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Home / Kollsman Model 21 Sensitive Altimeter

Kollsman Model 21 Sensitive Altimeter

Jimmy Doolittle used a sensitive altimeter during his 1929 blind flight.

Kollsman Model 21 Sensitive Altimeter

A sensitive altimeter measured the altitude of an airplane above sea level and allowed that reference to be set by a knob. This is the first model produced by Kollsman. Jimmy Doolittle used the same type of altimeter in his historic 1929 “blind flying” test flight.

Credit: Photo by Eric Long, Smithsonian National Air and Space Museum (NASM 2014-04797).

Date: 2014

Photo Number: NASM 2014-04797

Find out more about Kollsman Model 21 Sensitive Altimeter.