Talk:Kuznetsov NK-12

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Only one turbine

The NK-12 is definitely not driven by two turbines. The 2-turbine version was an attempt to double the power of the engine NK-4 in a simple way. In my sources the NK-4 prototypes are called engine 022. The 2-turbine engine, derived from the NK-4, is named 2TV-2F. After a Tu-95 crashed on May 11th 1953 that was equipped with 2TV-2F, the double-turbine project got cancelled and the development of the (aircraft powered by the ) NK-12 began. Unfortunately, all my sources are german-speaking. But it would be possible to use them here if desired.--Thuringius 15:24, 26 May 2007 (UTC)[reply]

Soviet-developed alloys

On 19 September 2008, anonymous editor 77.127.59.25 added the phrase "(actually British Nimonic)" to the last sentence in the second paragraph. I seem to recall that the leftist-infiltrated British government did some politically stupid things in the 1940s, giving the Soviets some key material technologies, without which the Soviet development of jet engines and rockets would have permanently lagged behind the West. I haven't been able to find a reference, but I may have heard this factoid some years ago while watching a History Channel documentary. If true, the parenthetic statement about Nimonic should replace the dubious claim of the engine alloys having been developed by the Soviets. —Quicksilver^{T @} 20:38, 1 December 2008 (UTC)[reply]

The 'leftist' British government under Clement Atlee allowed the export of certain Rolls-Royce jet engines - the Derwent and Nene - to the Soviet Union in September 1946 before the Cold War had started and with the proviso that the Soviets would not use the engines for military purposes. That the Soviet Government under Stalin was unscrupulous and not likely to honour such legal agreements - never mind produce illegal 'pirate' copies - was not widely known in the West at the time, and many still regarded that country as an 'ally' as it had been during WW II. Subsequent events over the next few years were to disprove this latter assumption however.

BTW, the UK also provided the Nene to the US where it was produced (legally) as the P&W J42 Turbo Wasp. — Preceding unsigned comment added by 95.148.220.13 (talk) 12:08, 1 November 2015 (UTC)[reply]

thrust and off-heat?

which thrust does the engine develop at zero speed? and how hot would the mixed off-stream roughly be say at a distance of 5 m from the outlet? can one roughly give a ratio of thrust to weight or specific thrust-weight for turboprop-engines? thanx? --HilmarHansWerner (talk) 08:48, 2 January 2016 (UTC)[reply]