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
Vanilla production in French Polynesia Vanilla production in French Polynesia Vanilla production contributes to the local economy of French Polynesia. Although it was a major export crop after its introduction by the French in 1848, vanilla is no longer a significant export product. Vanilla was first introduced to French Polynesia by French colonizers as an export crop. Later, it became an important cash crop in the development of the island's economy. In the early 20th century, production was much greater than it is today, with 150-200 tons produced annually and plantations employing a sizable percentage of the population. Over the years, its production has been