Tonka (fuel) Tonka (fuel) Tonka (also TONKA-250 and R-Stoff) is the name given to a German-designed rocket propellant first used in the Wasserfall missile; it has also more recently been used by North Korea but found its greatest applications (under the name TG-02) in the Soviet Union, for example, in the propulsion projects of the A.M. Isayev Chemical Engineering Design Bureau. Its name is a reference to the tonka bean; as it was invented during the Second World War, it has no connection to the similarly named toys. Its composition is approximately 50% triethylamine and 50% xylidine, with the most common oxidizer
Tonka Obretenova of Bulgaria, was established by her son Nikola Obretenov, in her house. Baba Tonka buried Stefan Karadzha, and managed to preserve his skull. Her sons Angel, Petar, Nikola, and Georgi () took part in different detachments and were killed, or sent into long exile. Her younger daughter, Anastasiya (Анастасия; also called: Siya, Сия) married Zahari Stoyanov — a revolutionary, writer and publicist. Baba Tonka Cove in Livingston Island in the South Shetland Islands, Antarctica is named after Tonka Obretenova. Tonka Obretenova Tonka Obretenova (), known as Baba Tonka (Баба Тонка), was a female Bulgarian revolutionary, born in 1812, probably in