The Adams Windsplitter (B&O, 1900 or so) is the first train to use principles of streamlining to reduce drag (and thus increase speed and economy).

AKAIK, it was still a heavyweight consist, so streamlining didn't help much.

UP M-10000 (City of Salina) outshopped Pullman-Standard some days before the Pioneer Zephyr rolled out of Budd's doors.

SO: M-100000 has precedence when we consider lightweight streamliners.

BUT!!! UP did not like development of Winton Diesel at this point (pre-201A). So they opted for a distillate engine to run the generator, not a Diesel.

SO: Pioneer Zephyr has precedence as Diesel streamliner.

Clear as mud???

M-10000 did not survive 1942. William Jeffers was either chair of War Production or War Materials Board. "Little Zip" was UP's very Public contribution to the wartime need for aluminum.

John

Thank you for your reply to my comments regarding the Flying Yankee. Sorry to have reversed the types of engines used on the "Yankee" and the 10000.

Could you direct me to possible photos of the 'Wind Splitter"? I am not at all familiar with that train. I am somewhat interested in the history of streamline design regarding trains and would very much look at the "Wind Splitter" design.

Thanks very much.