Originally Posted by Delancey
If I am not mistaken there are some races that require an emergency rudder set up. Most I have seen tend to favor a cassette arrangement. My boat is shoal draft
with a spade rudder almost as deep as the keel
and no skeg. Making an emergency rudder is on my list. They don't have to be beautiful to work.
You're correct on this. It's one of the points which I tried to hammer home in SmackDaddy's Rudder Failure's thread. And the early portions of the thread, plus some of the info which I put in on what kinds of loads rudders see (and are often GROSSLY underestimated), plus preventative maint., are worth reading.
About boats with fin keels losing their rudders being more difficult to balance than full keeled boats, yes, it's true. And like you noticed, the boat's more controllable at lower speeds when this happens. Which may be your only choice. But then, you're only trying to limp into the nearest port under such circumstances anyway.
One other thing came to mind, & that is, that without a rudder, I'm thinking that a boat'll behave much as if it has a SERIOUS case of weather helm
. So applying the usual fixes for that condition could/should prove somewhat helpful. Especially as, again, we're making the boat a bit more docile.
That, & likely, shifting as much weight aft (and to weather) as possible would help some, as it'd immerse more of the hull
aft, & thus, to some degree, the CLR will move (aft) with it.
To get a good, or better feel for steering via the sails
, it's helpful to take out something small to practice with. Like say a J-24, where you can literally sit on the cabin
top with the boom in your hands & steer the boat.
On that design (and a lot of others, even 12m's), how the main is handled/positioned can be of sufficient magnitude to completely override the rudder.
Likely a windsurfer or Laser would be a good practice tool too.
And on all of these small boats, one gets a lot more feedback (learning) in terms of how weight placement affects things as well. Given that your body weight is fairly large in relation to the boat's displacement
For emergency rudders on non sugar scoop transomed boats, you can have a set of massive, pintles & gudgeons made relatively inexpensively. Well,for like a few hundred $. And then do some serious reinforcing of your transom prior to mounting them (I can't emphasize this enough).
Your emergency rudder should be stupid strong. Kurt Hughes
has some good info on how foils fail, & some wisdom on building reliable ones. And once the rudder's built, it can be stashed in that bunk you use as a catch all, or mounted to the overhead somewhere down below.