In World War 2 commercial planes were used to transport troops, deliver cargo and move the President to places (and Elinor Roosevelt too). A Presidential plane was developed but I can't remember if it was as early as World War 2. World War 1 planes had not developed enough to have commercial large transport planes yet. The commercial planes also helped to free up the large military transport planes for other uses. The train however was still the main source of mass transportation in that era in the United States.
Planes
Korean Air Lines.
It was to transport people rather than freight just like the Santa Fe Trail.
The Hindenburg disaster ended rigid airship aviation for commercial purposes, and since then no zeppelin has ever been used to transport passengers or cargo.
Don't know about '68, but Braniff and TWA were doing it in '69, and later.
For each chemical compound exist special rules for air transport because some are dangerous.for safety purpose
It was a Lockheed Vega 5B:Seven-seat passenger transport version, built for higher gross weight operations with commercial operators.
commonly it is a jet plane
The price of airbus commercial plane is 337,500,000 US dollars.
The biggest Airbus is the A380-800. The longest Airbus is the A340-600 which is 247 ft 1 in long (the A380 is 240 ft).
Road transport is better than air transport because they can bring the products directly from the manufacturer to the purchaser, whereas in air transport there are lots of transfers from plane to truck and from plane to plane.
bearer plane is responsible for the transport of the actual payload.
This would depend entirely on the country from which the commercial plane was flying.
An-225 transport
transport by truck, ship or plane would require energy.
A plane
By plane.