Chyetverikov MDR-3
| {{Infobox Aircraft Begin
| name=MDR-3 | image= | caption= }}{{Infobox Aircraft Type | type= Arctic Transport Flying Boat | national origin=USSR | manufacturer= Chyetverikov | designer= Igor Vyacheslavovich Chyetverikov | first flight= January 1932 | introduced= | retired= | status= | primary user= | number built= 2 | developed from= | variants with their own articles=Tupolev ANT-27, Tupolev MDR-4, Tupolev MTB-1 }} |
The MDR-3 (a.k.a.11) was a long-range flying boat designed and built in the USSR from 1931.
Development
In 1931, Chyetverikov was commissioned to design a new long-range flying boat for MA (Morskaya Aviatsiya – naval aviation). 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. These commenced in January 1932 after the aircraft was transported to Sevastopol in the Crimea. Despite fast construction and excellent structural qualities, results of the flight tests were disappointing. Takeoff time was 36 seconds, climb rate less than a metre per second and the ceiling was only 2,200m. As a result project was transferred to KOSOS (Konstrooktorskiy Otdel Sektora Opytnovo Stroitel'stva – section of experimental aeroplane construction), as there was a 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)
{{Aircraft specs
|ref= Gunston, Bill. “The Osprey Encyclopaedia of Russian Aircraft 1875–1995”. London, Osprey. 1995. {{ISBN|1-85532-405-9}}
|prime units? = met
|crew= six
|length m= 21.9
|length ft= 71
|length in= 10.5
|span m= 32.2
|span ft= 105
|span in= 7.75
|wing area sqm= 153
|wing area sqft= 1,649
|empty weight kg= 8,928
|empty weight lb= 19,683
|gross weight kg= 13,973
|gross weight lb= 30,805
|eng1 number= 4
|eng1 name= BMW VI
|eng1 kw= 507
|eng1 hp= 680
|max speed kmh= 210
|max speed mph= 130.5
|range km= 1,600
|range miles= 1,000
|ceiling m= 2,200
|ceiling ft= 7,218
|climb rate ms= 4.76
|climb rate ftmin= 937.4
|armament = * 1 × machine gun in a nose mounting.
- 1 × machine-gun in a dorsal mounting.
}}
See also
References
{{reflist}}
{{refbegin}}
- Gunston, Bill. “The Osprey Encyclopaedia of Russian Aircraft 1875–1995”. London, Osprey. 1995. {{ISBN|1-85532-405-9}}
- Taylor, Michael J.H. . “ Jane's Encyclopedia of Aviation. Studio Editions. London. 1989. {{ISBN|0-517-69186-8}}
{{refend}}
{{Soviet scout designations}}
Category:1930s Soviet patrol aircraft
Category:Four-engined push-pull aircraft