[quote=tamumpower1][quote=catmodding]Don't know about the H rudder setup , but could it be a rudder
popping out of its locked position only by a inch or so?
On my old P18-2 the rudder sometimes popped out of its position
at high speed, it didn't go up all the way, just a inch or two.
It was impossible to steer then.
Just a suggestion.
Grtz, A[/quote]
The 18 uses a rotating cam with groves in it that a spring loaded plunger locks into when the rudder is all the way down. It is possible that the rudder could kick up a little before disengaging the cam. The speed would depend on the spring pressure being used. I don't think it would be partially kicked up enough to give it the same feeling as when the rudders are straight out but I can definitely look next time it happens to see if that is what is happening.
[quote=Dogboy]Boat props cavitate and pump impellers cavitate. Sailboat foils do not cavitate - they ventillate and/or stall.
One thing you didn't mention is what do you have to do to make the "locked up" condition go away?
Also, what type of rudder blades are you running?
sm[/quote]
Interesting. I thought I read before that a dagger or rudder with an unsmooth surface could cause cavitation but I guess a detached flow situation makes more sense.
The rudders are EPOs. One time it came and went away quickly. Maybe the 4th time it happened I really focused on it and it appeared that there was really nothing I could do to fix the rudders being stuck but just wait a second or two for it to go away. The whole time I was yanking on the helm and when it came unstuck it felt more like they came unstuck when they wanted to and not from anything I was trying to do to get them unstuck.
When the rudders are out of the water they rotate very freely. The annoying this is I take them off the boat and clean/grease everything every other month or so. 99% of the time the rudders are great. But when the helm locks up and I have the spin out it freaks me out a bit.[/quote]
No HTML tags allowed (except inside [code][/code] tags)
