The Beechcraft Travel Air was a twin-engine development of the Beechcraft Bonanza. It took the fuselage of the Bonanza and the tail control surfaces of the T-34 Mentor. In later production the tail control surfaces were replaced with those of the Beechcraft Debonair and it was renamed the Baron.
Passenger aircraft with fewer than 20 passenger seats are called commuter aircraft or air taxis, depending on their size, and engine and seating configurations (the Beechcraft 1900, for example, has only 19 seats so that it will not qualify as an airliner and may be operated under less strict requirements in most countries).
While piston engines were common on propliners like the Douglas DC-3 until the beginning of the jet age, nearly all modern airliners are powered by turbine engines, either turbofans or turboprops, since they operate efficiently at much higher altitudes.
Well-known and memorable airliners history include the DC-3; the Concorde (operated 1976–2003, by two airlines only, British Airways and Air France, and capable of flying at twice the speed of sound); the Boeing 747 "jumbo jet" (from 1968 to 2005 the only airliner with two passenger decks); and the Boeing 707.
Airtravel has become so commonplace today, that many persons think of it as routine as taking the bus was in years past.
However, particularly on longer flights, airtravel may pose some discomforts to be aware of.
If you are traveling internationally, you should be aware that, in some countries, aircraft passenger compartments are sprayed with insecticide while passengers are on board.