- Development
- Variants
- Specifications (B-10)
- See also
- References Notes Bibliography
name=Bratukhin B-5 | image= | caption= }}{{Infobox Aircraft Type | type=Transport helicopter | national origin=Soviet Union | manufacturer=Bratukhin | designer= | first flight=1947 | introduced= | retired= | status= | primary user= | number built=1 (B-5) 1 (B-9) 1 (B-10) | developed from= | variants with their own articles=Bratukhin B-11 }} |
The Bratukhin B-5 was a prototype Soviet twin-rotor transport helicopter designed by the Bratukhin aircraft design bureau. DevelopmentThe B-5 was an improved and larger design based on the bureau's earlier G-4, a twin-rotor helicopter, with each rotor driven by an Ivchenko AI-26 radial engine. Each engine was housed in a pod on an outrigger with the related rotor above. The programme was delayed waiting for appropriate engines and the B-5 was not completed until 1947, it only made a few short hops before the programme was abandoned due to vibration and structural flexing. An air ambulance variant, the Bratukhin B-9 was built but was abandoned without being flown.[1] Another variant was the Bratukhin B-10 which had uprated 575 hp (429 kW) engines and was modified for use in the artillery observation role with the military designation VNP (Vosdushnii Nabludatelnii Punk - Aerial Observation Point). The B-10 had three-seat for the crew, the cabin could hold three passengers or equipment. The B-10 flew in 1947 but although it did not have the wing stiffness problems of the B-54, demonstrating adequate handling like the B-5 and B-9 was also abandoned.[1] A variant with an improved performance was built as the Bratukhin B-11. Variants- B-5
Prototype, one built. - B-9
Prototype air ambulance variant, one built. - B-10
Prototype observation and reconnaissance variant, one built. Specifications (B-10){{Aircraft specs |ref= |prime units?=met |genhide= |crew=3 |capacity=3 or additional equipment |length m= |length ft= |length in= |length note= |span m= |span ft= |span in= |span note= |upper span m= |upper span ft= |upper span in= |upper span note= |mid span m= |mid span ft= |mid span in= |mid span note= |lower span m= |lower span ft= |lower span in= |lower span note= |swept m= |swept ft= |swept in= |swept note= |dia m= |dia ft= |dia in= |dia note= |width m= |width ft= |width in= |width note= |height m= |height ft= |height in= |height note= |wing area sqm= |wing area sqft= |wing area note= |swept area sqm= |swept area sqft= |swept area note= |volume m3= |volume ft3= |volume note= |aspect ratio= |airfoil= |empty weight kg=3019 |empty weight lb= |empty weight note= |gross weight kg= |gross weight lb= |gross weight note= |max takeoff weight kg=3900 |max takeoff weight lb= |max takeoff weight note= |lift kg= |lift lb= |lift note= |more general=
|eng1 number=2 |eng1 name=Ivchenko AI-26GVF) |eng1 type=radial piston engine |eng1 kw= |eng1 hp=575 |eng1 kn= |eng1 lbf= |eng1 note= |power original= |thrust original= |eng1 kn-ab= |eng1 lbf-ab= |rot number=2 |rot dia m=10.00 |rot dia ft= |rot dia in= |rot area sqm= |rot area sqft= |rot area note=
|perfhide= |max speed kmh=218 |max speed mph= |max speed kts= |max speed note= |max speed mach= |cruise speed kmh= |cruise speed mph= |cruise speed kts= |cruise speed note= |stall speed kmh= |stall speed mph= |stall speed kts= |stall speed note= |never exceed speed kmh= |never exceed speed mph= |never exceed speed kts= |never exceed speed note= |minimum control speed kmh= |minimum control speed mph= |minimum control speed kts= |minimum control speed note= |range km=440 |range miles= |range nmi= |range note= |combat range km= |combat range miles= |combat range nmi= |combat range note= |ferry range km= |ferry range miles= |ferry range nmi= |ferry range note= |endurance= |ceiling m= |ceiling ft= |ceiling note= |g limits= |roll rate= |glide ratio= |climb rate ms= |climb rate ftmin= |climb rate note= |sink rate ms= |sink rate ftmin= |sink rate note= |lift to drag= |wing loading kg/m2 |wing loading lb/sqft= |wing loading note= |disk loading kg/m2 |disk loading lb/sqft= |disk loading note= |power/mass met= |power/mass imp= |power/mass note= |thrust/weight= |thrust/weight note= |more performance= }}
See also{{aircontent |see also= |related=- Bratukhin G-4
- Bratukhin B-11
|similar aircraft= |sequence= |lists= }}ReferencesNotes1. ^1 Gunston 1995, p.64.
Bibliography{{refbegin}}- {{Cite book|author=Gunston, Bill|authorlink =Bill_Gunston|title=The Osprey Encyclopedia of Russian Aircraft from 1875 - 1995|publisher=Osprey Aerospace |location=London|year=1995|isbn= 1-85532-405-9}}
- {{cite book |last= Nemecek |first= Vaclav |title=The History of Soviet Aircraft from 1918 |year=1986 |publisher=Willow Books |location=London |pages= |isbn=0-00-218033-2}}
- {{cite book |last= |first= |authorlink= |coauthors= |title= The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985)|year= |publisher= Orbis Publishing|location= |issn=|pages=}}
{{refend}} 5 : Soviet military utility aircraft 1940–1949|Military helicopters|Abandoned military aircraft projects of the Soviet Union|Bratukhin aircraft|Soviet helicopters 1940–1949 |