He followed this with numerous articles on the subject of space travel, with titles like "Berlin to New York in One Hour" and "A Daring Trip to Mars".

In 1928 and 1929, he worked with Fritz von Opel on a number of rocket-powered cars and aircraft within the world's first large-scale rocket program Opel-RAK.

Valier's and von Opel's activities led to land and rail vehicle speed records, and eventually to the world's first rocket plane.

On 19 April 1930 Valier performed the first test drive of a rocket car with liquid propulsion, the Valier-Heylandt Rak 7.

Max Valier is still remembered in South Tyrol as one of the most famous inventors and scientists of this province, and a number of institutions bear his name: