Air density is a parameter which varies according to temperature, altitude, atmospheric pressure and air humidity. The lower the air density, the more the engine (propeller) performances are diminished.
Under such conditions, the take-off or landing distance can be multiplied by up to a factor of four. The same applies in flight for the speed and rate of climb, which can find themselves radically reduced.
Exact knowledge of this parameter is therefore essential for obvious safety reasons. Borrowing the two-directional rotating bezel mechanism from its predecessor, Aviator II gives the air density in a single manoeuvre. This new application is also covered by an international patent. The 44 mm-diameter stainless steel case and bezel are covered in vulcanised rubber to improve grip. The Aviator II has a self-winding mechanical movement which indicates hours, minutes and seconds.




Source: Europa Star October-November 2009 Magazine Issue