Per teddybear99: 14. Fill in the blanks on this 1964 advertisement: A ______________ is a quiet bird. So quiet you can think. Or talk. Or listen to the Champagne fizz. Or even sleep, if you don’t mind missing the party. If you demand the full Audubon definition, a ____________ is ____________’s own special version of the great new T-tail ___________ fan-jet.

Tapping in with my answer: Whisperjet/Whisperjet/Eastern's/Boeing 727

Eastern is a very likely suspect but in this instance we're looking for an airline that markets its 727s as some type of bird, as in _____bird. All these guesses sound great, though. Keep plugging away, gang! As well versed as y'all are in these matters, you're bound to hit on the correct answer sooner than later.