I wonder why neither Alexey nor Andrzej didn't mention ZIL-112S has never been called The Blue Rocket. It had various colour schemes (based mainly on white or red) but never was painted blue. In fact the car nicknamed ''Golubaya Raketa'' was the very first ZIS-112 (ZIS was the name of ZIL factory before 1956) from 1952 (picture below), not only because of its sky blue colour but also due to unusual aerospace body style. Not very original in fact as it was a more massive and less elegant copy of the 1951 Buick Le Sabre concept car designed by Harley Earl who was impressed by F-86 Sabre jet fighter shape.

ZIS-112 as driven by Boris Kurbatov and Vladimir Tamakhin at the 1952 USSR Championship. IMO it was rather The Blue Locomotive!
The project ''112S'' started in 1960. It was high performance sports car powered by modified limo engine. Vasily Rodionov (b. 1909, d. 1992), ZIL chief designer in 1942-1973, made the car lighter and smaller than any of its predecessors. Body design was inspired by Ferrari 250 TR ''Testa Rossa'', a really good choice, but its shape was too complicated for accurate reproducing so in general ZIL looked like a mix from some contemporary European sports cars. The first 112S chassis was finished in early autumn 1961, the second one appeared one year later. Well thought-out cinematic of suspension, proportional weight distribution, changable gearbox ratios, powerfull engine, four-wheel disc brakes provided the car very good performance / handling abilities and made the 112S the fastest Soviet sports car ever.
Some technical specifications for each of two built 112S chassis (incl. data of SRA version) can be found at
this webpage.
Below are some contemporary photos I've found in my archive (click to enlarge).

Chassis no. 1

Chassis no. 2

Both cars together (left – no. 1, right – no. 2). A man in the hat presented on both photographs is Sergey Glasunov, head of ZIL sports car division.
Speed record attempt on Baskunchak salt lake.
First photo: mechanic Pavel Kolesnikov at the wheel of streamlined ZIL-112S.
Second photo (left to right) : Sergey Glasunov, mechanics Pavel Kolesnikov and Jury Kuzyakov.
Third photo (left to right) : driver Gennady Zharkov, Jury Kuzyakov, Sergey Glasunov, Pavel Kolesnikov.
Fourth photo (left to right) : Sergey Glasunov, Gennady Zharkov (at the wheel), Pavel Kolesnikov.
Another shot I have was taken a bit later, probably in the 70s:

Again chassis no. 2. Turning indicators and number plates make clear the car has been allowed to road use! What is beyond me why it was registered at Voronezh (note BPH letters on a plate), far away from Moscow. Was it sold to a non-works team or even to a privateer?! I wonder if anyone's able to enlighten this?

Finish at the Rigas Motormusejs. It's the same 112S as in the previous photo, painted red (shot was taken in 1998). If they own two cars they can change them from time to time so it explains what Tarmo said.
P.S. Rainer, could you please indicate in which magazine you have found those photos in your first post to this thread? Was there some extra information?