The following free downloads are provided for the use of PMDG customers who need a convenient download location for the associated documentation.  These pdf documents are the intellectual property of PMDG Simulations and are the for the private, non-commercial use of its customers. (Please see EULA for your product for more information.)

PMDG DC-6 for Microsoft Flight Simulator:
PMDG DC-6 for MSFS - Introduction (PDF)
PMDG DC-6 for MSFS - Pilot Operating Handbook(PDF)
PMDG DC-6 for MSFS - Mouse Options How-To (PDF)