"Larry W4CSC" skrev i en meddelelse
...
"Flemming Torp" fletopkanelbolle2rp.danmark wrote in
:

When will my boat run fastest: 'Free' running propeller
or
fixed/locked propeller? ... Simple question, complicated
answers, I understand ...


When you replace the prop with a folding prop that has
nearly zero drag.
It does make a difference. I'm not crazy about a prop
with so much
underwater mechanical parts, myself. Those little
critters with the little
shells must be of some nuisance to a folding prop with
cracks in them.

Freewheeling would seem to produce less drag than it being
locked up
dragging, with no load on the prop. Ever notice how quick
the dingy stops
when the outboard motor just locks up as opposed to drops
to idle speed
still turning the prop slowly?

I'm also told some transmissions will not tolerate
freewheeling. Case in
point is when we got this "new-used" Perkins 4-108 from
another boater, the
transmission on it was much smaller than the original one
in Lionheart on
her old Perkins 4-108. The mechanics said to keep this
"fluid drive"
larger transmission because it was made to freewheel for
the alternator.
The small transmission was not. I've never seen why,
though, and don't
know why.

Oh oh...this is getting too long, again....sorry.

I'm still learning - and reading with great interest ... I
just wonder whether Roger is in agreement ;-))

--
Flemming Torp