Hamilton Standard

[1] In the early 1930s, Frank W. Caldwell of Hamilton Standard led a team that developed a variable-pitch propeller, using hydraulic pressure and centrifugal force to change the angle of attack of the blades.In 1968, Hamilton began delivering automatic, electronic systems for control of cabin pressure in aircraft.General Motors' propeller business, which originated with its purchase of Aeroproducts in 1940, was acquired by Hamilton Standard in 1990.Sundstrand brought a long history and portfolio of aerospace products to the newly named company.Hamilton Sundstrand continues to provide aerospace components and systems to most of the world's aircraft manufacturers, including Boeing, Airbus, Bombardier, and Embraer.
The 1,000th controllable pitch propeller produced by Hamilton Standard with the 1933 Collier Trophy-winning team that designed it
Hamilton Standard propeller on Douglas DC-3 of American Airlines
Hamilton Standard four-bladed propeller used on a Douglas DC-6
SubsidiaryAerospaceHamilton SundstrandWindsor Locks, ConnecticutUnited StatesFrank W. CaldwellaircraftpropellerUnited Aircraft and Transport CorporationBoeingUnited AirlinesSikorskyPratt & WhitneyDouglas DC-3American AirlinesDouglas DC-6PittsburghMilwaukeeThomas F. HamiltonCharles LindberghSpirit of St. Louisangle of attackCollier TrophyUnited Aircraft CorporationBoeing 707sDouglas DC-8sConvair 880Apollo 11fuel cellGeneral MotorsUnited Technologies CorporationSundstrand CorporationAirbusBombardierEmbraerGoodrich CorporationUTC Aerospace SystemsRockwell CollinsCollins AerospaceList of aircraft propeller manufacturersAtlantic Southeast Airlines Flight 529Atlantic Southeast Airlines Flight 2311Arthur A. CollinsBenjamin GoodrichDavid SundstrandUnited Technologies