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Aerospace / Re: Chengdu J-20 news, pictures, analysis Part III
« Last post by PaulMM (Overscan) on Yesterday at 11:51:53 pm »
Indian Air Force generals may be politically savvy enough not to say "our Su-30s are completely useless now China has J-20s", too.

Air Chief Marshal B.S. Dhanoa, while addressing the media at Halwara on Thursday, said that signals from the J-20s can be picked up easily by existing radar from several kilometers away against the currently held belief. Air Chief Marshal Dhanoa also said that the IAF is better equipped and prepared to tackle any threat from China.

"The Sukhoi's radar can see them. The new Chinese jets are not so invisible after all. No special technology is required to detect the J-20, as it can be detected by ordinary radar stations," Indian Air Force commander Arup Shaha said.
Space Projects / Re: Queqiao - Chinese Lunar Communication Relay Satellite
« Last post by Flyaway on Yesterday at 11:39:40 pm »
China launches Queqiao relay satellite to support Chang'e-4 lunar far side landing mission

China has successfully launched a lunar communications relay satellite designed to support an unprecedented mission to put a lander and rover on the far side of the Moon in late 2018, as well as carry out pioneering astronomy.

The Chang’e-4 relay satellite, accompanied by two microsatellites, lifted off atop a Long March 4C rocket from the Xichang Satellite Launch Centre at 21:28 UTC on Sunday (05:28 Beijing time, May 21).

The spacecraft was successfully inserted into a lunar transfer orbit and separated from the rocket’s upper stage, the China Aerospace Science and Technology Corporation (CASC) – the main contractor for the space programme – confirmed just under an hour after launch.

Named ‘Queqiao’ – referencing a ‘Magpie Bridge’ from a Chinese folklore of lovers crossing the Milky Way – the relay satellite is now on an 8-to-9 day journey to the second Earth-Moon Lagrange point (E-M L2) some 60-80,000 kilometres beyond the Moon and nearly half a million kilometres from Earth.
Aerospace / Re: A-X all over again - USAF pushes for A-10 replacement
« Last post by crabanero on Yesterday at 10:45:46 pm »
I accept the fact (even though it is not a good one, IMO), that the replacement for the best (again IMO), will be a small prop plane that the AF still doesn't want. This is just to quiet the "law makers" who send the money to the AF. At some point in the future, maybe 20 years, a new aircraft will fill the role. The aircraft will be something better than what the "money folks" want now...
Aerospace / Re: Chengdu J-20 news, pictures, analysis Part III
« Last post by Airplane on Yesterday at 06:16:49 pm »

Indian said their Su-30 could detect J-20, and they thought J-20 could not change regional balance of air-power.

The J-20 could have been fitted with RCS enhancement devices like US stealth aircraft. They have been photographed with them.

I am willing to bet India is smart enough to know if they are reading returns on a radar reflector or an aircraft. The world has grown up. Detected with what wavelength of radar is the question.... THE question. If they can't target it with said radar wavelength, it doesn't really matter as we all know. Or maybe China left off a lot of ram in order to make the detection intentional but more plausible than a radar reflector which reflects all wavelengths. There are easy methods of determining whether or not a return is from a reflector!
Theoretical and Speculative Projects / Re: Modern Mechanix -- Helicopter Cavalry
« Last post by RAP on Yesterday at 05:55:24 pm »
Is this really practical? Would they fire the AT rocket or bazooka, whatever it is in flight?.  I can image the blast interfering with the tail rotor and main rotor if they did and I would not want to be the crewmember on the other side.  Also no armor protection.  Is it meant as a troop transport or some kind of light attack vehicle? 
Tumble and explode as a model for recoverable engine separation?

What?   Did you even watch it before you made the asinine snark comment? Or do you have to be hand walked through the video to figure out that there was no tumble or explosion and that the video was mislabeled.    4A was the first Atlas launched and it did tumble and explode but that has nothing to do with this.  The video is of 7F staging

  You were fixated on the issue of separation.  This shows that it was solved a half a century ago.
Those weren't recovered and reused, they just crashed into the ocean. A lot simpler than a recoverable module.

The topic was the issue of separation.  Nothing else was discussed.   Of course,  recovery would have to be designed in, but that is simple.
Postwar Aircraft Projects / Re: Vought 'Eaglet' NGT designs
« Last post by Bill S on Yesterday at 04:47:26 pm »
Here is a recently found drawing of the V-539 from early May 1980, that is slightly
different than other drawings in this thread. The intakes are in the wing leading
edges and the "strakes" around the fans. The length is a little shorter than other iterations as well.

First display of "Lingyun” hypersonic Chinese missile.

Interesting looks familiar

Watch your tongue! China NEVER copies anything.  (Sadly, they'll get it to work because they don't give up after two tries.)

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