Vaeltaja wrote:Tupolev SB-2 had comparable top speed and load as had Dornier Do 17Z & Do 215. All which were classified as light bombers. Some bit obscure or rare designs like Yak-2 or Bloch MB.170 were even faster with only marginally smaller bomb load. Douglas A-20 (or as was in French use DB-7B) was introduced only slightly after the Winter War but had completely superior performance to either. Polish PZL.37 Łoś, Heinkel He 111H, Ilyushin DB-3, Savoia-Marchetti SM.79 and Handley Page Hampden were bombers or medium bombers instead of light bombers but all had comparable performance to Blenheim - apart from bomb load which could be several times as high depending on type. Just how many you want there to be listed?
That's just plain rubbish. Let me illustrate that with this list, data by Raunio & "TNL":
Blenheim: 435 km/h (Mk. I), 450 km/h (Mk.IV)
DB-3M: 408 km/h (M-85), 437 km/h (M-87/88)
Hampden: 427 km/h
Do 17Z: 425 km/h
SB-M-103A: 385 km/h
DB-3M: c. 1.500 kg (racks for 2.000 kg).
Hampden: 1.500 kg.
SB-M-103A: 1.000 kg.
Do 17Z: 1.000 kg.
Blenheim: 972 kg.
Do 17Z: c. 5.900 kg
SB-M-103A: 5.534 kg
Hampden: 5.350 kg
DB-3M: 5.270 kg
Blenheim: 4.126 kg (Mk.I), c. 4.500 kg (Mk. IV)
As you can see Blenheim was the fastest, lightest and had the around same bomb load as SB and Do 17. SB's top speed is not even near the one of Do 17! Medium bombers like DB-7 would have been nice, but they were too large for Finnish aerodromes (900-950 meters of runway insted of Blenheim's 550 m).