Invar: A nickel iron containing 36 per cent of nickel. It has an exceedingly low rate of expansion and has a high resistance to water corrosion.
Invariably, the question comes up as to how much ice a particular non-approved aircraft can carry. The answer is, no one knows because it has never been tested. Without an approved icing package, you become the test pilot.
Student cross countries don't necessarily prepare a student for the real world because they are invariably selected by the instructor to make it easy on both the student and the instructor.
The problem that Juan encountered was that as his gyroplane would start to fly, it would invariable roll to the left and crash. Models he built using lightweight rotors did not experience this.
Multi-mission aircraft of the past have invariably had to make design sacrifices in one area or another, never really coming close to becoming true flying Swiss Army knives.
OFFSET
Part of received data that is undesired, consisting of a random, time-invariant term added to a signal; Synonyms: bias; Compare: noise, signal
OH
Overhaul ...
 See also: Aircraft, Pilot, Aviation, Flight, Plane
  
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