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Bobo

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  • in reply to: Small Air Forces Thread #10 #2493989
    Bobo
    Participant

    Nepal Air Force М-28 Skytruck:
    http://spotters.net.ua/file/?id=2488

    in reply to: Small Air Forces Thread #9, for Pictures and Discussion. #2512807
    Bobo
    Participant

    Bulgarian Air Force:

    http://spotters.net.ua/files/images/0000001959_small.jpeg

    http://spotters.net.ua/files/images/0000001962_small.jpeg

    in reply to: Small Air Forces Thread #9, for Pictures and Discussion. #2514692
    Bobo
    Participant
    in reply to: Tornado vs Viggen #2675060
    Bobo
    Participant

    Viggen is a very interesting plane, it was one of the first plane, based of vortex aerodynamics. Americans and europeans were spending a lot of money on r&d in variable geometry wings; whereas swedes made relatively simple and cheap plane with better characteristics due to using vortexes generated canard wings.

    in reply to: Tu-160 Blackjack #2676140
    Bobo
    Participant

    Excuse me, propfans of course.

    in reply to: Tu-160 Blackjack #2676182
    Bobo
    Participant

    An-70 and A-400 are STOL cargo planes. And An-70 is equipped turbofans 🙂
    The priority in designing cargos’ is in takeoff/landing capacity, whereas long-range bombers are designed in priority in cruise flying.

    in reply to: Mig-21bis vs F-5E/F #2676778
    Bobo
    Participant

    I agree, the F-5 seems to be better in most of the ways. How did they both do in combat, against each other? I think they were involved in Iraq-Iran War and few other wars.

    One F-5E was captured by northern vietnamese and tranferred to the USSR to evaluation. There were several combats against Mig-21bis and Mig-23M, and F-5 won all combats. Source: Kondaurov, test-pilot of Mig.

    in reply to: Tu-160 Blackjack #2676846
    Bobo
    Participant

    Perhaps today, but in 1953? The mission was not crew comfort or structural qualities, but the ability to drop bombs on US soil.

    Yes, in early 50-s Tu-95 could be a forced decision. In 60-70s it put the brakes on development of modern heavy bombers and jet engines.

    The laws of aerodynamics changed from 1958 to 1979? 🙂

    No, they didn’t changed, and turboprops didn’t changed; but turbojets became more efficient than props. Choice of turboprops in 50-s was a fundamental fault.
    Props didn’a allow to use modern aerodynamic improvements, such as laminarization, using supercritical wing section etc. There are not any another swept-wing plane with props. Development of huge turboprops freezed investigations of jet engines in Soviet Union. All these factors were connected each others. There was a war of clans in soviet aviation industry after the ww2 finished. Tupolev won the war and became “The Czar Of Heavy Planes”.

    That is absolutely fascinating. If the decision was political, wouldn’t the turbojet B-52 make a more appopriate choice to copy? Especially after the proven experience of copying to build the Tu-4? What political reason could you possibly imagine that Stalin would want turboprops?

    Stalin didn’t want turboprops, he believed in intelligence reports about investigations in turboprops in Britain and US. He and Tupolev (of course) were sure that future heavy bomber in US would be turboprop. After the B-52 was uncovered, Tupolev had no choice but to insist priority of his conception. It was fortunate that in 1953 Stalin died, and Khruschev started “rocket hysterics”; he believed that missiles would replace military aviation. He didn’t consider necessary to develop new, more advanced bombers. He liked huge props, their sound and exterior beauty. You know, he was a bit irrational man. Tupolev became a boss of heavy aviation in USSR and he decided what to do. Tu-95’s were produced in an a lot of variants, they were adapted to different tasks, but the cardinal problem couldn’t be resolved. It’s a great sample of irrational soviet technical politics.

    Well! As much as I would disagree, it’s a pleasure to debate someone who can provide a nice book reference for a change… anyone who reads Russian can’t be all bad. 😀

    Excuse me, SwingKid.

    For my part I recommend Zaloga’s “The Kremlin’s Nuclear Sword” – very well written.

    Well, I have read some western books about soviet aviation. There were good books, but a bit naive 🙂

    in reply to: Tu-160 Blackjack #2677386
    Bobo
    Participant

    The wheel track of a 3M – with its outriggers at the wingtips – was MUCH wider that a Tu-95 !!

    Same as on a B-52.

    It would therfore require a WIDER runway/taxiway not narrower – unless the outriggers extend out over the grass ??

    In 60-x 3Ms used to land on fighters’ runways (operational dispersal). Bears couldn’t be based on such runways.

    You see — outriggers are on the grass.

    in reply to: Ka-60… again. #2677394
    Bobo
    Participant

    Development of Ka-60 virtually posponed because of lack of money.

    in reply to: Tu-160 Blackjack #2677421
    Bobo
    Participant

    It requires quite an imagination to say the U-2-like 3M planform, which was converted for use in a stratospheric research aircraft, has better “low-level capabilities” than the Tu-95 airframe, which was converted to hunt submarines.

    SwingKid, large turboprops couldn’t be more effective than turbojets. There are a lot of problems with turboprops — aerodynamics problems with wing airflow, vibration, acoustic load, structural strength. Choosing turboprops for heavy bomber was a great fault. There are no any another sweep-wings high-speed turboprops in the world.

    It takes an impressive bias to say that the bicycle 3M, which achieved a 30% self-destruction rate to catastrophic accidents in the first 3 years, has better “reliability” and “takeoff and landing characteristics”.

    What about Tu-95? 🙂

    … bicycle 3M …

    Bicycle gears allowed 3M to takeoff and land on short and narrow runways. A nose gear with two-position strut provided automatic takeoff with max. weights.

    But to say the turbojet 3M had greater range than the turboprop Tu-95 requires… a little more reading, to be polite. :rolleyes:

    Bear:
    Tu-95M, 1958 — (takeoff weight 182 t, 5695 kg bombs, V=720 (!) km/hour) — 13 200 km
    Tu-95KM 1962 — (takeoff weight 182 t) — 12 500 km.
    Tu-95MS 1979 — (takeoff weight 185 t) — 10 500 km.

    cruising speed — 720 km/hour.

    The range dropped as you see. A bit strange? If you studied aerodynamics you’d understand why.

    Ranges of 3M:
    M-4 1958 — 10.500 km
    3M 1959 — 12.000 km
    3ME 1963 — 13.000 km

    cruising speed — 900 km/hour.

    The true story is that when Stalin demanded a Soviet intercontinental jet bomber, Myasischev the fantasizer told the Soviet leader what he wanted to hear, while Tupolev insisted that Soviet turbojet technology was not yet sufficiently mature for such a task.

    Not at all. Tupolev followed the americans and britains investigations in large turboprops.
    http://www.globalsecurity.org/wmd/systems/images/mod_464-35.gif
    Historics in Russia consider this design was a source of future Tu-95.
    And I insist that development of Tu-95 has exceptionally political reasons.

    Tupolev enraged Stalin, but was respected because of his proven

    SwingKid, you don’t understand — Tupolev was a humble servant of every soviet leader. It was his role. “Tupolev enraged Stalin” — it’s a soviet fairy-tale.
    Tupolev has never enraged any leader. Never. They wanted turboprops — and Tupolev made turboprops. They wanted B-1 — Tupolev made soviet B-1, they wanted soviet Concorde — Tupolev made soviet Concorde. Tu-144 “Concordsky”. His career began with copying Junkerses.

    You read soviet aviation books and trust in that books. The real life was different.

    If you can read russian I recommend you to read this book. “Thorny path to nowhere” by Seliakov. Seliakov was famous designer, worked with Myasischev and Tupolev. Chapters 26-28 are about 3M and Tu-95.

    in reply to: Tu-160 Blackjack #2678808
    Bobo
    Participant

    Crew loved 3M and hated Tu-95. Vibrations, tiring pilotage, uncomfortable workpace, gas-laden atmosphere in the cockipt. One failed engine and unfeathered propeller caused roll and stall. There were no ejection seats in Tu-95, crew had to jump out through a trap in the nose gear well dome. If the gear failed crew died. If the engine failed during takeoff Bears go down, it can’t fly on three engines with max. takeoff weight. 3M could. It must be admitted that, the truth is that NK-22 is very reliable engine.

    So, retired 3M stir up old feelings…

    in reply to: Tu-160 Blackjack #2678925
    Bobo
    Participant

    This is a joke, right?

    The 3M’s life as a bomber did not end by its retirement, but rather by the conversion of the entire fleet into tankers, because the aircraft was too new to be thrown away, yet totally inadequate as a weapon

    It is not true that 3M was inadequate as a weapon. 3M was the best soviet heavy bomber; it was better than Tu-95 : speed, range, weights, takeoff and landing characteristics, low-level capabilities, crew, reliability. There was one weakness — Myasishev wasn’t as faithful to communist party as Tupolev was. The only technical problem was tandem landing gear — in time of early huge missiles and 20-tonn’s nuclear bombs. After the new generation of missiles and bombs were developed this problem solved. And long gear of Tu-95 became very inconvenient.

    People in west don’t understand situation in soviet military aviation and soviet politics on the whole. Soviet Union was a world of Machiavelli, it was world of plots and incompetence. You see on the pictures and think “what the great plane, what the great coaxial propellers! ” and you think that it’s the best soviet bomber. It wasn’t.

    in reply to: FROGFOOT Vs. A-10 Thunderbolt #2679516
    Bobo
    Participant

    bobo…
    i fail to understand…what’s your point?
    all stuff being said is known, payloads, flight parameters etc, are you comparing them with fighters? ’cause that would be wrong.
    or against each other? in that case the Su-25/39 has my vote anytime.
    please can you clarify? 🙂

    Camaro, planes are not simply payload, speed, range, armor etc. It’s a system. As a system the A-10 is better than the Su-25. Its technical parameters matches strategic concepts. The Su-25 doesn’t.

    Su-39 has extended range, ceiling and payload, but speed and rate of climb were decreased. Su-39 is an correction of conceptual mistakes.

    Did I clarify enough? 🙂

    in reply to: Tu-160 Blackjack #2679525
    Bobo
    Participant

    If it wasn’t good at launching missiles then why are they converting it to fire Kh-102 and Kh-101 missiles? ..the latter being conventionally armed cruise missiles.

    RusAF has no choice. Bears became out of date 30 years ago, 3M, the best soviet hevy bombers, were retired. Tu-160 undoubtedly is the best choice, but it’s necessary to upgrade all avionics and electronic warfare systems.

    Russians regret of retired 3M…

Viewing 15 posts - 1 through 15 (of 23 total)