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Aviation History
1933
1933 - 1274.PDF
FLIGHT, DECEMBER 21, 1933 A NEW ITALIAN LIGHT AMPHIBIAN LTHOUGH specialising in the construction of large machines, chiefly flying-boats, the Savoia Mar- chetti Company has had considerable success, both in Italy and America, with the small S.56 biplane amphibian. The company has now designed and built a small monoplane amphibian which incorporates several interesting features, especially in the undercarriage. The S.80, as the new machine is called, is a 2-3-seater monoplane with a cantilever wing of " semi-thick " sec tion. The wing is of wooden construction, covered with fabric, and is divided into a number of watertight com partments in order that it may keep the aircraft afloat in an emergency when the hull has been damaged. The differential ailerons are of welded-steel tubes. Wood con struction is used for the adjustable tailplane and fin, but the elevator and rudder are made of welded-steel tubes. The hull has a double-planked wooden bottom, using copper riveting. The main cockpit, which extends a small distance into the leading edge, is fitted with dual controls and sliding and adjustable seats. A third cockpit and luggage compartment is located in the trailing edge of the wing. The engine mounting is made from chrome molybdenum steel tubes covered with fairings of " duranalio " sheet protected against corrosion. An undercarriage with retractable wheels is fitted. This is of patented Savoia Marchetti design, and when the wheels are " up," offers very little resistance indeed. Each half consists essentially of a pivoted shock absorber leg which carries the wheel. The pivoting movement carries the wheel into a housing under the wing which is covered by a fairing above the wheel. A single " Colombo " S.63 six-cylinder in-line air-cooled engine giving a maximum of 150 h.p. is fitted. Perform ance figures of the S.80 with this power plant are given below. Wing span, 36 ft. (11 m.) ; length, 25 ft. 7 in. (7,80 m.) ; height, 8 ft. 6 in. (2,60 m.) ; wing area, 193.7 sq. ft. (18 m2.) ; weight empty, 1,543.5 lb. (700 kg.) ; useful load, normal, 661.5 lb. (300 kg.) ; useful load, maximum, 882 lb. (400 kg.) ; total weight, normal, 2,205 lb. (1,000 kg.) ; total weight, maximum, 2,425.5 lb. (1,100 kg.) ; wing loading, normal, 11.4 lb./sq. ft. (55.6 kg./m2.) ; wing loading, maximum, 12.5 lb./sq. ft. (61 kg./m2.) ; weight per h.p., normal, 17 lb. (7.7 kg.) ; weight per h.p., maximum, 18.6 lb. (8.46 kg.) ; maximum speed, 141 m.p.h. (227 km.p.h.) ; minimum speed, 64.7 m.p.h. (88 km.p.h.) ; climb to 3,281 ft. (1,000 m.), 4 min. 22 sec. ; to 6,562 ft. (2,000 m.), 11 min. 36 sec. ; to 9,843 ft. (3,000 m.), 20 min. 19 sec. ; to 16,405 ft. (5,000 m.), 56 min. 48 sec. ; service ceiling, 18,045.6 ft. (5,500 m.) ; take off from land, 16 sec. ; take off from water, 24 sec. ; range, with two people and 44 lb. (20 kg.) of luggage, at 124 m.p.h. (200 km.p.h.) ; with 661.5 lb. (300 kg.) useful load, 621.4 miles (1,000 km.) (5 hr.) ; with 882 lb. (400 kg.) useful load, 497 miles (800 km.) (4 hr.). C. DE R. THE SAVOIA-MARCHETTI S.80 : The upper illustration shows this amphibian with its wheels down for land work, while our sketches show how the undercarriage retracts. m M m s s Royal Air Force—Principal Air AJXC. to the King THE Air Ministry announces the appointment of Air Marshal Sir Robert Brooke-Popham, K.C.B., C.M.G., D.S.O., A.F.C., Air Officer Commanding-in-Chief, Air Defence of Great Britain, as Principal Air Aide-de-Camp to the King, in succession to Air Chief Marshal Sir Edward Leonard Ellington, K.C.B., C.M.G., C.B.E., Chief of the Air Staff. 1286
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