Twelve or thirteen years after the MAN cover World War II had come and gone. The German V-1 "Buzz Bomb" with the pulse jet was well known and immediately after the war a "hobby version" was under way by several individuals. Most popular of all was the Dyna Jet, shown in the picture.

The sound was a lease-breaking 200
Hz  roar with volume as great as an air raid siren. Only a teen age boy could love it. Dick Olson, a kind of 'boy inventor' in Omaha at that time, made a free flight model with one. After the picture above was taken, he managed to get the engine started. (The Model A spark coil is in the box at the left). The aircraft slithered across the grass and rose very slowly. It flew for perhaps 20 seconds. Th engine quit, nose dropped and within a few more seconds it hit the telephone wires and fell to the ground.

Photo - Benson Park, Summer of 48