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The Army rejected it, but Marines in Vietnam relied on the M19 60mm mortar
The M19 was favored by the Marines — even though 10 pounds heavier and less accurate than the M2.
-

Lawrence Sperry: Genius on autopilot
Lawrence Sperry never rested on his laurels. Between 1915 and 1923, he had 23 patents either pending or granted. Among his inventions was instrumentation that permitted aircraft to be piloted when visibility was zero.
-
The Army rejected it, but Marines in Vietnam relied on the M19 60mm mortar
The M19 was favored by the Marines — even though 10 pounds heavier and less accurate than the M2.
-
Lawrence Sperry: Genius on autopilot
Lawrence Sperry never rested on his laurels. Between 1915 and 1923, he had 23 patents either pending or granted. Among his inventions was instrumentation that permitted aircraft to be piloted when visibility was zero.
-
The Army rejected it, but Marines in Vietnam relied on the M19 60mm mortar
The M19 was favored by the Marines — even though 10 pounds heavier and less accurate than the M2.
-
Lawrence Sperry: Genius on autopilot
Lawrence Sperry never rested on his laurels. Between 1915 and 1923, he had 23 patents either pending or granted. Among his inventions was instrumentation that permitted aircraft to be piloted when visibility was zero.











