When the &SON wants to strut his stuff,
He will normally run all 3 of the Red Bonnet Sante Fe F9's, the 2 RB SF B units, The 2 C&O F7s, both the F3 and PA-1 Army specials, the Army B unit and then just for good measure throw the 2 GP-40 UPs at the end.
Thats right, 12 engines on the Mainline...