Douglas aircraft water tanks

[w200/m880]

Ive done every google search i can for these water tanks,so over to you folks.
One has a tested date of 1949 part number 5136139-8
ac order 40652 serial 1544
date on both is blank

 

[vtdeucedriver]

Would not really be for the C-47, probably more for the C-54 as it would fly much farther and faster than the C-47 and would warrent having Potable Water.

 

[toptiger]

I doubt those water tanks were for human use. Some aircraft engines had water injection to boost hp when necessary for short periods. The shape of those tanks looks like they were designed to fit into a small area, like in the wing near the engine.

 

[w200/m880]

as you say look wing shape,nsn definately comes up as drinking water tank,both fitted with earth lead so permanantly affixed,both marked in us gallons and imperial gallons.

 

[toptiger]

you are quite right, it comes up as a water tank but nothing to indicate drinking water.
my point is that is not probably not for drinking water, but water injection for the engines and shaped to fit in the wings.

 

[w200/m880]

i put the aircraft order number into the computer and came up with c47 built in oklahoma for british contract,one did have a raf label on
The SAAF used two Dakota variants, the C-47A Dakota Mk.3 with Pratt & Whitney R-l830-92 engines and the C-47B Dakota Mk.4 with the R-1830-90C motors with two-stage supercharger allowing an increase in all-up weight from 29 300lb to 30 000lb. Our future "roadhouse" aeroplane was one of the latter and was officially designated a C-47B-5-DK (the suffix indicated it being built by Douglas Oklahoma plant) and was built on Contract No AC-40652 which included 305 aircraft for the UK government of which five were replaced by other models capable of towing gliders and 10 were diverted to South Africa.

 

[Scar59]

Most likely drinking water tanks as labled, anti detonation injection (ADI) water injection was a mix of distilled water, dromis B oil, and methanol.
The C 47s and C54s I maintained were not equiped w/ ADI, however the P&W R2800 equiped DC6 and Convairs were. The Convair carried one 15 gal tank and I think the -6 had a 22 gal tank. If the system was operational, the tanks would be drained during max power take off. Nice blue flame out of the exhaust stacks.
JC

 

[cobra5]

Those are water tanks built by Boeing for the C-47 and C-117 Skytrain.

 

[w200/m880]

any idea on where placed M Sgt