Lt. Philip Dalton (April 1, 1903 – July 25, 1941[1]) was a United States military scientist, pilot and engineer.
[3] He continued his studies at Princeton University, where he received a master's degree in physics, and Harvard, after which he resigned his Army commission and joined the United States Naval Reserve.
His first models were designed in the early 1930s, but in 1932 his first version of the E-6B, originally known as the "Dalton Dead Reckoning Computer", came into existence.
On July 24, 1941, Dalton and Harry Lee Rogers, Jr., a student pilot, were killed when their aircraft crashed near Hybla Valley, Virginia.
[citation needed] By this time, Dalton's devices were in widespread use by all aviation branches of the US and British military services.