The "Armoured Aerosan (Tunguska type)" was not the largest and most ambitious project. TsKB-1, headed by B.I. Levkov, proposed an armoured aerosan hovercraft in the spring of 1941. Its advantage was that it could travel across swamps, rivers, ice, and snow, not only in the winter, but also in the summer.
Sadly, no sketches of the design were preserved, but the overall specifications made it clear that this was a continuation of Levkov's hovercraft design. The three-man 8-9 ton vehicle would be equipped with two M-62 aircraft engines and have the same armament as the 02SS aerosan.
TsKB-50 representatives supported Levkov's proposal, but B.N. Yuryev and A.A. Arkhangelskiy, engineers representing the NKAP, criticized the proposal. According to calculations, the design was expensive (development and construction would cost 1.5 million rubles), the engines were poorly protected from Molotov cocktails, and were also rare and expensive. Simple logic dictated that a reconnaissance vehicle that cost as much as three KV-1 heavy tanks was excessive. Nevertheless, a draft decree for the development and construction of the aerosan was prepared. Two prototypes with different armament would be built at factory #445 in Moscow.
Requirements for a more humble vehicle were composed in parallel. Its mass was 3.5-4 tons, the crew, armour, and armament were the same as that of the TsKB-50 design. However, work did not proceed past the design stage. The start of the Great Patriotic War required new simpler and cheaper ways of equipping the Red Army with patrol aerosans.