G’day All!
Wrote a treatise on the Drover for this thread, then lost the lot! Blame Bill Gates.
Nervertheless, a couple of points;
Design; not loosely based, but directly from the Dove with 3x Gipsy Major 10 Mk2 and a tailwheel [3 Chipmunks in close formation.] Fuselage a bit shorter and rivetted wings, not Redux bonded. It was felt that the Gipsy’s and a tailwheel would make it easier to maintain in the bush [one version of the story anyway.]
Development; leaving aside the VP prop drama’s [they fell off a couple of times!], the Mk1 and 2 had Gipsy’s, the Mk3 Lycomings. The intention was to have a modern post-war mini-airliner to take over from the Dragon. RFDS didn’t use the a/c directly until the late 50’s with Qantas and then TAA providing a/c at times in Western Queensland.
Trust that helps a bit. 🙂