It is the Ukrainian Physical Technical Institute, a collaborator of KB-7, the design bureau that produced rockets such as the R-03, R-04, R-05, etc.

“R-03 and its M-3 engine”

“UFTI R-04”

The R-04 also ran on liquid fuel, measuring 16 cm in diameter and 110 cm tall, and had a thrust of 45 kgf.

The R-05 had a liquid-fueled main engine, while two other boosters were solid-fueled. See the below figure for details.

“The R-05 and its M-29e main engine”

-The R-06 (ANIR-5) ran on liquid oxygen and alcohol.

“R-06 (ANIR-5)”

“M-17 Engine”

The M-17 engine was designed at KB-7 and used gunpowder in the first stage, functioning as a solid-fuel rocket. Once the chamber pressure was depleted, liquid fuel entered and continued combustion. This was a Zuyev project.

The R-07 rocket was solid-fueled and used for stability tests, confirming that adequate results were obtained with the use of appropriate stabilizers.

The R-10 rocket was a two-stage rocket that combined a larger vehicle and an R-05 rocket in its nose.

Interestingly, all the designs predate 1940.

“R-10”