From the web page…..
http://www.winthrop.dk/bounty/model.html
"An article from a contemporary issue of Popular Mechanics Monthly entitled Old Sailing vessels "made up" as famous ships for the movies about the rebuilding of the vessels for use in the 1935 Mutiny on the Bounty film has been found at the J. Porter Shaw Library at the San Francisco Maritime Historical Park. It also contained this information:
Only twenty-seven feet long, this miniature Bounty reproduces the larger vessel in every detail and is perfectly seaworthy. In addition to a full set of sails, it carries an automobile engine geared to a concealed propeller which kicks the tiny ship along in realistic style. Fitted with bouyant tanks, it was โwreckedโ on the California coast, and later repaired for exhibition."