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KALININ’S K-12: WIN SOME, LOSE IT ALL
KONSTANTIN KALININ WAS A SOVIET AIRCRAFT DESIGNER. His designs were unconventional, which made them controversial during the Stalin era—and also, in retrospect, interesting projects for my GMax hobby of building aircraft for use in Microsoft Flight Simulator FS9.
My GMax rendering of an earlier Kalinin, the colossal K-7.
Kalinin’s giant K-7 probed the limits of my staring at a computer screen as I figured out GMax details. Seeking relief after its completion, I traded aircraft ungainliness for unorthodoxy of the K-12, Kalinin’s flying-wing aircraft.
Origins. Kalinin began his K-12 rationally enough with models and a half-scale piloted glider version that first flew in 1934.
Kalinin’s piloted glider. Images from j2mcl Planeurs.
The full-scale craft was intended to be a bomber, though Kalinin tried covering his bets with Soviet authorities by imagining it as a passenger craft as well.
Development. The craft initially became heavier with each iteration, then lighter as elements such as bomber hardware and armament were omitted. Originally to have a licensed variant of the Wright Cyclone, more powerful engines were also assayed. The final design had twin Shvetsov M-22 nine-cylinder air-cooled radials; these, licensed versions of the British Bristol Jupiter originally designed in late World War I.
Then the Tale Gets Complicated. The Wikipedia entry for the Kalinin K-12 is brief: It recounts, “A subscale glider to test the K-12’s features flew in 1934, piloted by V.O. Borisov. The K-12 flew in autumn 1936 and was demonstrated at Tushino in August 1937. The full-size K-12, however, was cancelled after Konstantin Kalinin was arrested and executed as an enemy of the state.”
More details are found here and there around the Internet. In 1933 Kalinin submitted three proposals to the VVS Scientific Test Institute. One was conventional, another was a twin-boom design, the third was tailless.
Image above from airpages.ru.
Gee, I wonder who influenced whom: See the Belyaev DB-LK, an earlier GMax project of mine. The calendar suggests Kalinin as the innovator, Belyaev as the follower. And a fat lot of good it did either.
Above, my rendering of the Belyaev DB-LK “Batwing.” Below, the Kalinin K-12.
On, Then Off, Then On Again. Then a Major Off. The prototype K-12 flew in July 1936. Its pilots gave it at best a mixed review. In particular, poor aerodynamic control was noted. The project was cancelled, then revived in 1937 by invitation to a Moscow airshow. This time around, the K-12 was given a bizarre livery and called жар-птица, Zhar-Ptitsa, “Fire Bird.”
The K-12 in Fire Bird livery. Image from Wikipedia.
Kalinin was encouraged to divert part of his attention—and production facilities—to a batch of 10 more K-12 prototypes. Alas, this led to his being investigated for “manipulation of state resources.” On October 22, 1938, Stalin had Kalinin arrested, sentenced, and shot. Or maybe, say other Soviet sources, he was shot as a spy in 1940.
Either way, it was законченность, fini, the end of Kalinin’s tailless aircraft. Until I stumbled on a three-view when researching Kalinin’s K-7.
GMax K-12 Notes. The K-12 made use of earlier GMax elements, including pilot and gunners (the latter, articulated by the “tick18” prefix of GMax coding intended for beacon movement).
Above, the nose gunner/bombadier. Below, the pilot.
An oddity presented itself in the K-12’s dual rudder articulation: They work normally when the craft is standing still, but exhibit barely perceptible action (visibly or dynamically) when the K-12 is at significant speed.
Above, stationary; below, at speed.
I’m forced to use GMax’s default name-based coding; this, because of conflicts between the latest Microsoft Windows and my relatively ancient GMax software. I wonder if the rudders’ unorthodox placement relative to the craft’s center-of-gravity has some corrupting effect on the software’s built-in flight-dynamics engine?
All in good fun with an extremely enjoyable time-gobbling hobby. ds
© Dennis Simanaitis, SimanaitisSays.com, 2025
Simanaitis Says 
These are a small fraction of an almost unknown, but innovative and prolific designer. His early advocacy of flying wings without the efficiency robbing stability elements are only really being exploited today. His promise was cut short by Communist Socialism. These political purges are seldom covered in the West.After the February Plenum of the Central Committee of the CPSU in 1937, a wave of repression swept the defense industry. An action plan began to “expose and prevent sabotage and espionage.” In aviation factories, design bureaus and research institutes, terror began. Almost all the leaders of the CAHI (Central Aerohydrodynamic Institute of Zhukovsky), famous aircraft and engine designers R. Bartini, V. Myasischev, I. Eman, B. Petlyakov, J. Tomasevic, V. Charomsky, V. Chizhevsky, brothers Ivan and Andrei Kasyanenko and others were arrested.
Konstantin Kalinin developed a large number of highly successful and varied aircraft, yet was tried with no evidence and expelled from the party in April 2, 1938. On 22 October as the “enemy of the people” he was abruptly convicted “for undermining Soviet aircraft” and of aiding the Russian Fascist Party. The next day, he was shot.
Many were graduates of Kiev Polytechnic Institute, and Stalin loathed Ukrainians. Today at KPI figure Konstantin Kalinin is alongside other pioneers of Air and Space – Igor Sikorsky, Alexander Mikulin, Dmitry Grigoryevich, Ivan and Andrei Kasyanenko, Arkhipov Liulka, Sergei Korolev, Vladimir Chelomey, Lev Lyulev and many other prominent Kyiv Polytechnics who suffered similar fates. For some reason, Ukrainian Oleg Antonov escaped the purging. Sikorsky managed to move West ahead of the purge threat.
In 1972, after the death of Igor Sikorsky, also stricken out of Russian history, a prominent Soviet engineer, academician I. Artobolevsky said: “Here there were two great aircraft designers – Igor Sikorsky and Konstantin Kalinin. The first America buried as a national hero, and here nobody knows the second one.”
On 21 October 1937 during the Great Purge, the outstanding aircraft designers Andrei Tupolev and Vladimir Petlyakov, together with the entire directorate of the TsAGI, were arrested on trumped-up charges and accused of working for French Intelligence or charges of sabotage, espionage, and aiding the Russian Fascist Party. Many colleagues were executed without trial or hearing.
In 1939, Tupolev was moved to an NKVD sharashka which was dubbed “Tupolevka” after its most prominent inmate. Tried and convicted to a ten-year sentence, he developed the highly important Tupolev Tu-2. Tupolev was released in 1941 with the German invasion to “conduct important defense work” but was not fully rehabilitated by the state until 1955, two years after Stalin‘s death.
Tupolev designed or oversaw the design of more than 100 types of civilian and military aircraft over 50 years, setting 78 world records. Tupolev was highly honored in the Soviet Union, receiving just about every major award, and the Soviets love gaudy awards.
In 1939, Vladimir Petlyakov was moved from a prison to an NKVD sharashka where many ex-TsAGI people were sent to work. He was given the task of designing a high-altitude fighter, which he successfully accomplished. The resulting aircraft, the Pe-2, which went into serial production at the Kazan Aviation Plant, proved to be one of the most successful designs of World War II. He was killed in a Pe-2 crash.
in October 1929, Nikolai Polikarpov and around other 450 aircraft designers and engineers were arrested on fabricated charges of sabotage and counter-revolutionary activities, after which he was sentenced to death. After two months of waiting for execution, he was transferred to a Special Design Bureau of OGPU set at Butyrka prison and the sentence changed to 10 years of forced labor at Central Design Bureau 39 (TsKB-39) After a successful demonstration of the new I-5 design, the sentence was changed to a conditional one, and in July 1931 he was granted amnesty. In August 1939, Polikarpov fell out of favor with Joseph Stalin and as a result, in November 1939 when was sent to tour Germany’s aviation works, his plant director and chief engineer, along with design engineer Mikhail Gurevich put forth a proposal based on Polikarpov’s new fighter, the I-200, and received approval to create a new Design Bureau under the leadership of fellow political toady Artem Mikoyan, whose brother Anastas Mikoyan was a senior politician under Joseph Stalin.
https://vvsairwar.com/2016/10/20/aviation-design-in-the-gulag-and-the-development-of-the-tu-2/