Kollsman

Kollsman
Name	Kollsman
Type	Private
Industry	Avionics
Founded	1921
Headquarters	Garden City, New York
Products	Altimeters, Window Adjusters, Aircraft Instruments
Key people	Paul Kollsman, Franklin D. Roosevelt, Charles Lindbergh, William Boeing

Kollsman is an American firm historically known for precision altimeters, aircraft instruments, and the invention of the adjustable altimeter window and pressure adjuster widely used in aviation. Founded in the early 20th century, the company became integral to developments in civil aviation, military aviation, and aerospace instrument standardization across organizations such as the United States Army Air Corps, the United States Navy, and later NATO-aligned air forces. Kollsman instruments accompanied milestones in aviation involving figures like Charles Lindbergh, Howard Hughes, Amelia Earhart, and manufacturers such as Boeing and Douglas Aircraft Company.

History

Paul Kollsman established his enterprise in New York during an era marked by rapid innovation in flight, contemporaneous with pioneers like Wright brothers and institutions such as Smithsonian Institution that documented aeronautical progress. Early contracts with entities including the United States Army Air Service, the Curtiss-Wright Corporation, and commercial carriers like Pan American World Airways expanded Kollsman’s reputation. During the interwar period, regulatory activities by bodies like the Civil Aeronautics Authority and later the Federal Aviation Administration shaped instrument standards that favored precision manufacturers. World War II drove large-scale procurement from firms linked to War Department procurement networks, and postwar growth tied Kollsman to projects with Grumman and Lockheed Corporation as jet aviation matured.

Products and Innovations

Kollsman produced altimeters, barometers, pressure gauges, cockpit instruments, and accessories adopted by producers including Boeing, Douglas Aircraft Company, Lockheed Corporation, and Northrop Corporation. The company introduced precision vacuum gauges used on platforms from Cessna trainers to Convair transports, and developed components for navigation suites alongside technologies from Honeywell, Collins Radio Company, Garmin, and Rockwell Collins. Kollsman’s innovations influenced avionics systems used in landmark programs such as the B-17 Flying Fortress, the B-52 Stratofortress, and civilian airliners like the Douglas DC-3. Collaboration and competition occurred with instrument makers including Sperry Corporation, Bendix Corporation, RCA, General Electric, and Thales Group as aerospace instrumentation evolved toward electronic flight displays used by Airbus and Boeing modern airframes.

Kollsman Window and Kollsman Adjuster

The adjustable altimeter window, commonly referred to in industry parlance as the Kollsman window or adjuster, standardized the practice of setting local pressure references for altimetry across airfields and carriers such as Heathrow Airport, LaGuardia Airport, and JFK International Airport. Aviation meteorological services like National Weather Service and aeronautical information publications from ICAO and FAA incorporated barometric setting procedures that referenced the adjuster’s concept. Pilots from airlines such as British Airways, Lufthansa, Air France, Japan Airlines, and military aviators in units like the Royal Air Force and United States Air Force routinely used the device as part of preflight checks. The adjuster’s role features in flight operations documentation maintained by organizations like IATA and ICAO and informs procedures during approaches to airports such as Heathrow and Charles de Gaulle Airport.

Role in Aviation Instruments

Kollsman instruments were integral to cockpit instrument panels alongside attitude indicators, heading indicators, and airspeed indicators produced by suppliers including Sperry Corporation, Bendix, Honeywell, and Garmin. Their altimeters provided critical input for flight crews during operations involving IFR approaches under rules promulgated by ICAO, FAA, and the National Transportation Safety Board investigations. Military applications saw Kollsman gear installed on platforms operated by United States Navy, United States Marine Corps, and NATO partners, supporting missions in theaters referenced by events such as the Korean War and the Vietnam War. In rotary-wing aviation, Kollsman devices found use in helicopters manufactured by Bell Helicopter, Sikorsky Aircraft, and Eurocopter, contributing to instrument flight capability in both civil and combat search-and-rescue operations.

Corporate Development and Ownership

Throughout the 20th century, Kollsman engaged in mergers, acquisitions, and supply agreements within a defense-industrial ecosystem that included conglomerates like United Technologies Corporation, Raytheon Technologies, General Dynamics, Northrop Grumman, and Lockheed Martin. Corporate relationships with avionics suppliers such as Honeywell Aerospace and Rockwell Collins influenced product lines and manufacturing footprints in regions near aerospace hubs like Long Island, Seattle, and Southern California. Government contracting procedures under agencies such as the Department of Defense and procurement frameworks exemplified by GSA schedules affected Kollsman’s business, while industry standards from bodies including RTCA, Inc., SAE International, and ISO guided product certification and export.

Legacy and Impact on Avionics

Kollsman’s legacy endures in the ubiquitous presence of the altimeter window concept and in historical collections housed by institutions like the Smithsonian National Air and Space Museum and archives maintained by universities such as Massachusetts Institute of Technology and Princeton University. The company’s instruments appear in restoration projects involving the Spirit of St. Louis and other heritage aircraft preserved by organizations such as the Commemorative Air Force and National Museum of the United States Air Force. Kollsman’s technical contributions influenced later developments by Garmin, Honeywell, Collins Aerospace, and modern integrated avionics suites certified under regulations from EASA and FAA. Its impact is recognized in professional communities including AIAA, IEEE Aerospace and Electronic Systems Society, and Royal Aeronautical Society.

Category:Avionics manufacturers