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1938

Massey-Harris #20 Combine
Society: ASABEMain Category: Agricultural & BiologicalSub Category: Equipment, Harvesting and BalingEra: 1930sDateCreated: 1938Ford MuseumDearbornState: MIZip: 48124Country: USAWebsite: https://www.asabe.org/awards-landmarks/asabe-historic-landmarks/massey-harris-20-combine-15.aspx, https://www.thehenryford.org/collections-and-research/digital-collections/artifact/18684/#slide=gs-274942Creator: Carroll, Thomas

Designated A Historic Landmark Of Agricultural Engineering The Massey-Harris No. 20 was the First Commercially- Successful Self-Propelled Combine Used to Harvest Small Grains Under a Wide Variety of Conditions, World-Wide. Engineered By Thomas Carroll, Chief Engineer, Aided by Robert Ashton and Albert Luke, Principal Assistants, it was First Marketed in 1938 by the Massey-Harris Company. This Combine Opened a New Era an Farm Mechanization and Revolutionized the Grain Harvesting Process. Forty-Four Years Later, This Same Harvesting Principle Continues to be Used Throughout the World.

YearAdded:
1982
Image Caption: Combine pictured at the Henry Ford Museum in Dearborn, MI
Hydromatic Propeller
Society: ASMEMain Category: Aerospace & AviationSub Category: AerospaceEra: 1930-1939DateCreated: 1938New England Air Museum
Bradley Intl. Airport
Windsor LocksState: CTZip: 06096Country: USAWebsite: http://www.asme.org/about-asme/history/landmarks/topics-a-l/air-and-space-transportation/-149-hydromatic-propeller-%28ca--1938%29, http://files.asme.org/ASMEORG/Communities/History/Landmarks/5572.pdfCreator: Hamilton Standard

Rapid development of aircraft design in the 1930s required many related innovations, including propeller design. The hydromatic propeller by Hamilton Standard marked a significant advance over the counterweight-type, controllable pitch propeller. The first test flight of the prototype took place in 1938: the public demonstration was made by a United Air Lines DC-3 over New York City on April 6, 1938. It played a distinguished role in allied combat aircraft in World War II.

YearAdded:
1990
Image Credit: Courtesy ASMEImage Caption: An early example of propeller innovations, including variable-pitch control and feathering capability.Era_date_from: 1938
Bonneville Dam, Columbia River System
Society: ASCEMain Category: Civil, ElectricalSub Category: Dams, Power Generation, Power, Energy & Industry ApplicationEra: 1930-1939DateCreated: 1938Colombia RiverPortlandState: ORZip: 97014Country: USAWebsite: http://www.asce.org/project/bonneville-dam,-columbia-river-power---nav-system/Creator: U.S. Army Corps of Engineers

The Bonneville Dam, Columbia River Power and Navigation System consists of 55 major projects on Oregon's Columbia River and is said to be the largest hydroelectric system in the world.

The Columbia River forms part of the border between Washington and Oregon and flows inland through the only waterway that crosses the Cascade Mountains. To harness the energy of the ninth longest river in North America, engineers developed unique design and construction approaches to overcome problems caused by depth of water, current velocity, and an irregularly-shaped river bottom.

YearAdded:
1987
Image Credit: Courtesy Flickr/Ann Larie Valentine (CC BY-SA 2.0)Image Caption: The impressive power of the Bonneville DamEra_date_from: 1938
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