Originally Posted by
megan
Fuel System, main tanks are integral, aux tanks collapsable rubber bags.
What was the source of that fuel system schematic and what model does it apply to?
The NTSB report on the ground fire event indicates one aux tank in each wing. I'm attaching a fuel system schematic extracted from "
Douglas C-54B-D-E/R5D-2-3-4 Airplanes Flight Operating Instructions" which is for sale on eBay but you can scroll through and view the pages. It also shows one aux tank per wing.
I have seen nothing that indicates the wing aux tanks were bladders although the fuselage tanks do appear to have been.
Douglas C-54B-D-E/R5D-2-3-4 Airplanes Flight Operating Instructions Original - eBay source
Better resolution image from same source