Nagler-Rolz Flugzeugbau
With the outbreak of war, Nagler joined with Franz Rolz to form the Nagler-Rolz Flugzeugbau.
The new company built a helicopter similar in configuration to the RI and RII. This ship had an empty weight of 700 pounds and though it was flown in hover, it could not be lifted out of ground effect. With the coming of World War II, the company received contacts from the German Government for the development of small single-seat helicopters.