eBay: Boeing B-17 Flying Fortress

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johnbr said:
B-17. Pilot training manual for the Flying Fortress B-17. Contents

Fuel System

The fuel system of the B-17F consists of 4 independent fuel supplies of approximately equal capacities, each feeding one engine. There are 3 tanks in each wing, with provisions for 2 additional groups of outer wing feeder tanks. These outer wing feeder tanks (Tokyo tanks) are composed of 9 individual, collapsible self-sealing cells per wing. The fuel supply can also be increased by auxiliary installations of re-leasable fuel tanks in the bomb bay.

The fuel in any tank is available to any engine supply tank in the airplane through a fuel transfer system consisting of 2 selector valves and an electrical transfer pump.

There is also a hand transfer pump in the bomb bay as an emergency transfer medium. Fuel booster pumps in the outlets of the 4 major wing tanks eliminate vapor lock between the tank and the engine fuel pump. They also provide fuel to the carburetor when the engine pump fai
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johnbr said:
View attachment 356585 View attachment 356586
Click to expand...

In the wing spar these 3 bigger lines are hydraulic ?
 

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*WWII photo- B 17 Flying Fortress Bomber plane Nose Art - THE SHAMROCK SPECIAL* | eBay

42-29591 | American Air Museum in Britain B-17F-60-BO 42-29591 Delivered Cheyenne 12/1/43; Rapid City 21/2/43; Kearney 12/3/43; Salina 31/3/43; Memphis 8/4/43; Dow Fd 16/4/43; Assigned 336BS/95BG [ET-K] Alconbury 22/4/43; 2m, transferred 401BS/91BG [LL-Z] Bassingbourn 16/6/43; AFSC 15/4/44; Returned to the USA 4135 BU Hill Fd 22/6/44; 617 BU Tooele 1/3/45; Reconstruction Finance Corporation (sold for scrap metal in USA) Kingman 13/11/45. THE SHAMROCK SPECIAL.


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*WWII photo- B 17 Flying Fortress Bomber plane Nose Art - ACK ACK ANNIE* | eBay

42-32095 | American Air Museum in Britain Delivered Cheyenne 28/1/44; Kearney 11/2/44; Presque Is 25/2/44; Assigned 457BG Glatton 14/3/44; transferred 322BS/91BG [LG-L] Bassingbourn 16/3/44, first NMF ass. to 91BG; {143m inc group's last 25/4/45} Returned to the USA 121 BU Bradley 11/6/45; 4168 Base Unit, South Plains, Texas 16/6/45; Reconstruction Finance Corporation (sold for scrap metal in USA) Kingman 13/12/45. ACK-ACK ANNIE.

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As an eBay Associate we earn from qualifying purchases.
spark802 said:
In the wing spar these 3 bigger lines are hydraulic?
Click to expand...

Without knowing much about the hydraulic system of the B-17, it looks like it from that picture you supplied. The rigid lines go to a switching and distribution valve or some such thing, usually actuated by hydraulic pressure when a function like opening bomb bay doors or raising and lowering undercarriage is required.
 
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