Technical data
Type TB-1P
Function Torpedo Bomber floatplane
Year 1929
Crew 6
Engines 2*500/680hp M-17
Length 18.90m
Wingspan 28.7m
Wing area 120.0m2
Empty weight 5016kg
Loaded weight 7500kg
Wing Load (kg/m2) 62.5
Power load (kg/hp) 5.51/7.5
Speed at 0m 186km/h
Landing Speed 90km/h
Landing Roll 150m
Takeoff Roll 660m
Turn time 40sec
Ceiling 3620m
1000m 7.1min
2000m 17.2min
3000m 33.2min
Guns 6*7.62mm DA-2
Bombs 1000kg inside or one torpedo

TB-1P by A.N.Tupolev

8k b/w drawing of TB-1P, "History of aircraft construction in the USSR", Vol.1 p.375

Since the TB-1 was ordered as a naval torpedo/bomber (see prototype page), it was natural to install it on floats and fulfill the original program. Talks about converting TB-1 to floatplane started on January 15, 1926. But practical efforts did not start until 1928, because team was too busy with trials and introduction of TB-1 into mass production.

In 1929 modified Junkers floats were installed on 'Strana Sovetov' for its record flight. But this type of floats was found unsatisfactory for mass use. In October 1929 the UVVS ordered several pairs of various size floats from Short (Great Britain). Those floats were made of duralumin with steel joints. Construction was very clean, trials at TsAGI hydrochannel confirmed high quality. Sample floats intended for 7-8tons aircraft were introduced into mass production as 'Type G' (see data below).

10.66m1.15m1.15m 7.25m3 each816kg (pair with struts)

Results with TB-1P were good. Seaworthiness was above average, no problems during landing and takeoff. 'Type G' floats were in production in 1932- 1935, more than 100 pairs were assembled. Few dozens of TB-1 were equipped with this type of floats and served in military (as TB-1P, Poplavkovyj, floatplane) and as civil (under designation G-1).


Series TB-1

  • "History of aircraft construction in the USSR", Vol.1 p.375-376;
  • ANT-4 / TB-1 at the Virtual Aircraft Museum
  • ANT-4, Tupolev
  • TB-1, Tupolev

  • Created April 23, 1998 Back to
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