting in trains driven by...

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rheinwaldner

Re: Kai Tak Checkerboard - Restored

https://modelinstruments.com/gallery

rheinwaldner

Re: Porter orders 30 Embraer 195 E2 (?) - Article

Since when has the E195 the cockpit windows of the C-Series?

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rheinwaldner

Re: F-15X has no mission!

I'm still waiting for a common mission where the F-15X is the best platform. So far I've read about dropping 5000lbs bobs (only three used in the last 30 years), hypersonic missiles (not yet around), and very long range strike (not a common mission, probably better done by the F-35 if you need to p...

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rheinwaldner

Re: Boeing 737MAX Grounding, General Discussion Thread, Q4 2020

As pointed out above, every jet airliner with swept wings since the 707 has been unstable due to dutch roll and has had a Stability Augmentation System in the form of a yaw damper. People are throwing around the word unstable because it sounds scary, but it is not. Every jet airliner with swept win...

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rheinwaldner

Re: Boeing 737MAX Grounding, General Discussion Thread, Q4 2020

It was the nonlinearity of the nose up tendency with respect to stick force. A nonlinearity becomes an instability, if the 2nd derivative becomes negative . Here I have a polynom, which between 1 and 10 could be our stickforce vs AoA curve: click The second derivative now shows, that between 2 and ...

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rheinwaldner

Re: Boeing 737MAX Grounding, General Discussion Thread, Q3 2020

Please quote examples of proof that the "impairment" was a result of time and money pressure and not due to an unfortunate error in human judgment yourself since you know what you are referring to, rather than expecting others to find them in a huge report. This one I found after 30 secon...

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rheinwaldner

Re: Boeing 737MAX Grounding, General Discussion Thread, Q3 2020

If I'm to play devil's advocate, I'd say it's a throw-away statement. Time and money pressure is the norm in engineering jobs. It doesn't break the cover story that all this is due to an unfortunate error in human judgment. You need to do partial quoting to get that conclusion. The report did not j...

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rheinwaldner

Re: Airbus is stepping up development A321XLR

oschkosch wrote:
Only pain was the return trip to FRA had a fuel stop in either TBL or OTP.

(IATA?) TBL = Tableland airport (TBL), Tableland, Australia?

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rheinwaldner

Re: Boeing 737MAX Grounding, General Discussion Thread, Q3 2020

If I'm to play devil's advocate, I'd say it's a throw-away statement. Time and money pressure is the norm in engineering jobs. It doesn't break the cover story that all this is due to an unfortunate error in human judgment. You need to do partial quoting to get that conclusion. The report did not j...

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rheinwaldner

Re: Boeing Removes 8 x 787 From Service over Structural Issues

So about at least every thenth 787 flying around has built in one of the two issues! I was wrong... x = 0.089 -> occurence of one of the issues. So the number of 787s with at least one the issues is x + x. Means 2x = 0.18 Means that nearly every fifth 787 has built in one of the two issues. Which m...

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rheinwaldner

Re: Boeing Removes 8 x 787 From Service over Structural Issues

8 of 1000 is a rate of 0.008. Sounds negligible. A bit more concerning is the fact, that in these 8 aircraft the combination of two production issues is present: Wrong shimming and not smooth enough inner surface. Under the assumption, that these two issues are unrelated and that they occur more or ...

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rheinwaldner

Re: Boeing Confirms 747 Production Will End in 2022, Delays 777X Entry to 2022, Reduces 787/777/777X Production

The most advanced technologies and materials A blend of evolutionary and revolutionary designs will enable the GE9X to be the most fuel-efficient jet engine GE has ever produced on a per-pounds-of-thrust basis. It’s designed to deliver a 10% improved aircraft fuel burn versus the GE90-115B-powered ...

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rheinwaldner

Re: Boeing 737MAX Grounding, General Discussion Thread, April 2020

Better training would probably not have saved the 2 MAX, yet if you look at the crew coordination and reaction times, they would still struggle with a serious fault in any modern airliner. Any other airliner is so much more fault tolerant, that the same level of crew proficiency is not causing huge...

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rheinwaldner

Re: Boeing 737MAX Grounding, General Discussion Thread, April 2020

Better training would probably not have saved the 2 MAX, yet if you look at the crew coordination and reaction times, they would still struggle with a serious fault in any modern airliner. Any other airliner is so much more fault tolerant, that the same level of crew proficiency is not causing huge...

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rheinwaldner

Re: Boeing 737MAX Grounding, General Discussion Thread, March 2020

Please discuss the ET302 report in a separate thread and keep this thread on topic. Thanks. well, it obviously was not a problem for the moderation that some users since months mixed a discussion about pilots training into this thread at every stage possible. one user has managed to use the term &q...

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rheinwaldner

Re: Boeing 737MAX Grounding, General Discussion Thread, March 2020

Correct, we don't know these things. But don't use this to blurry things. We know this: https://9jfopq.am.files.1drv.com/y4mU_PxA_f3ndX4KOySeU-lyFumvVnw1vx1jt-t4rY2x7ti5vmRV3k3xgU6cvoctfAt_MJ9_n_QPct2B4bENrRFW96Gab7m71WJhE5kKfFsY9i1cywHWbHG8Cj-ftPNZu_hiN1QttAG6_f7g5w1KSoIryBdqkYFmtAA5GxU1_2KZQUdsol...

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rheinwaldner

Re: Boeing 737MAX Grounding, General Discussion Thread, March 2020

We still don't know the nature of what Bloomberg says FAA referred to "extensive errors" were. We don't know if they equate to narrowly miss killing people as some might suggest. Correct, we don't know these things. But don't use this to blurry things. We know this: https://9jfopq.am.file...

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