12 June, 1959.Album with 5 original mounted photographs of the first Hovercraft. each measuring ca. 18 x 13 cm. nr. 1. 12 Juin 1959 Présentation en public. Le décollage. nr. 2. 12 juin 1959. Le vol. à 40 cm. au-dessus de la mer non loin du Queen Mary. nr. 3. 23 juin 1959. A portsmouth simulance de débarquement. nr. 4. 27 Juillet 1959. La traverséee de la Manche. Sortie de Calais. nr. 5. 27 juillet 1959. La traversée de la Manche. Calais-Douvres en 2 heures 3 minutes. oblong 8v0. orig. cloth with printed Hovercraft 1959.
Original photographs of the first Hovercraft the SR-N1. A really desirable album each photograph with typed text on verso in French. Of course of utmost rarity and in good condition. With the famous photograph of the Hovercraft in front of the Queen Mary. SR.N1
SR.N1 General Arrangement
This lack of military interest meant that there was no reason to keep the concept secret, and it was declassified. Cockerell was finally able to convince the National Research Development Corporation to fund development of a full-scale model. In 1958 the NRDC placed a contract with Saunders-Roe for the development of what would become the SR.N1, short for "Saunders-Roe, Nautical 1".
The SR.N1 was powered by a 450 hp Alvis Leonides engine powering a vertical fan in the middle of the craft. In addition to providing the lift air, a portion of the airflow was bled off into two channels on either side of the craft, which could be directed to provide thrust. In normal operation this extra airflow was directed rearward for forward thrust, and blew over two large vertical rudders that provided directional control. For low-speed manoeuvrability, the extra thrust could be directed fore or aft, differentially for rotation. Wikipedia:" SR.N1 made its first hover on 11 June 1959, and made its famed successful crossing of the English Channel on 25 July 1959. In December 1959, the Duke of Edinburgh visited Saunders-Roe at East Cowes and persuaded the chief test-pilot, Commander Peter Lamb, to allow him to take over the SR.N1's controls. He flew SR.N1 so fast that he was asked to slow down a little. On examination of the craft afterwards, it was found that she had been dished in the bow due to excessive speed, damage which was never allowed to be repaired, and was from then on affectionately referred to as the 'Royal Dent'."
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