Originally Posted by
LiPo Power
That is why I have this concern about the rudder mounting on its hinges.
My rudder is not "tight" either... under way, however, the forces on the rudder pretty much pin it back and hold it straight, unless you turn it...
I've had some pretty loose rudders and they've never been this kind of an issue.
The instability you are experiencing is being caused by the hull lifting out of the water and not having enough control surface remaining in to keep it stable. Again, this is due to the flat bottom at the back half of the hull, and the sub-surface prop design. It's NOT really a "deep V" hull... it starts that way, but then quickly turns into a flat bottom. The combination can be a tuning challenge.
Also, I think getting a longer rudder would help in left-hand turns. As it is, when the boat rolls into the left turn, the rudder is almost lifted out of the water. It can be made to work, but you have to drive it correctly. It won't do it well at higher speeds, so you have to back off, set the nose down into the turn, then ease back into it. It's still touchy that way, but it works. A longer rudder... maybe another 1/2" or so, would help a lot.
The stock rudder can be made to work fine, however. That's what mine still has. I WAS thinking of maybe remounting down lower on the hull.
Bending out the turn-fins will help IMMENSELY in the turns. It'll stop fighting them. As they come stock, they try to force the boat back upright in the turn and it "jacks" on them. VERY unstable. Bend them out so they are 90-degrees with the bottom on each side, and you'll find the cornering much improved.
Darin E. Jordan - Renton, WA
"Self-proclaimed skill-less leader in the hobby."
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