In 1941, Friedrich von Doblhoff (1916-2000) a junior engineer at Wiener Neustädter Flugzeugwerke (Vienna-Neustadt Aircraft Factory, which assembled Bf 109 …

For the German Navy, facing war without its own aircraft carriers, the helicopter seemed promising as an observation platform and …

After Focke’s Fa 61 experimental helicopter (described in Part 1) proved stable in flight and reliable in service, in 1938, …

Nature devised the rotary wing as a way to disperse tree seeds on the wind.  Generations of daydreamers, observing the …