CONDENSATION TRAIL (CONTRAILS)
CONTRAILS ARE CLOUDS WHICH FORM IN THE WAKE OF AN AIRCRAFT
WHEN THE ATMOSPHERE AT FLYING LEVEL IS SUFFICIENTLY COLD AND HUMID.
A TYPE OF CONTRAIL DIFFERENT FROM THAT DESCRIBED ABOVE AND WITH A MUCH SHORTER LIFE
SOMETIMES DEVELOPS AS A RESULT OF EXPANSION IN EDDIES FROM PROPELLER AND WING-TIPS.
