information on the only DC3
In the very dim past, I ran a number of pilot engineering schools for DC3 endorsements. One of the OEM manuals had some words regarding a trim target in the aft region of the envelope for fuel considerations .. would have the manual in the archives somewhere but a major problem to find it ..
keep the load in the "Tested for C of A." position, rather than (b) "for minimal cruising drag".
Not a case of keeping to the forward limit .. that only is relevant for the certification determinations .. most folks would aim for the mid to aft region of the approved range.
Load sheets were graphical and could have had an extra line printed, between the limits, to indicate the " Optimum Loading"
Absolutely, as such a line is just a CG location. As I recall I did just that for one DC3 operator years ago .. again, based on the OEM guidance material. Very flexible and useful loading systems are trimsheets.