slow truning rigger

David Murany · May 26, 2013

Two things...

First widen the sponsons out to about 14" inside to inside. Second find the center of gravity of the boat by setting it on a dowel til it balances on it. Then you want the trailing edge of the fin about an inch in front of that. When its too far forward its harder for the boat to pivot around it. Hope this helps.

Dave

wayne middlemiss · May 27, 2013

my way of thinking with the set up would be definently widen the track width of the sponsons 4" right , 4 1/2" left and move the turnfin to the rear of that bracket already there, apl 60/40 turnfin a@ around the 50-55% mark. going forward will make the back of the boat overtake the front and become a real dog, when you get some serious power saddled up in it .

dr gary turner · May 28, 2013

It looks like the bracket holding the turn fin is hanging down below the running surface of the sponson. If not below it is too close. You are getting a lot of drag from the bracket. It may just be the picture that makes the bracket look to low.

James montgomery · May 30, 2013

Its above the running surface I cheack. Think mifht mess with the sturt angle and that get a good set up and power in it.

Mike Betke · Jun 6, 2013

Just saw this for the first time. Widen the sponsons out to 14 inches as Dave said. The tub can be centered in between the sponsons. Put a 30 degree bend on the turn fin.

That boat is over 18 years old and I don't remember the set up from back in the day. I would make a new turn fin that is deeper and with a roll on it. If the boat is turning slow, are you sure that you have enough servo for it or that it is good? How much throw is on the rudder servo? We probably had a lot more throw way back when.