| 词条 | Curtiss CR | |||||||||||||||
| 释义 |
The Curtiss CR was a racing aircraft designed for the United States Navy in 1921 by Curtiss. It was a conventional single-seater biplane with a monocoque fuselage and staggered single-bay wings of equal span braced with N-struts. Two essentially similar landplane versions were built as the CR-1 and CR-2, which were both eventually converted to seaplanes as the CR-3 in 1923 and CR-4 in 1924. A refined version was developed for the US Army Air Service under the designation R-6. These latter two aircraft featured refined aerodynamics included surface-mounted radiators. Operational historyThe Curtiss CRs enjoyed successful racing careers. Their first major win was at the 1921 Pulitzer Trophy race, where piloted by Bert Acosta the CR-1 took first place with an average speed of 176.75 mph (283.49 km/h), nearly two minutes ahead of its closest rival. The following year, this aircraft was modified and redesignated CR-2 and joined in the Pulitzer race by a second aircraft built to the same new standard, plus two R-6s flown by Army pilots. These Curtiss aircraft took first through fourth place, the two R-6s followed by the two CR-2s. The race was won by Lt. Russell Maughan with an average speed of 205.856 mph (330,172 km/h) with Lt. Lester Maitland in second place (198.850 mph/318.936 km/h). Maughan's effort incidentally broke every closed-circuit airspeed record up to 124 mi (200 km). The CR-2s took third and fourth places piloted by Lt Harold Brow (average speed 193.695 mph/310.667 km/h) and Lt Jg Al Williams (average speed 187.996 mph/301.527 km/h). The Army built upon this success with the R-6s by using the aircraft to break the world airspeed record before 1922 was over, Gen Billy Mitchell flying one to 224.28 mph (359.72 km/h) on 18 October. In March the following year, an R-6 flown by Lt. Maughan lifted the record to 236.587 mph (380.74 km/h). The R-6 design was developed in 1923 into the longer-winged XPW-8, the prototype of the PW-8 fighter. In 1923, the CR-2s were fitted with floats for the Schneider Trophy race and redesignated CR-3. The aircraft took first and second place, piloted by David Rittenhouse (average speed 177.977 mph, 285.457 km/h) and Rutledge Irvine (173.932 mph, 278.970 km/h). Following this victory, one of the aircraft was further modified as the CR-4 for an attempt on the world airspeed record for seaplanes. It achieved this in 1924 with a speed of 188 mph.{{Citation needed|date=February 2011}} Operators
Specifications (CR.3 Seaplane){{aerospecs|ref=Curtiss Aircraft, 1907-1947[1] |met or eng?=eng |crew= one (pilot) |capacity= |length m= 7.52 |length ft= 24 |length in= 8 |span m= 6.90 |span ft= 22 |span in= 8 |swept m= |swept ft= |swept in= |rot number= |rot dia m= |rot dia ft= |rot dia in= |dia m= |dia ft= |dia in= |width m= |width ft= |width in= |height m= 3.27 |height ft= 10 |height in= 9 |wing area sqm= 15.6 |wing area sqft= 168 |swept area sqm= |swept area sqft= |rot area sqm= |rot area sqft= |volume m3= |volume ft3= |aspect ratio= |empty weight kg= 961 |empty weight lb= 2,119 |gross weight kg= 1,178 |gross weight lb= 2,597 |lift kg= |lift lb= |eng1 number= 1 |eng1 type= Curtiss D-12 5PL |eng1 kw= 336 |eng1 hp= 450 |eng1 kn= |eng1 lbf= |eng1 kn-ab= |eng1 lbf-ab= |eng2 number= |eng2 type= |eng2 kw= |eng2 hp= |eng2 kn= |eng2 lbf= |eng2 kn-ab= |eng2 lbf-ab= |max speed kmh= 312 |max speed mph= 194 |max speed mach= |cruise speed kmh= |cruise speed mph= |range km= 452 |range miles= 281 |endurance h= |endurance min= |ceiling m= 6,706 |ceiling ft= 22,000 |glide ratio= |climb rate ms= |climb rate ftmin= |sink rate ms= |sink rate ftmin= |armament1= |armament2= |armament3= |armament4= |armament5= |armament6= }} See also{{aircontent|related=
|similar aircraft=
|lists= |see also= }} References
1. ^Bowers 1979, p. 230.
External links{{commons category|Curtiss CR}}
6 : Schneider Trophy|United States sport aircraft 1920–1929|Curtiss aircraft|Single-engined tractor aircraft|Biplanes|Aircraft first flown in 1921 |
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