Blue Bird K3
Encyclopedia
Blue Bird K3 was a hydroplane powerboat
Powerboat
A powerboat is another name for a motorboat. Powerboat may also refer to:* Powerboating* F1 Powerboat World Championship* Offshore powerboat racing...

 commissioned in 1937 by Sir Malcolm Campbell
Malcolm Campbell
Sir Malcolm Campbell was an English racing motorist and motoring journalist. He gained the world speed record on land and on water at various times during the 1920s and 1930s using vehicles called Blue Bird...

, to rival the Americans' efforts in the fight for the world water speed record
Water speed record
The World Unlimited water speed record is the officially recognised fastest speed achieved by a water-borne vehicle. The current record of 511 km/h was achieved in 1978....

. She set three world water speed record
Water speed record
The World Unlimited water speed record is the officially recognised fastest speed achieved by a water-borne vehicle. The current record of 511 km/h was achieved in 1978....

s, first on Lake Maggiore
Lake Maggiore
Lake Maggiore is a large lake located on the south side of the Alps. It is the second largest of Italy and largest of southern Switzerland. Lake Maggiore is the most westerly of the three great prealpine lakes of Italy, it extends for about 70 km between Locarno and Arona.The climate is mild...

 in September 1937, then later twice raising her own record.

The name "K3" was derived from its Lloyd's unlimited rating, and was carried in a prominent circular badge on the forward hull.

Construction

After Campbell's achievement of the 300 mph land speed record
Land speed record
The land speed record is the highest speed achieved by a wheeled vehicle on land. There is no single body for validation and regulation; in practice the Category C flying start regulations are used, officiated by regional or national organizations under the auspices of the Fédération...

 with Blue Bird in 1935 he retired from the land speed record. Shortly afterwards he switched his attentions to the water speed record
Water speed record
The World Unlimited water speed record is the officially recognised fastest speed achieved by a water-borne vehicle. The current record of 511 km/h was achieved in 1978....

, at that time dominated by the American Gar Wood.

Fred Cooper of Saunders Roe was commissioned to design a small hydroplane powered by the same Rolls Royce R engine used in Blue Bird, and also in pairs in Segrave
Henry Segrave
-External links:* * * * *...

 and Kaye Don
Kaye Don
Kaye Don was a world record breaking car and speedboat racer who became a motorcycle dealer on his retirement from road racing and set up Ambassador Motorcycles.-Biography:...

's Miss England
Miss England
The Miss England competition is an annual beauty pageant targeted at young females aged 17–24 years living in England. Entrants must hold a British passport to enter....

 boats. Of the three individual R engines used by K3, one had previously run in Blue Bird and one in Miss England
Miss England
The Miss England competition is an annual beauty pageant targeted at young females aged 17–24 years living in England. Entrants must hold a British passport to enter....

.

Unlike Gar Wood's multi-engined monsters, Blue Bird was designed for a single engine, and the smallest possible craft to carry it. She was 23 feet long, compared to 38 feet for Miss America X. Her estimated top speed on paper was to be 130 mph. It was usual at this time for English hydroplanes to have their engines mounted as far astern as possible (Gar Wood disagreed, and had pointed this out to Segrave). K3 took this a step further and had a narrow central nacelle that overhung the transom of the stern. This rearward weight distribution encouraged planing, but could lead to some peculiar attitudes when setting off at slow speeds, as the whole boat appeared to be sinking by the stern.

Records

On 1 September 1937, at Lake Maggiore
Lake Maggiore
Lake Maggiore is a large lake located on the south side of the Alps. It is the second largest of Italy and largest of southern Switzerland. Lake Maggiore is the most westerly of the three great prealpine lakes of Italy, it extends for about 70 km between Locarno and Arona.The climate is mild...

 on the border between Switzerland and Italy, K3 set a record of 126.32 mph, breaking Gar Wood's previous 5-year-old record. The next day she improved this to 129.5 mph.

Breaking the design speed of 130 would require another year, when on 17 August 1938 at Lake Hallwyl in Switzerland at 130.91 mph(210.63 km/h).

Ventnor "three pointer"

Despite these records, Campbell was dissatisfied with their small margin over the previous record (6 mph). K3's hull was a single-step hydroplane, as already used for Miss England. This lifted half of the hull clear of the water, reducing drag upon it. A new idea from America was the "three point" hydroplane, where the forward hull is divided into two sponsons and the boat rides at speed on just these and the propellor. This reduces the wetted area (and drag) still further. It was not possible to convert K3 to this hull form, so Campbell began work on a whole new boat, K4, re-using the same engine.

Restoration

The original boat is currently being restored at Filching Manor in East Sussex with the view to relaunch the boat when completed. The boat has been stripped down and fully rebuilt using parts to the original standard. (http://www.k3bluebird.com)
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