As you say Malcolm, I have made up my mind I'm not sure!
I know the LAA mandate a max of 1625 mm (based on clearance calcs in CS-VLA,
which
is not a requirement for LAA aircraft, but that's another argument!)... they
don't insist on 3 blades - Andy Draper said they have lots of 3000/2W listed
for Sport Cruisers, but I guess they have the ground clearance to allow for
longer blades...
I suspect 3 blades may be necessary to keep a decent blade area for 1625
diameter
(with a 1650 you have more area, so can get away with 2 blades I guess).
So now it's *just* a choice of wide vs. normal:-
Data showing W is better for 914 - but does this apply equally to 912S?
or a subjective comment "If I started again I would go for the normal ones"
(like
you, I think that's what he means).
Decisions, decisions!
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http://forums.matronics.com/viewtopic.php?p=393859#393859
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