| 词条 | Chyetverikov MDR-3 | |||||||||||||||
| 释义 |
The MDR-3 (a.k.a.11) was a long-range flying boat designed and built in the USSR from {{avyear|1931}}. DevelopmentIn 1931, Chyetverikov was commissioned to design a new long-range flying boat for MA (Morskaya Aviatsiya – naval aviation), for which Chyetverikov used few new parts, borrowing wings, tailplane and engine nacelles (mounted above the wing) from the Grigorovich TB-5 and a scaled-up Grigorovich ROM-2 fuselage. The use of ready designed or built components led to quick construction of the prototype which was ready for flight tests in Dec 1931, which commenced in January {{avyear|1932}} after the aircraft was transported to Sevastapol in the Crimea. Despite fast construction and excellent structural qualities, results of the flight tests were disappointing, with a takeoff time of 36 seconds, a climb rate of less than a metre per second and a ceiling of only 2,200m, resulting in the whole project being transferred to KOSOS (Konstrooktorskiy Otdel Sektora Opytnovo Stroitel'stva – section of experimental aeroplane construction), due to lack of faith in Chyetverikov's abilities to rectify the poor performance. The MDR-3 became the basis of the ANT-27, MDR-4 and MTB-1. Specifications (MDR-3){{aerospecs|ref= Gunston, Bill. “The Osprey Encyclopaedia of Russian Aircraft 1875–1995”. London, Osprey. 1995. {{ISBN|1-85532-405-9}} |met or eng?=met |crew= six |capacity= |length m= 21.9 |length ft= 71 |length in= 10½ |span m= 32.2 |span ft= 105 |span in= 7¾ |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= |height ft= |height in= |wing area sqm= 153 |wing area sqft= 1,649 |swept area sqm= |swept area sqft= |rot area sqm= |rot area sqft= |volume m3= |volume ft3= |aspect ratio= |wing profile= |empty weight kg= 8,928 |empty weight lb= 19,683 |gross weight kg= 13,973 |gross weight lb= 30,805 |lift kg= |lift lb= |eng1 number= 4 |eng1 type= BMW VI |eng1 kw= 507 |eng1 hp= 680 |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= 210 |max speed mph= 130.5 |max speed mach= |cruise speed kmh= |cruise speed mph= |stall speed kmh= |stall speed mph= |range km= 1,600 |range miles= 1,000 |endurance h= |endurance min= |ceiling m= 2,200 |ceiling ft= 7,218 |g limits= |roll rate= |glide ratio= |climb rate ms= 4.76 |climb rate ftmin= 937.4 |sink rate ms= |sink rate ftmin= |armament1= 1 × machine gun in a nose mounting. |armament2= 1 × machine-gun in a dorsal mounting. |armament3= |armament4= |armament5= |armament6= }} See also
References{{commons category|Chyetverikov}}{{refbegin}}
6 : Soviet patrol aircraft 1930–1939|Flying boats|Chyetverikov aircraft|High-wing aircraft|Four-engined push-pull aircraft|Aircraft first flown in 1936 |
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