The locomotives developed on the basis of the policy issued by Garbe were characterised above all by good performance and simple construction. Consciously, he did not strive for high performance with his designs, but gave priority to reliability and ease of maintenance. By the time Garbe retired, a total of 13 superheated steam locomotive classes had been developed along those lines for all the important locomotive duties, together with a number of experimental designs. Garbe's design fundamentals had been so much part of Prussian locomotive development that they continued to be used even after his retirement. The
Prussian P 8 symbolises to a great extent Garbe's design principles. A total of 3,948 examples were built (including the Rumanian copies) and they were working German railway routes until the end of the steam era around 1972–1974. Garbe's major achievement in the field of technical steam locomotive development was the introduction of
superheating, for which he was a keen advocate. He disapproved of
compound working; he saw superheating as a total replacement for complicated and maintenance-intensive compound systems, not as an enhancement of them to produce increased power. The most significant acknowledgement was granted to Garbe after he left the service of the state. The
Technische Hochschule in Charlottenburg (now
Technische Universität Berlin) awarded him an Honorary Doctorate of Engineering for his services in developing the superheated steam locomotive. He died on 23 May 1932 in
Berlin. ==References==