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Spruce Goose Timeline

(1942 – Present)

The Spruce Goose, officially the H-4 Hercules, was an enormous wooden-hulled flying boat designed and built by Howard Hughes and the Hughes Aircraft Company during World War II. Intended as a military transport capable of carrying troops and equipment across the Atlantic while avoiding German U-boats, it was the largest aircraft ever built at the time. Though it flew only once, for about 26 seconds over Long Beach Harbor in November 1947, the aircraft remains an enduring symbol of ambitious engineering and aviation history. Less

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Development and Wartime Origins

HK-1 contract issued

1942

In 1942, the HK-1 aircraft contract was issued as a development contract during World War II. It called for three aircraft to be constructed in two years for the war effort, aiming to produce a massive flying boat capable of transporting troops and materiel across the Atlantic.

Image source: Hughes H-4 Hercules

HK-1 contract issued

Construction of the H-4 Hercules begins

1942 - 1947

Following the issuance of the HK-1 contract in 1942, work began on building the enormous flying boat under Howard Hughes' direction. Due to wartime restrictions on strategic materials such as aluminum, the aircraft was built largely of birch wood, earning it the nickname 'Spruce Goose.'

Development costs reach $23 million

1947

In all, development cost for the plane reached $23 million (equivalent to $253 million in 2024 dollars), funded largely through government contracts, which would later draw scrutiny from Congress.

Legacy

Largest seaplane ever built

1947

The Hercules became the largest seaplane ever built, a title it still holds. Its immense size and eight engines made it an unprecedented feat of aviation engineering.

Record wingspan unmatched until 2019

Apr 13, 2019

The H-4 Hercules had the largest wingspan of any aircraft ever flown until the twin-fuselaged Scaled Composites Stratolaunch first flew on April 13, 2019, ending the Spruce Goose's decades-long record.

Listed on the National Register of Historic Places

2024

The Hughes H-4 Hercules was listed on the National Register of Historic Places in 2024, formally recognizing its significance in American aviation history nearly eight decades after its lone flight.

The 1947 Flight and Controversy

Senate War Investigating Committee testimony

1947

Howard Hughes was called to testify before the Senate War Investigating Committee in 1947 over the use of government funds for the aircraft. Facing accusations of waste and mismanagement, Hughes vowed before the committee that he would prove the plane could fly.

Project never advances beyond the prototype

1947

After its single brief flight on November 2, 1947, the project never advanced beyond the prototype. The single H-4 Hercules remained the sole example ever completed of the three originally planned.

Taxi tests begin with Hughes at the controls

Nov 2, 1947

On November 2, 1947, the taxi tests began with Howard Hughes personally at the controls, as he sought to demonstrate the airworthiness of the giant flying boat in response to congressional criticism.

First and only flight of the Spruce Goose

Nov 2, 1947

During the taxi tests on November 2, 1947, with Hughes at the controls, the H-4 Hercules lifted briefly off the water near Long Beach, making only one brief flight. Thousands of spectators watched the short hop, proving the aircraft was airworthy.

Preservation and Display

Crew reduced to 50 workers

1962

Howard Hughes maintained the aircraft in flight-ready condition for years after its sole flight. In 1962, the company reduced the crew maintaining the H-4 to just 50 workers as interest and resources dwindled.

Crew disbanded after Hughes' death

1976

Following Howard Hughes' death in 1976, the small crew that had maintained the H-4 Hercules was disbanded, leaving the famous aircraft without caretakers and prompting questions about its future.

Aero Club of Southern California acquires the H-4

1980

In 1980, the H-4 was acquired by the Aero Club of Southern California, sparing it from dismantlement and setting the stage for public display.

Public display begins in Long Beach

1980 - 1992

The Aero Club of Southern California put the aircraft on display to the public in Long Beach, California, from 1980 to 1992, allowing millions of visitors to see the legendary flying boat up close.

Display opens in dome next to Queen Mary

1980

The Aero Club placed the aircraft on display in a very large geodesic dome next to the Queen Mary ship exhibit in Long Beach, California, creating a popular tourist attraction pairing the ship and the seaplane.

Plan to dismantle the aircraft proposed

May 1980

In May 1980, a plan to dismantle the aircraft and offer portions of it to various museums was put forward, threatening to break up the world's largest seaplane.

Time Voyager attraction constructed

1986

In 1986, a secondary simulator-style attraction named Time Voyager was constructed next to the H-4, at a cost of $2.5 million (~$6.05 million in 2024), enhancing the visitor experience at the Long Beach site.

Disney acquires Long Beach attractions

1988

In 1988, The Walt Disney Company acquired both Long Beach attractions — the Queen Mary and the H-4 Hercules exhibit — along with the associated Long Beach real estate by Pier J.

Disney ends display of the Hercules

1991

In 1991, Disney informed the Aero Club of Southern California that it no longer wished to display the Hercules aircraft after its highly ambitious Port Disney plan was scrapped, leaving the aircraft's future uncertain once again.

Epic journey to McMinnville

1993 - Feb 27, 1993

The aircraft was transported on a remarkable 138-day, 1,055-mile (1,698 km) trip from Long Beach to McMinnville, Oregon, arriving on February 27, 1993, to begin a new chapter in preservation.

Image source: North American Aerospace Museum

Epic journey to McMinnville

Displayed at Evergreen Aviation & Space Museum

1993

After arriving in McMinnville in February 1993, the H-4 Hercules was moved to display at the Evergreen Aviation & Space Museum in McMinnville, Oregon, United States, where it remains the centerpiece of the collection today.

Key Facts

  1. The Spruce Goose (H-4 Hercules) was commissioned in 1942 by the U.S. government to transport troops and cargo across the Atlantic without risking attacks by German U-boats.
  2. Despite its nickname, the aircraft was built primarily of birch wood laminated with fabric, since wartime restrictions limited the use of aluminum; 'Spruce Goose' was actually a press nickname.
  3. With a wingspan of 320 feet (97.5 meters), it remained the largest wingspan of any aircraft ever built until the Stratolaunch Roc first flew in 2019.
  4. Howard Hughes personally piloted the aircraft on its one and only flight on November 2, 1947, when it traveled about one mile at approximately 70 feet above Long Beach Harbor, lasting roughly 26 seconds.
  5. After Hughes' death, the aircraft was preserved and displayed at the Evergreen Aviation Museum in McMinnville, Oregon, where it remains today.

Source

This Spruce Goose timeline was generated with the help of AI, using information found on the internet.

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