Grumman E-1 Tracer
carrier-capable airborne early warning aircraft family by the Grumman Corporation
The Grumman E-1 Tracer (WF prior to 1962) was the first purpose-built airborne early warning aircraft used by the United States Navy. It was a derivative of the Grumman C-1 Trader and entered service in 1960. It was replaced by the more modern Grumman E-2 Hawkeye by the mid-1960s-1970s.
Design and development
Following World War II, modified attack aircraft, including the AD-3W Skyraider and TBM-3W Avengers, filled the airborne early warning role. In 1951, the US Navy, seeking a replacement for the TBM-3W, asked Grumman and Vought for new AEW aircraft based on their competing designs for a carrier-based anti-submarine aircraft, the Grumman XS2F Tracker and the Vought XS2U. Grumman's design, Design 95, which was designated XWF-1 under the 1922 United States Navy aircraft designation system, used the same fuselage and wings as the XS2F, with an AN/APS-20 radar mounted on a pylon over the forward fuselage. The arrangement was chosen to not require changes to the Tracker's wing folding design. Two prototypes were ordered, but the project was cancelled late in 1952.
In 1955, engineers at Grumman Aircraft Engineering Corporation began studies on how to accommodate a new radar being developed by Hazeltine (which became the AN/APS-82) aboard a carried-based aircraft, and concluded that a design based on the Tracker would be the best option. When, later that year, the US Navy's Bureau of Aeronautics (BuAer) developed requirements for a new AEW aircraft, Grumman proposed a development of the Tracker, and began detailed work on the project.
The E-1 was designated WF under the 1922 United States Navy aircraft designation system; the designation earned it the nickname "Willy Fudd".
The public source identifies “Grumman E-1 Tracer” as carrier-capable airborne early warning aircraft family by the Grumman Corporation. This brief keeps that definition visible, then builds a research path around Grumman, Tracer and carrier-capable.
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Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Apr 6, 2026. The linked authority identifier is Q431918. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1962, 1960, 1951 and 1922.
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This entry incorporates text from “Grumman E-1 Tracer” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.