...sometimes it is very difficult to see what is going on & we can get confused......especially from 22,000km away...
Hi Derek,
seems you are measuring distances from Down Under.
I think Danielle is spying not more than
some 8000 km into the Wild Blue Yonder.
1. from the image of the real vessel I see port prop as anticlockwise rotation + stdb prop clockwise rotation for fwd motion [contra rotating outward turning]
2. from your model I see port prop as clockwise rotation + stdb prop anticlockwise rotation for fwd motion [contra rotating inward turning]
Just an observation...
Though correctly observed, in Danielle's place I would wait until her model of CM is ready for her first "sea" trials,
and then decide on whether letting the props turn outwardly or inwardly from the outcome of trials with respectively different arrangement.
I think for twin screw propulsion on real ships it cannot definitively be determined which arrangement is to prefer in general and both constellations can be found,
although I think that a slight majority of ship operators let the props turn outwardly.
Afaik, there aren't even distinct recommendations for either constellation that could be based on scientific evidence despite some research in this area by ship model basins, CFD analysis and ship hydrodynamicists´ experience.
Especially in model scale often the manoeuvrability can be considerably improved when letting the props turn inwardly (albeit this might relate to a single centre line rudder arrangement).