Metal tag of launch vehicle rocket Energia prototype technological object 11K25 No. 5S.

During the pre-launch preparation this tag was attached to the one of the element of the rocket, that was removed before the launch. It has the part manufacturer’s ID number and the flight number. The total length is 9” long. The metal triangle tag size 2” x 2” x1”. Red fabric ribbon worn out. An extremely rare survival.

Some information:

Product 11K25 No. 5S technological model was used for complex testing of the operability of the units of the super-heavy lift launch Rocket Energia central unit under conditions of fire launch of oxygen-hydrogen engines.

To ensure readiness for preparation and launch of the Energia LV (11K25 No. 6SL), joint combat crews of military units and industrial enterprises performed tests.

The first launch of the propulsion system of the central block was unsuccessful due to the failure of the liquid hydrogen booster pump of engine No.1.Only the presence of an emergency protection system as part of the Rocket Launcher automatic control complex, which ensured an emergency shutdown of the engine No. 1 in 2.58 s after its start, excluded an explosion at the launcher of product 11K25 No. 5C, filled with 100 tons of liquid hydrogen and 650 tons of liquid oxygen.

After the emergency shutdown of the engine No. 1, the combat crew, which had accumulated considerable experience of actions in emergency situations during the complex exercises and previous work, carried out the draining of the MCT from the tanks of the central unit of the launch vehicle and performed high-quality and safe work to bring the product to its original state.

For the first time in the practice of field tests, control test engineers, combat crew for the preparation and prevention of remote control, together with the designers of the chemical automation design bureau and specialists from the Voronezh Mechanical Plant, carried out repair and restoration work on an oxygen-hydrogen engine without removing the 11K25 No. 5C product from the starting device, which was confirmed reusability of the engine, its maintainability, high qualification of the combat crew.

The second launch of the propulsion system of product 11K25 No. 5S was carried out with the duration of the propulsion system at 390 seconds. without remarks.

It should be said that the successful launch of the remote control was completed at 23 hours 55 minutes. April 25, 1986, and after 10 minutes. at 0 o'clock 05 min. the Chernobyl tragedy occurred: a thermal explosion and depressurization of the reactor, followed by radiation contamination of significant areas of Russia, Ukraine, Belarus.

Comparing these significant events from the point of view of emergency consequences (a rocket explosion on the UKSS launching device could lead to material damage in the amount of several hundred million rubles in 1984 prices and a delay of several years in the creation of a reusable space system).

The unique and extremely rare survival artifact.

The letter of authenticity will be included.

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