Regarding piano rolls about airplanes, "Wait Till You Get Them Up
In The Air, Boys", by Albert Von Tilzer, was a very popular tune
in 1919 which made it onto phonograph records and sheet music,
so a piano roll of it would be a natural.

Bob Hodge

 [ One such piano roll is QRS 900, played by Osbourne & Howe, at
 [ http://pianorollmusic.com/rolldatabase.php?showpage=87&sortby=title 
 [ -- Robbie