Boeing XP3B-1 (Model 466) Maritime Patrol aircraft

[hesham]

Hi,

the Boeing Model-466 P3B was a patrol aircraft project,and
powered by two 5200 hp XT40-A engines,driving contra-
rotating airscrew;
has anyone a drawing to this Model ? please.

 

[hesham]

Hi,

if you have not a drawing,can you tell it was a flying boat
or normal aircraft ?.

 

[lark]

The Boeing Model 466 was a land-based long range patrol aircraft
powered by two 5.200hp Allison XT-40 engines driven contraprops.
Span: 110ft. Lenght 90ft6in.Gross weght :92.000lb.
Tanden type undercarriage with outrigger wheels in engine gondola's.

service designation : XP3B-1 - type not built.
Boeing Aircraft since 1916 - Peter M.Bowers. Putnam .London1989.

 

[elmayerle]

Given the engines, it would've been unsuccessful, anyway. The Allison XT40 was the ruin of a number of otherwise good aircraft (Convair Tradewinds, NAA TurboSavage. Douglas Shyshark, etc.) and was two gas generators of the similarly unsuccessful XT38 driving a common gearbox. The XT38 went through a complete re-design to become the T56 and a corresponding development of the XT40 was proposed as the T54 but never built.

The overall description sounds roughly like a XB-55 derivative with only one engine pod on each side.

 

[hesham]

Thanks my dear lark.

 

[lark]

Very close Evan but the wings and tailplane were not swept..

 

[Orionblamblam]

Drawings.

 

[hesham]

Thanks dear Orion.

 

[overscan (PaulMM)]

From Boeing Aircraft Since 1916 by Peter M. Bowers:

 

[hesham]

Thank you my dear Paul (Overscan).

 

[VictorXL188]

Two questions that spring to mind is which US Navy requirement was the Model 466 designed to meet, is this the one that was fulfilled by the Neptune?
Second question is, was the four engine variant designed because of the perceived unreliability of the XT40 in a similar way to the Manchester being replaced by the Lancaster?