You might look at http://www.sailcenter.nl/v2/zeiltips.php?nr=7 for a nice definition of rudder stall. Bill Day M-15, 363, "Gee Whiz!" On Sun, Jul 18, 2010 at 10:33 PM, W David Scobie <wdscobie@yahoo.com> wrote:
the very VERY simple answer -
the rudder no longer controls the boat.
slightly more technical -
the angle of attack is so great that the water flow across the foil becomes greatly disrupted and the rudder can no longer keep the boat on course. the result is rounding-up:
http://en.wikipedia.org/wiki/Rounding_up (not really a good description of rounding up ... but a start)
on this wiki page, about aircraft wings, you can see pictures of a wing cross-section in a stall. the idea is the same -
http://en.wikipedia.org/wiki/Stall_(flight)<http://en.wikipedia.org/wiki/Stall_%28flight%29>
i'll now step away from the podium and allow those with more sailboat design and/or engineering ability to provide more information ... jerry m. maybe can give a better description/details.
dave scobie M17 #375 - SWEET PEA visit SWEET PEA's www-site - http://www.m17-375.webs.com
--- On Sun, 7/18/10, Daniel Rich <danielgrich@gmail.com> wrote:
I guess what I am asking is, what is stalling a rudder?
Daniel
On Jul 18, 2010, at 9:36 PM, W David Scobie wrote:
all rudders can stall.
the 15 will have weather helm if overpowered (like all boats _should_ when overpowered). she communicates to the person holding the tiller when the sail(s) need to be reduced. i never felt the M15 has any more 'weather helm' characteristics than other craft. she is 'sporty' and light in weight so you really know how the boat is performing. the difference in 'feedback' is marked between the 15 and 17 - both sail similarly, but the 17 is more forgiving and provides less feedback (all relate to size, a few feet long and a wider, and heavier, at least 1200 pounds).
i never took my 15 'to the edge'. there are other members that can discuss 'pucker moments'.
dave scobie M17 #375 - SWEET PEA former M15 owner visit SWEET PEA's www-site - http://www.m17-375.webs.com
--- On Sun, 7/18/10, Daniel Rich <danielgrich@gmail.com> wrote:
I read the review from Small Craft Advisor about the M-15. Really nice review. One thing they say is that the rudder can stall. What does that mean? It is a long and thin rudder, so somebody apparently replaced theirs with a shorter >>>broader one. Thoughts?
Daniel
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