Proton K

Proton K lifts off from Baikonur

Project home: Proton K at CCCP Fleet Author: David Henderson, Alex vH, Dennis Krenz Current version: Unknown Compatibility: Unknown

The Proton K is the three-stage version used for lofting 20-tonne payloads to 51-degree LEO. Salyut, Mir and the ISS Mir Core have all been lofted via Proton K.

CVEL-based GPDS support enables addition of a fourth stage (such as the included Fregat) for heavy GTO missions or indeed moonshots as a four-stage version was used for the Soviet circumlunar man-capable flights.