C-127 was the designation for a proposed, large, turboshaft

Turboshaft

A turboshaft engine is a form of gas turbine which is optimized to produce free turbine shaft power, rather than jet thrust...

-driven transport aircraft

Aircraft

An aircraft is a vehicle that is able to fly by gaining support from the air, or, in general, the atmosphere of a planet. An aircraft counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines.Although...

 to have been built in the early 1950s by the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 aircraft manufacturer Boeing

Boeing

The Boeing Company is an American multinational aerospace and defense corporation, founded in 1916 by William E. Boeing in Seattle, Washington. Boeing has expanded over the years, merging with McDonnell Douglas in 1997. Boeing Corporate headquarters has been in Chicago, Illinois since 2001...

 for use by the nation's military forces. The project was canceled at an early stage. No aircraft were built.

The original C-127 designation was given to a number of De Havilland Canada DHC-2 Beaver

De Havilland Canada DHC-2 Beaver

The de Havilland Canada DHC-2 Beaver is a single-engined, high-wing, propeller-driven, STOL aircraft developed by de Havilland Canada, primarily known as a bush plane. It is used for cargo and passenger hauling, aerial application , and has been widely adopted by armed forces as a utility aircraft...

aircraft which were then redesignated L-20 before the aircraft entered service.