Technical data
Type MDR-4
Function Reconnaissance
Year 1934
Crew ?
Engines 3*750/830hp Mikulin M-34R
Length 21.9m
Wingspan 39.4m
Wing area 177.5m2
Empty weight 10500kg
Loaded weight 14660kg
Wing Load (kg/m2) 82.6
Power load (kg/hp) 6.5
Speed at 0m 232km/h
Speed at ***m 211km/h
Touchdown Speed 100km/h
Turn time 30sec
Range 2130km
Takeoff Roll 30sec
Ceiling 5450m
1000m 4.6min
2000m 10.3min
3000m 18.0min
4000m 31.0min
5000m 55.0min

MDR-4/ANT-27, A.N.Tupolev

28k at "History of aircraft construction in the USSR", Vol.1 p.526

Three-engined flying boat, development of the MDR-3 redesigned under A.N.Tupolev's supervision. Documents were transferred from I.V.Chetverikov team (Factory N°39) in February 1932, and in November 'new' design was ready.

Two tandem engine pairs of the MDR-3 were replaced by three (two tractor and one pusher) M-34R engines. Wing struts eliminated, wing area increased. Tail surfaces area was also increased, tail was raised like on the MK-1/ANT-22. The hull was almost identical to the MDR-3. Wing had mixed cover - aluminum on inner section, fabric on outer panels.

Aircraft was ready in March 1934. During factory tests it was crashed on takeoff, killing I.I.Pogosskij - head of the KOSOS Naval Brigade.

One built.



MTB-1 ANT-27bis

More Links...
  • MDR-4
  • ANT-27, Tupolev
  • MDR-4, Tupolev

  • References:
  • "History of aircraft construction in the USSR", Vol.1 p.526;

  • Modified December 4, 1997 Back to
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