The Inventor’s Journal

Dr. Bertelsen's keeps a comprehensive journal about all his invention work, written as his inventive work proceeds . That journal encompasses thousands of pages. We present here some excerpts from the notebooks. The excerpts we’ve chosen reflect the key realizations he developed about each of his technology and to show the numerous challenges that had to be overcome.

For each excerpt, the original handwritten notes are show, along with a typed transcription, to aid readability. At the end of each section are relevant photos that Dr. Bertelsen included in his notebooks

Work Directly Leading to the Development of the Gimbal Fan Concept

During the period 1965 to 1967, Dr. Bertelsen began to investigate the use of shrouded fans to allow more controllability for his craft. Up until then, his previous vehicles could would not behave fully as the pilot wanted, and the lack of control prevented him from attempting to sell them.

Starting in April of 1965, Dr. Bertelsen developed three models, the A-10, A-11, and A-12, each of which brought him one step closer true controllability. This work led over time to the Gimbal Fan he utilized with his A-13 craft. 

Aeromobile A-10

Aeromobile A-11

Aeromobile A-12

Aeromobile A-13

Last update: July 29, 2008