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Hesham,What is not Type 153?I disagree that Vickers used two drawing number systems in parallel, there is no evidence for that. The link you post is to a drawing of Type 123, subdivision 00 just means that bit is a general layout drawing. This aircraft is covered in the Vickers Aircraft since 1908 Putnam volumeYes of course Type 15396 is to spec. G4/31, it says that on the drawing. The picture you post is clearly yet another version; the engine is a radial. Of course the illustrations in the Air-Britain book are all of unbuilt projects, not actual aircraft. The aircraft Vickers actually built for G4/31 were a biplane (Type 253) and the monoplane Wellesley prototype (Type 246), two more completely different designs.
Hesham,
What is not Type 153?
I disagree that Vickers used two drawing number systems in parallel, there is no evidence for that. The link you post is to a drawing of Type 123, subdivision 00 just means that bit is a general layout drawing. This aircraft is covered in the Vickers Aircraft since 1908 Putnam volume
Yes of course Type 15396 is to spec. G4/31, it says that on the drawing. The picture you post is clearly yet another version; the engine is a radial. Of course the illustrations in the Air-Britain book are all of unbuilt projects, not actual aircraft. The aircraft Vickers actually built for G4/31 were a biplane (Type 253) and the monoplane Wellesley prototype (Type 246), two more completely different designs.
