| 词条 | Ambrosini S.7 | ||||||||||||||||
| 释义 |
The Ambrosini SAI.7 was an Italian racing aircraft flown before World War II that entered production as a military trainer (designated simply S.7) after the war. It was of conventional configuration, constructed of wood, with a tail wheel undercarriage. Power was provided by an air-cooled inverted inline engine, the Alfa-Romeo model 115 with 225 horsepower. DevelopmentThe SAI.7 was built to compete in the IV Avioraduno del Littorio rally, which departed Rimini on 15 July 1939. As equipped for the race, the two SAI.7s were fitted with special glazed fairings extending from the canopy to the nose of the aircraft, to provide extra streamlining. The aircraft began their proving flights too late, and were disqualified from the competition, but on August 27, one of them set a new world airspeed record for a 100 km closed loop, which it completed at 403.9 km/h (252 mph) powered by a Hirth HM 508D. During the war, the Regia Aeronautica expressed interest in the aircraft as a trainer for fighter pilots, and a slightly revised version entered limited production in 1943 as the SAI.7T. Only 10 were built, but in 1949 a modernised version powered by an Alfa Romeo engine was produced, 145 of them for the re-formed Italian Air Force, including some single-seaters. On 21 December 1951 Leonardo Bonzi set new airspeed records in one over 100 km and 1000 km, at 367.36 km/h and 358.63 km/h respectively. The final stage in the S.7's development was the Supersette (Super 7), two standard S.7s, one re-engined with a 380 hp de Havilland Gipsy Queen with a unique four-piece cowling that opened like a "flower petal",[3] the other with an Alfa Romeo 121. Both were modified and refined several times, and in the latter aircraft, Guidantonio Ferrari increased the international airspeed record for this category of aircraft to 419.482 km/h at Rome on December 3, 1952. Despite this, the air force was no longer interested in buying piston-engined trainers, and no further Supersettes were built. Both are preserved in museums. An S.7 fuselage was also used as the basis for the Ambrosini Sagittario, which tested swept wing configurations. Variants
original racing aircraft
World War II trainer.
Post-war trainer, touring aircraft.
Two prototypes of an improved, armed trainer. Operators
Regia Aeronautica - (Wartime) operated 10 SAI Ambrosini 7 delivered from August 1942 until August 1943[4]
Aeronautica Militare Italiana - (Postwar) operated 145 Ambrosini S.7 until 1960s[2] Specifications (S.7){{aircraft specifications|plane or copter?= plane |jet or prop?= prop |ref=The Encyclopedia of World Aircraft[5] |crew= two, pilot and instructor |capacity= |length main= 8.17 m |length alt= 26 ft 9{{frac|3|4}} in |span main= 8.79 m |span alt= 28 ft 10 in |height main= 2.80 m |height alt= 9 ft 2{{frac|1|4}} in |area main= 12.80 m2 |area alt= 137.8 sq ft |airfoil= |empty weight main= 1,105 kg |empty weight alt= 2,436 lb |loaded weight main= |loaded weight alt= |useful load main= |useful load alt= |max takeoff weight main= 1,317 kg |max takeoff weight alt= 2,903 lb |more general= |engine (prop)=Alfa Romeo 115-ter |type of prop= six-cylinder air-cooled inline engine |number of props=1 |power main= 168 kW |power alt= 225 hp |power original= |max speed main= 358 km/h |max speed alt= 193 knots, 223 mph |cruise speed main= 264 km/h |cruise speed alt= 143 knots, 164 mph |cruise speed more=(econ cruise) |never exceed speed main= 596 km/h |never exceed speed alt= 322 knots, 370 mph[6] |stall speed main= 115 km/h |stall speed alt= 62 knots, 71.5 mph[6] |range main= 1,000 km |range alt= 540 nm, 620 miles |ceiling main= 5,250 m |ceiling alt= 17,225 ft |climb rate main= 5.6 m/s |climb rate alt= 1,100 ft/min |loading main= |loading alt= |power/mass main= |power/mass alt= |more performance= |armament= |avionics= }} See also{{aircontent|related=
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|see also= }} References1. ^{{cite web|url=http://www.alieuomini.it/catalogo/dettaglio_catalogo/sai_ambrosini,101.html|title=SAI Ambrosini 7, Aerei militari, Schede tecniche aerei militari italiani e storia degli aviatori|first=R.|last=Stocchetti|publisher=|accessdate=19 September 2016}} 2. ^1 {{cite web|url=http://www.aerei-italiani.net/Militari_Dal_Secondo_Dopoguerra_Ambrosini_S.7_Aerei_Italiani.html|title=Aerei-Italiani.net Schede Tecniche Aeromobili Militari Dal Secondo Dopoguerra Aerei Italiani|publisher=|accessdate=19 September 2016}} 3. ^{{cite journal|title=none|magazine=Flying Magazine|date=August 1954|page=39}} 4. ^{{cite web|url=http://www.alieuomini.it/catalogo/dettaglio_catalogo/sai_ambrosini,101.html|title=SAI Ambrosini 7, Aerei militari, Schede tecniche aerei militari italiani e storia degli aviatori|first=R.|last=Stocchetti|publisher=|accessdate=19 September 2016}} 5. ^Donald 1997, p. 47. 6. ^1 Smith 1951, p.227. Further reading{{commons category|Ambrosini S.7}}
7 : SAI Ambrosini aircraft|Italian sport aircraft 1930–1939|Italian military trainer aircraft 1940–1949|Racing aircraft|Low-wing aircraft|Single-engined tractor aircraft|Aircraft first flown in 1939 |
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