The Myasishchev DB-108 was a 1940s Soviet experimental development of the Petlyakov Pe-2 bomber aircraft. Only three prototypes were built and only two of them flew.
Design and development.
After Vladimir Petlyakov's death in January 1942 Vladimir Mikhailovich Myasishchev continued the development of the Petlyakov Pe-2, beginning with the DB-108. DB stood for long range bomber and 108 was a NKVD, rather than design bureau, number. The three prototypes were identified by their designer's initials, VM.
All three had the same basic layout. Their cantilever wings were mid-mounted and had rectangular panels between roots and engines, with radiators in their leading edges. The engines were mounted ahead of the leading edges in long fairings that also housed the main landing gear. The oil radiators were nearby in the leading edges of the outer wing panels which tapered strongly to semi-elliptical tips and had about 5° dihedral.
Their fuselages were oval in cross-section and tapered rearwards to pointed extremities. Each had a glazed or semi-glazed nose and a cockpit, under raised, multi-part glazing, placed ahead of the leading edge. At the rear tetragonal plan, mid-mounted tailplanes with marked dihedral carried vertical endplate fins which, with their rudders, were roughly oval in profile. The trailing edges of broad chord elevators were slightly curved, with inboard trim tabs. A retractable tailwheel was positioned just ahead of the tailplane leading edge.
The first prototype, the VM-16, was crewed by just a pilot and navigator/gunner/bomb-aimer, seated alongside but facing rearwards. He remotely operated a calibre tail gun from this position but went into the semi-glazed nose for bombing. Development concentrated on increasing defensive armament. The ground-tested but unflown second prototype, the VM-17, added another crew member to operate its four guns. It was eventually modified into the Myasishchyev VB-109, described briefly below. The final prototype, the VM-18, had a 16% increase in span and 10% in length, with a fourth crew member in an extended rear cockpit to operate its guns, one in his cockpit and two more in remotely operated dorsal and ventral barbettes. There was also a forward firing gun.
The VM-16 was first flown on 30 December 1944. The VM-17 was not flown until late 1945, after modification into the VB-109; the VM-18 was flown in 1946, though flight tests were not completed before programme cancellation.
Variants.
Data from Russian Aircraft 1875-1995
Specifications (VM-16).
"Data from" "Russian Aircraft 1875-1995."General characteristics* Crew: Two* Aspect ratio: * Propellers: Four-bladed VISh-107
Performance* Endurance: * g limits: * Roll rate: * Maximum glide ratio: * Time to altitude: 5 min to*Take-off distance: 
Armament
See also.
Related development
Aircraft of comparable role, configuration, and era
Related lists
References.
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