OK Mich,

I'll talk to you about props. I have both, a folding Martec with
streamlined tips and a fixed Standard Martec. Both 13x13. Both are
2-bladed.

The folding prop is the better prop. Less drag sailing (But not as much
as you would think when the fixed is lined up with the keel;-less than
1/2 knt) More speed under power, same stopping distance from both high
speed and medium speed.
Backing; Lousy. Doesn't even compare to the fixed. I can back away from
my slip at low RPM like I back my car out of the garage. There really is
no low RPM backing with the Folder, Which causes stern walk.

This isn't a small item. After racing season I change props. I use the
Standard for "Knocking About" This means I have to aligned my shaft. A
PITA when single handing. I aligned the folding prop also but it isn't
as critical.

I can't tell which one I like the best. I don't know. After 10 years I
still don't know. Since I believe in having a spare prop, the two I have
work out just fine.

By the way, I have nothing but praise for the Martec Company. They has
always exceeded my expectation.

Ole Thom