If by "friendliest", you mean most comfortable, the Boeing 747 in its Upper Deck Lounge configuration has the widest aisles, most leg room, and most comfortable seating. First class in a 747 is the equal or better of any existing passenger aircraft.
The correct answer to this riddle is a hello-copter
Darrol Stinton has written: 'The Design of the Airplane' -- subject(s): Airplanes, Design and construction 'Flying Qualities and Flight Testing of the Airplane (Aiaa Education Series)'
E. J. Craine has written: 'Holidays on the ranch' 'Conquistador' -- subject(s): Fiction 'Airplane Boys in the Black Woods (Airplane Boys Series)' 'The victors' -- subject(s): Fiction, History 'Pharaoh's knob ...' 'Airplane Boys at Belize' 'At Platinum river'
Man, this joke's odd. Me!
because they all died
Then there will be 1000 baseballs that will hit the ground.
Spelt airplane wrong. And its any WWII fighter aircraft.
A hellocoptor
the airplane with the most fuel
The noun form is friendliness (for friendly, friendlier, or friendliest).
He was the friendliest, jolliest mailman we'd ever had.
A dog is the most friendliest pet
a kind of airplane
Depends on the kind of airplane.
The African country that is the friendliest towards Americans is Liberia.
The kind that flies.
The airplane is a Fairchild C-123K Provider.
I guess it is