Quote:
Originally Posted by paolomiana
everything true, but it generates in me another lot of doubts...
is it possible to gear a propeller of rotative engine?
another question is it really understood by WWI designers what is a climb/speed propeller?
I cosntantly hit this soft wall...... what is the real understendment of flight laws during WWI. Please could someone give me some references about the aerodinamic/structural technology level in 1914-18? and what is they way they use this informations
thanks
paolo
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Paolo, while is IS possible to gear a rotary engine (Siemens did it) that is not what I am referring to. Pitch acts somewhat like a gear ratio- think of a prop as a screw. Each turn of the prop advances it through the air by a given amount. A climb prop will have less pitch than a cruise prop, (And they are usually longer) A cruise prop will have more pitch, but be shorter in length. The cruise prop, due to more pitch, will move the aircraft faster, because it moves further through the air with each rotation... but, will not have as much thrust. It is all a trade-off.