One of the amazing sights at Monino.

This very rare and unusual bird was nicknamed "Homer" by the NATO and is by far one of the most exotic aircraft ever to have passed through the airport. It was accompanied by Mil Mi-8 CCCP-11097, both aircraft on their way to the Le Bourget airshow. Because they were not allowed to fly over West Germany (Cold War issues), they had to re-route via Denmark and also The Netherlands to take on fuel. This is the first prototype, which ended up stored / preserved at the MVZ im. Milya factory at Tomilino, and was still there by late 2018. The one on display at Monino since 1975 is the second prototype. Initially it carried no registration there, but in 2012 they falsely painted it with the registration of this first prototype.

The second of two Mil V-12 prototype helicopters, powered by four Soloviev D-24VF turboshaft engines. This aircraft first flew in March 1973 and was given to the Monino Museum in 1975, after the cessation of the development programme in 1974. It went on display as seen here, without a registration. Unfortunately in 2012 it was made to look like the first prototype by falsely painting it with that helicopter's registration CCCP-21142. The registration with which this second prototype actually flew during its operational life is unknown.

The Mil V-12 (NATO reporting name Homer) is the largest helicopter ever built and this example is the second prototype and last built of the type (sometimes incorrectly quoted as c/n 002). In 1975 it went on display at Monino without any registration (actual operational registration is unknown). In 2012 it was falsely painted as seen here, with the registration of the first prototype (which was still preserved at the MVZ im. Milya factory at Tomilino by 2018).
Both prototype V-12s outperformed their design specifications and set numerous world records which still stand today, Despite these achievements the Soviet Air Force refused to accept the helicopter and all development on the V-12 was stopped in 1974.

One of only two examples completed of this ultra large helicopter (plus one incomplete static test airframe). It wears Paris Air Show code H-833. This is the first prototype, and it was later stored / preserved at the MVZ im. Milya factory at Tomilino, and was still there by late 2018. The one on display at Monino since 1975 is the second prototype, which in 2012 was unfortunately and confusingly painted with the same registration.