sferrin in several threads you pointed out that Russian make mistake by using H2 and you are right,but only if you think that H2 will be used in all future rockets/planes.Russians use H2 forced by few reasons.The main purpose in all their experiments is to test engine combustion in speeds above M5.But there is a problem with the heat.Here is small table that show you how important is flight altitude for heat level.
Mach number 1,0 1,5 2,0 2,5 3,0 5,0 10,0
Height of flight 50 м
Speed m/s 340,3 510 681 851 1021 1701 3403
Speed km/h 1225 1837 2450 3062 3675 6125 12250
Heat level ,К 346 418 519 648 807 1729 6051
Heat gain ,К 58 130 231 360 519 1441 5763
Height of flight 11 km
Speed m/s 295,0 442 590 737 885 1475 2950
Speed km/h 1062 1593 2124 2655 3186 5310 10620
Heat level ,К 250 314 390 487 606 1300 4550
Heat gain ,К 43 97 173 270 389 1083 4333
Why i posted this?Because all russian experiments are done in high altitudes,where O2 is low but the heat also is low.That is why they use H2 and liquid O2 in their test vehicles.The most important thing right now is to understand the principles behind supersonic combustion.Heat level is known how to “fight” in their half century experience in space.In future,when there is knowledge how to make stable engine capable of atleast several minute flight,there will be new fuel.As you may know Kh-31 use solid fuel,and also Russians have wide experience in using two-component fuels.Yes that means that the future rockets may suffer from using two component fuels,but that is necessary if you want high speed (M>7) soon.NASP X-30 also use H2 and O2,forced by the lack of oxygen in high altitudes.Here is some experiment vehicles that they build over the years(in short):
“Holod”(Cold)
Used to test H2 use in rockets/planes.Development begin in 6 Mart 1979.First flight 28 November 1991 in Khazakstan.Achievements.
[PHP]Date: Speed, m/s Heigh, km Mach number Engine running time, s
27.11.91 1653 35 5,6 ———-
17.11.92 1535 22,4 5,35 27,5
1.03.95 1712 30 5,8 41,5
1.08.97 1832 33 6,2 ———–
12.10.98 1863 33 6,2 77[/PHP]
The last flight was limited by the maximum flight time of the rocket,engine proved to be capable of more than that.
Three of the experiments was with partners from NERA, Aerospatiale, SNECMA-SEP(France) and NASA.This live tests compared with the 15s HyFly engine run is quite impressive.
Kh-90
This missile is equiped with hydrocarbon based fuel(kerosine).Speed M4-5,with range around 3000km in altitudes between 7000-20 000 meters.The missile is developed by “Raduga” design bureau,creators of AS-4,AS-6,AS-16,AS-9,SS-N-22,AS-15,AS-11 missiles.
Later some information about other projects.
BACK TO TOPIC(and prease no more ww2 spam)
On 28 June there was a visit in Varna(Bulgaria) of Il-76 and Su-30MK on their way to Venezuela.Here is some photos.
Later there will be some of Il-76 on it’s way back.There is rumor that this will be around 14-20th July.
Few more:
sferrin i think the guy just misunderstood the picture.The plane looks like tailless B-1 and Tu-160,or Swallow watched from angle.Only if you know allready or make little research you can find that the design is completely and radically different.
Found this few minutes ago:
“It had to happen some day. I guess the pilot of this Super Bug is pretty proud of himself. Here are two HUD captures from a VFA-11 F/A-18F acting as Red Air against an F-22A
Looks like the Raptor found himself in front of a slow Super Hornet, which is not where anybody wants to be. The F-18F is at 15K feet, 20 degrees AOA, Mach 0.36, pulling 1.7G, with a peak previous G of 7.6 for the fight. HUD shows he has squeezed the trigger. It’s not exactly what you’d call “comfortably saddled up in his six” or anything like that — it’s clearly a high deflection shot — but it does show the Super Hornet can point its nose when it wants to.”
Sens you don’t believe the information from russian websites,but here is some from ACIG.You may find it have more credibility.
“During April and May 1980 four Yak-38s and four AV-MF pilots were deployed to Afghanistan as part of a 50-day trial codenamed Romb-1, although the ‘hot and high’ conditions prevented any meaningful combat missions from being undertaken – in total, 12 combat sorties were made, but only two 100-kg bombs could be carried. In the event, any involvement would have been further limited by the ‘near-operational’ nature of the Romb-1 deployment (which also involved the first and third prototype Su-25s). The aircraft involved were not intended to be subject to combat, but rather tested under conditions that simulated the battlefield to a high degree. Despite their official non-operational nature, aircraft involved in the Romb trials could be requested to undertake combat sorties by local divisional commanders, on an ad hoc basis. The Yak-38s and prototype Su-25s operated out of a specially prepared air base near Shindand. Even with a much-reduced fuel and weapons load, the Yak-38 proved incapable of operating during the hot daylight hours (after around 0500 hrs); on the basis of this poor showing, the VVS quickly lost any remaining interest it had in the type.”
This is the hole article
And if you were searching just a little you can find also video from that operation:http://video.aviacia.ru/index.php?s=141
It’s about russian VTOL fighters and there is some(even short) about “Romb”
And if you still don’t believe i can post the names of the pilots,plane numbers,airfield names,dates of testing and first flights.
Here is camouflage scheme of that operation.
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