Tall and skinny fore and aft, yes. Daniel On Jul 18, 2010, at 10:47 PM, Stan Susman wrote:
What do you mean by slender? I guess not fat? or tall and skinny fore and aft?
--- On Sun, 7/18/10, Daniel Rich <danielgrich@gmail.com> wrote:
From: Daniel Rich <danielgrich@gmail.com> Subject: Re: M_Boats: Stalling the rudder To: "For and about Montgomery Sailboats" <montgomery_boats@mailman.xmission.com> Date: Sunday, July 18, 2010, 10:38 PM
OK, so I am in my Vagabond and close hauled. Blowing hard. So, under that situation the boat will try to round up as it is overpowered. So, I then have to pull the tiller to windward to compensate, but if the angle of attack becomes too high, then the rudder loses "lift", and no longer is able to overcome the tendency to round up. Is that it? So, a slender rudder will be more likely to do this. OK, I think I get it.
Daniel On Jul 18, 2010, at 10:30 PM, Stan Susman wrote:
Daniel,
Think of the rudder as an airfoil or as a wing, a wing makes lift, a stall is the loss of lift from too high an angle of attack or too much load. A stall in an airplane is a good deal as when a wing stalls the load on the wing goes down,this is good because it keeps the wing from breaking. Same with a rudder only we have a small problem of loosing directional control, if that's not desirable then lighten the load on the foil (rudder) by letting the main out. Some boats react well to decreasing the aft rake in the mast, moving the center of effort forward and easing the load or side load on the rudder. Google wing lift to learn more. Hope this helps and doesn't cause more head scratching.
Stan --- On Sun, 7/18/10, Daniel Rich <danielgrich@gmail.com> wrote:
From: Daniel Rich <danielgrich@gmail.com> Subject: Re: M_Boats: Stalling the rudder To: "For and about Montgomery Sailboats" <montgomery_boats@mailman.xmission.com> Date: Sunday, July 18, 2010, 10:10 PM
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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