Russian Armed Forces News & Discussion thread

[owais.usmani]

Liquid fuels offer much higher specific impulse (~450 seconds versus ~250 seconds), thus allowing more efficient engines and higher throw weight, because higher specific impulse allows the missile ho have lower fuel mass in proportion to the whole mass. That's why most space boosters are liquid-fueled, and heavy ICBMs traditionally also being based on liquid fuels. They also give better performance in vacuum, which is why even for the solid-fueled missiles upper stages often use liquid fuels.

Are you sure? Topol/Yars/Bulava/Minuteman/Trident any one of these have liquid 3rd stages?

[Khathi]

Peacekeeper used liquid fuel in its post-boost stage, and Bulava was said to use liquid fuel in its third stage, in trans-atmospheric part of the boost. It probably doesn't, as there are conflicting reports of its third stage, but it's rather possible that just like MX it uses it in the post-boost stage anyway.

[Andy_UA]

Peacekeeper used liquid fuel in its post-boost stage, and Bulava was said to use liquid fuel in its third stage, in trans-atmospheric part of the boost. It probably doesn't, as there are conflicting reports of its third stage, but it's rather possible that just like MX it uses it in the post-boost stage anyway.

Correct. The abovementioned missiles are all solid fuel (there is a thread on Bulava). But these are all light to medium weight missiles.(Well Trident 2 is heavier). owais - follow the link I gave in previous post to see that SS-24 also used liquid delivery stage.
That must tell you something.) Among other things its easier to make a guidance system and more simple manoueving.

P.S. Correction - Of course I was speaking of post boost vehicle not 3rd stage. If you seen Bulava PBV frame youll see where it looks similar to Trident 2 BTW.
People usually mix up 3rd stage and delivery stage. I fell to this sin too.))

[AustinJ]

Thats true most ICBM PBV or BUS are liquid fuel stage and injection of warhead and consequently the accuracy of warhead RV depends on it in case of Passive RV, Liquid Fuel would allow much easier to control manouvering for PBV.

But I doubt Bulava and PS-24 has PBV as it was suggested it had independent manouvering warhead which made PBV redudant.

[Einhander]

Well, my concern with liquids was the maintenance costs. It's a big deal with things that must be in operational state 24/7/365 and should never be actually used in the same time..

[owais.usmani]

Correct. The abovementioned missiles are all solid fuel (there is a thread on Bulava). But these are all light to medium weight missiles.(Well Trident 2 is heavier). owais - follow the link I gave in previous post to see that SS-24 also used liquid delivery stage.
That must tell you something.) Among other things its easier to make a guidance system and more simple manoueving.

P.S. Correction - Of course I was speaking of post boost vehicle not 3rd stage. If you seen Bulava PBV frame youll see where it looks similar to Trident 2 BTW.
People usually mix up 3rd stage and delivery stage. I fell to this sin too.))

Thanks Andy.

[metberkut]

The radar is already developed, and has been in development for the past 5+ years, there's that time you mention.

No it isn't. New radar is in works...

[Eagle9294]

I remember reading years ago that the SS-18 was the most powerful nuke in the world. That it would give you a permanent orange afro.

[artjomh]

Liquid fuels offer much higher specific impulse (~450 seconds versus ~250 seconds), thus allowing more efficient engines and higher throw weight, because higher specific impulse allows the missile ho have lower fuel mass in proportion to the whole mass. That's why most space boosters are liquid-fueled, and heavy ICBMs traditionally also being based on liquid fuels. They also give better performance in vacuum, which is why even for the solid-fueled missiles upper stages often use liquid fuels.

The PBV (not third stage) is typically liquid-fuelled because, unlike solid fuel, it can be started and restarted, which allows to control PBV attitude and vector through engine bursts. Just like a spaceship.

[sepheronx]

No it isn't. New radar is in works...

How many test units are there of the Zhuk-AE FGA-29 radar? I thought they already have a few flying? Or do they require a few before going into production stage?

[GunshipDemocracy]

Lenta update:

http://www.microsofttranslator.com/b...%2F07%2Fa42%2F

A new anti-submarine aircraft to be chosen till end of the year.



http://lenta.ru/news/2012/09/07/shkval/
New Shkval - no guidance yet, short range ;( so IMO only possibility is to use it as unmanned submarines for 'single use missions' to eliminate Carrier Task forces

[Andy_UA]

http://lenta.ru/news/2012/09/07/shkval/
New Shkval - no guidance yet, short range ;( so IMO only possibility is to use it as unmanned submarines for 'single use missions' to eliminate Carrier Task forces

Let's add that this is a concept and a company proposal.

[Rubick]

Lenta update:

http://www.microsofttranslator.com/b...%2F07%2Fa42%2F

A new anti-submarine aircraft to be chosen till end of the year.



http://lenta.ru/news/2012/09/07/shkval/
New Shkval - no guidance yet, short range ;( so IMO only possibility is to use it as unmanned submarines for 'single use missions' to eliminate Carrier Task forces

Oh, for god sakes are you still dreaming about unmanned submarines ? it's not possible and won't be for a long, long time unless you don't want it to dive deeper then 50 meters.

[Andy_UA]

Serial production of a new Anti-radiation missile has began(link). The Kh-31PD. While the ASM variant Kh-31AD is also ready for production.

[African-European]

Expert: New Russian ICBM can carry bigger warhead

Russia’s new heavy intercontinental ballistic missile will have a 5-ton warhead, which is four times that of its predecessors, a former military commander said on Friday.
“The new ICBM will have a payload four times bigger than that of the Yars missile,” said Col. Gen. Viktor Yesin (Ret.), advisor to the Russian Strategic Missile Forces (SMF) commander, who served as SMF chief of staff in 1991-93.
“The 45-ton Yars has a payload of 1.2 tons. The new missile will be able to orbit a payload of 5 tons.”
The new missile will have a greater capability for missile defense penetration, he said.
SMF chief Col. Gen. Sergei Karakayev said this past Monday that Russia will build a new ICBM by 2018. The new missile is to replace the R-36M2 Voyevoda (NATO reporting name SS-18 Satan) missile.
So far all of Russia’s recent ICBM projects, both sea-launched (Bulava) and ground-based (Topol-M, Yars), have been solid fuel.
Karakayev said the new ICBM will have a launch mass of around 100 tons with a better payload-launch weight ratio than in a solid fuel missile.Such ICBMs can only be deployed in silos.
The Russian Defense Ministry previously said that unless the United States abandons its plans to create a missile defense system in Europe, Russia will take counter measures, including building a new heavy liquid-propellant missile.

http://en.rian.ru/mlitary_news/20120907/175827204.html