Instrument Departure Procedure
A preplanned instrument flight rule (IFR) departure procedure published for pilot use, in graphic or textual format, that provides obstruction clearance from the terminal area to the appropriate en route structure. There are two types of DP, Obstacle Departure Procedure (ODP), printed either textually or graphically, and, Standard Instrument Departure (SID), which is always printed graphically.
Aero Linx: What Makes Paper Airplanes Fly?
What makes a paper airplane fly? Air — the stuff that's all around you. Hold your hand in front of your body with your palm facing sideways so that your thumb is on top and your pinkie is facing the floor. Swing your hand back and forth. Do you feel the air? Now turn your palm so it is parallel to the ground and swing it back and forth again, like you're slicing it through the air. You can still feel the air, but your hand is able to move through it more smoothly than when your hand was turned up at a right angle. How easily an airplane moves through the air, or its aerodynamics, is the first consideration in making an airplane fly for a long distance.
“Proving flights will involve our crews operating flights between Honolulu and Lanai and Molokai without passengers, just with FAA observers, making sure we do everything to their satisfaction."
Source: Ohana by Hawaiian managing director Hadden Watt, discussing a planned inter-island turboprop subsidiary of Hawaiian Airlines that has resumed the FAA certification process after being delayed by sequestration and what was described as a "lack of FAA resources."
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