It is a low cost orbital launch vehicle from the early 1970's.

-The project was started by order of the German Ministry of Science and Technology to the company of Lutz Kayser, winner of the contract. The project ended around 1985 under pressure from the German government by the Soviets and French.

“Otrag carrier and an element”

-The vehicle itself is a "cluster" of 4 rockets with 2,750 Kgf liquid fuel engines.

-The fuel tanks are pressurized.

-The fuels were Kerosene and N2O4 mixed with NHO2 as oxidants.

From Appendix 6: See main text for understanding the bunch rocket motor system with the formula described below.

"Otrag feeding system"

"Otrag and its direct equivalents"

-The Otrag project is a private initiative and in the graphics they are identified with a white dot above them.

"Continuation of the comparative charts"