Our heavyweight helicopter equal in the world does not have
In Rostov started production of the most load-lifting rotary-wing car The Russian holding «Helicopt[...]
Invisibility of the atmosphere
Air is invisible, and this fact in itself makes flight difficult to understand. When a ship passes through water we can see the ‘bow wave’, the ‘wash’ astern, and all the turbulence which is caused; when an aeroplane makes its way through
air nothing appears to happen – yet in reality there has been even more commotion (Fig. 2.1).
If only we could see this commotion, many of the phenomena of flight would need much less explanation, and certainly if the turbulence formed in the atmosphere were visible no one could have doubted the improvement to be gained by such inventions as streamlining. After some experience it is possible to cultivate the habit of ‘seeing the air’ as it flows past bodies of different shapes, and the ability to do this is made easier by introducing smoke into the air or by watching the flow of water, which exhibits many characteristics similar to those of air.
