Low-frequency radio range

Jimmy Doolittle demonstrated in 1929 that instrument flying is feasible.

The vibrating reed, developed in the 1920s, was a simple panel mounted instrument with

Early LFR station based on crossed loop antennas; later installations used Adcock antennas for improved performance.

The low-frequency radio range (LFR), also known as the four-course radio range, LF/MF four-course radio range, A-N radio range, Adcock radio range, or commonly "the range", was the main navigation system used by aircraft for instrument flying in the 1930s and 1940s, until the advent of the VHF omnidirectional range (VOR), beginning in the late 1940s. It was used for en route navigation as well as instrument approaches and holds.

单词	Low Frequency Radio Range
释义	Low Frequency Radio Range 英语百科 Low-frequency radio range The low-frequency radio range (LFR), also known as the four-course radio range, LF/MF four-course radio range, A-N radio range, Adcock radio range, or commonly "the range", was the main navigation system used by aircraft for instrument flying in the 1930s and 1940s, until the advent of the VHF omnidirectional range (VOR), beginning in the late 1940s. It was used for en route navigation as well as instrument approaches and holds.
随便看	arc resistance的意思 arc resistance furnace的意思 arc resistance heating的意思 arc resistance insulation的意思 arc resistance meter的意思 arc resistance test的意思 arc resistant的意思 arcresistant的意思 arc resistant material的意思 arc resistant plastics的意思 arc resisting的意思 arcresisting的意思 arc resisting property的意思 arc restrike的意思 arcrigenin的意思 arc ring的意思 arc root的意思 Arcru的意思 arc runner的意思 arc rust removal的意思 arc的意思 A.R.C.S的意思 arc sample的意思 arcs boutants的意思 arc scale的意思

Low Frequency Radio Range

Low-frequency radio range