Launch News How A Trampoline Rocket Was Tempered - Angara rocket's maiden flight, July 9, 2014

Cosmic Penguin

Geek Penguin in GTO
News Reporter
Donator
Joined
Jan 27, 2011
Messages
3,672
Reaction score
3
Points
63
Location
Hong Kong
Let me ask a question: if you are asked to list what you would think worth the name "paper rocket", what would you list?

Well Ares V and SLS (:shifty:) and Nova comes to mind, but one solid long time member of this list is Russia's "always in the future" mainstay rocket family - Khrunichev's Angara rocket. Poised as the one-stop-for-all solution to replace the notorious Proton rocket and also various smaller sized rockets (like the Rocokt and the retired Tsyklon), one of the main selling points of Russia's next-generation satellite lifting workhorse was the use of common rocket stages (Universal Rocket Module, URM) as the building blocks across all configurations, with tried-and-true kerosene powered engines powering them. The URM-1 first stage/boosters uses the RD-191 engine, i.e. "half-a-RD-180" or "one-quarter-RD-171" that shares lineage to the engines powering the Energia, Atlas V and Zenit rockets, and has already powered KSLV-I, the first (south) Korean rocket; the URM-2 second stage uses the RD-0124 engine already flown on the Soyuz-2 series. On paper at least, the Angara is a well-conceived design that would be very competitive in the commercial market and provide better reliability than the Proton and Rocokt for Russian government missions.

Except there's one thing - the first launch of the Angara seems to be always "2 years in the future". Conceived in the early 1990s at the formation of the new Russia and formally endorsed since the turn of the millennium, the project has been plagued by finanical problems for many years and wasn't even in full force till about 10 years ago. Even after that, development problems pushed the maiden flight year after year until it all seems that Russia's "paper trampoline" is going nowhere.

But the day has finally come. Tomorrow is the day that Russia's future rocket flagship will finally fly - a day that may turn out to be the watershed of its spaceflight history.

Good luck! :tiphat:

(details coming soon.....)

640px-Angara_missiles.jpg


7%288%29.jpg


16%286%29.jpg


19%286%29.jpg


24%283%29.jpg
 
Last edited:
New launch vehicle, Whoo hoo!
Well, newish since the Angara core is also the KSLV, but still, all the best to the team.
 
About the "Angara-1.2PP"

So the first flight of the Angara rocket will be carrying a dummy payload on an intentionally sub-orbital trajectory, with the head unit hitting the Kura test range on the Kamchatka Peninsula. Feeling strange? Well a similar thing was done to the first flight of the modernized Soyuz-2 series - flown in November 2004, it tested out the rocket's new digitalized control systems before its first orbital launch mission in 2006.

The first Angara rocket to fly will be in the "Angara-1.2PP" configuration. So what is it? Refer to the [ame="http://www.orbithangar.com/searchid.php?ID=5965"]Angara rocket add-on available here [/ame] if you are confused. Put it shortly, the Angara-1.2 is the base configuration with one URM-1 first stage module and one URM-2 second stage module (but see below), which can put about 4 tonnes into low Earth orbit.

But what about the "PP"? It turns out that the second stage is too large for optimization for the single core versions. However on this first flight it is hoped that both parts can be certified for the future 5-core Angara-5 test flight in early 2015, so they use the full URM-2 for this flight. Hence "PP" - "first flight" in Russian.

angara1pp_infograph_1.jpg


cutaway_1.jpg


infograph_1.jpg


(from the excellent RussianSpaceWeb.com: http://www.russianspaceweb.com/angara1pp.html)
 
The launch pad

So what about the launch pad? The first new pad for the Angara rocket is located at Site 35 at the Plesetsk Cosmodrome. Construction started there in the 1980s when it was planned as a Zenit rocket launch facility - however after it was mostly completed the plan was cancelled with the downfall of the Soviet Union. Later on plans call for it to be modified for the Angara rocket - a project that took many years to complete due to extremely limited funding. It was not until last year that the pad - including the large green mobile gantry - was completed.

The horizontal integration building is in nearby Site 141, and was originally a Soyuz rocket processing facility for the now closed pad 41/1. It was refurbished for the Angara in the last few years.

2%2821%29.jpg


3%2816%29.jpg


10%2811%29.jpg


angara_placing_25.jpg


26%21%21%21.jpg
 
Time Sequence Plan:

Т = 15:15 Moscow Time (11:15 UTC) - lift-off
Т+222 - 1st stage separation (will drop into Eastern Barents Sea)
Т+224 - 2nd stage ignition
Т+232 - Payload fairing jettison
Т+491 - 2nd stage engine's shutdown
Т+1260 - the remnants hit ground at Kura test range in Kamchatka peninsula.
 
thats gotta hurt a little... right there <3
 
Are they going to try today?

Likely not. It seems like there is some mechanical problem that needs fixing. Quote by russianspaceweb.com:

According to a reliable source on the Novosti Kosmonavtiki web forum, a leaky valve on the rocket had to be replaced before the next launch attempt.

The live audio, which was available during the final minutes of the countdown, indicated that the launch officer called a 40-second readiness for liftoff before reporting a scrub. According to a veteran of Baikonur Cosmodrome and the Russian space historian Vladimir Antipov, the scrub at that moment could indicate a failure in the pneumatic and hydraulic system activating the rocket's propulsion system. A screenshot of the launch countdown clock, which had surfaced on the Internet, indicated a scrub at T-1 minute 19.7 seconds. It then transpired that the loss of pressure in a flexible gas line of the propulsion system caused the delay.

It could take as long as a week to fix the problem, industry sources said on the Novosti Kosmonavtiki web forum. GKNPTs Khrunichev, the Angara's manufacturer then posted a one-line press-release saying that the date of the next launch attempt would be announced later.

According to other sources, a valve on the oxidizer line failed, which could require to return the rocket to the assembly building, to cut out the device and weld in the new valve. Due to a built-in nature of the valve, the return of the rocket to the manufacturing plant in Moscow could also be required, likely postponing the mission for weeks.

My guess: The next launch from Plesetsk will be a Rokot, the rocket this version of the Angara should replace.
 
Let's hope it means that the faulty/insufficient checkout procedures of the Proton are history.
 
Back
Top