I first heard about this movie in the book, Diesels West! by David P. Morgan

(Kalmbach Publishing, 1963, LOC #62-19987).  On page 64, there is a picture of the

Burlington Railroad's original 1934 streamliner, Pioneer Zephyr, with a Silver Streak

nameplate being filmed with crew, camera and mike booms visible. 

SPOILER ALERT !!!  Plot outline below:

The book further states on pages 55-56:

"In September 1934, No. 9900, temporarily renamed the Silver Streak, traveled to

Hollywood to star in an RKO film of that title.  Wallace W. Abbey wrote in Trains

Magazine that "all characters, including the train, lived happily ever after."  The

picture's plot unfolded like this:  Handsome young designer, in love with railroad

president's daughter, tries to sell president on newfangled streamlined train (i.e., the

Silver Streak, alias the Zephyr) but is rebuffed...Train is built but at first experiences

difficulty making 40 miles per hour and is ignominiously overtaken by steam engine

on freight train...Streamliner is on display at the (1934 Chicago Railroad) Fair when

president's son, at work on new Boulder Dam, contracts polio, requires an iron lung

(the acme of medical science in 1934)...Silver Streak races lung across continent

even as designer and foreign spy (who wants secret of two-cycle diesel) battle each

other for controls in the cab (RKO's script conveniently overlooked deadman's pedal,

which would have prevented the Zephyr from running wild with nobody at the

throttle)...Hero overcomes adversary, delivers iron lung (which saves president's

son), sells strealiner to railroad, wins daughter's hand in marriage."

SPOILER ALERT !!!  Plot outline above:

This film is not to be confused with the 1976 20th Century Fox picture Silver Streak,

starring Gene Wilder which was filmed in Canada using Canadian Pacific Railway

equipment from The Canadian.

For years, I was unable to find anything further on this 1934 picture until the

internet came along (Three Cheers for The Internet!!!).

You can read what IMDb has to say about this movie by CLICKING HERE.

I purchased my copy here:  http://stores.ebay.com/EMPORIUM-PICTURES

The Emporium Pictures link above sells quite a few old time railroad movies and is a

great resource.  I've also purchased the movies "Union Station" and "Titfield