"Gene Kearns" wrote in message
...
On Thu, 15 Jun 2006 21:20:00 -0400, "RCE" wrote:



I think one of the outboard manufacturers (Mercury?) tried to introduce an
"automatic" variable pitch prop many years ago that had two pitch
positions.
It was costly, problem prone and it's performance wasn't any better than a
properly sized fixed pitch prop. The prop was a flop.


I think you may remember these guys...... and they are still
around.....


http://www.land-and-sea.com/marine/t...rque-shift.htm


That's likely what I remember - the tests with the Merc outboard. Time
frame is about right too - the articles date back to 1990.

It's interesting that although they sell parts for the prop on the site, but
I didn't see any offerings of the prop itself.

RCE

www.eisboch.com