Second Air Force wrote:
Last time we were at Maxwell I ran across the documents that outline the post-war Silverplate/Saddletree/GEM B-29 modification program. When the USAF decided on the number and configuration of Superforts they wanted converted to strategic (nuclear-armed) configuration it was decided that all Silverplate/Saddletree mods would be done to Wichita-built airframes in order to standardize equipment. The Martin, Bell, and Renton airplanes were used for conventional bombing, training, tankers, etc, and the RAF got a bunch of B-29As. The A carries a bit less fuel than a standard B-29 due to the wing center section design, and it was felt that the RAF was closer to potential targets so could "get by" with a little shorter combat radius.
Scott
Yeah, I always liked the design of the Wichita wing (left and right joined at BodyLine zero with tapered spar caps overlapping), vs the Renton "let's build a box and stick 'em to the side of the fuselage". I always wondered what all went into that decision, and if it had anything to do with the facility originally being designed to produce flying boats and also having an overlap of B-17 to B-29 production. It seems like they painted themselves into a corner on that one. That evolutionary split continued forward on that path with the modeling based on that assumption. Now the 787 has rework ongoing to fix that area. Had they joined the wing at zero within the confines of the body the cfrp strips could have been continuous from the wingtip to the center of the a/c.
Thanks for the info about the additional fuel, I did not know that. I read that even with the additional 6 inches of wingspan from the A version that pilots had remarked the performance (handling/speed) was negligible.