JAE 21 Rudder Question

JayP · Jan 22, 2019

I am doing the final assembly of my JAE 21 and I have a few questions. I have attached an image of the rudder I got from ZippKits and I am wondering if you leave the bottom of the leading edge rounded or should I square it off before sharpening? As it sits now, the rudder is about 1 5/8”-1 3/4” below the bottom of the ski. Is the rudder too deep to start with?

On a separate subject, are you guys running the boat with 1/8” toe in on the right sponson or run it square and true? I know there are a lot of factors including building a straight hull, just wondering if the majority of you have incorporated toe in? I have the older G2 boat and it is built straight and true.

thanks for the help,

Jason

David Murany · Jan 22, 2019

Leave it how it is and round the bottom of the rudder. Also make sure the leading edge is sharp.

A longer rudder helps to hold the boat down the straights.

brad nichols · Jan 22, 2019

No toe in

Brad

Ron Zaker Jr · Jan 23, 2019

I run just over a 1/16" toe in on fin side. Personally I sharpen my rudder bottoms to a point. As Dave said rounding off also helps.

JayP · Jan 23, 2019

Thank you all for your input!

JayP · Jan 28, 2019

I am not questioning the designers at all, I am just wondering why not use boom collars instead of drilling and bolting the sponsons on the tubes? Wouldn’t it allow for quicker boom changes, toe in adjustments, etc.? Just curious.

BrianNeumann · Jan 28, 2019

That's what I did with my JAE 12. I cut 2 relief slits in the brass inserts on the sponson tubes and then use clamps out at the sponsons. Works great for me and has never slipped. But it is a 12 not a 21 so I cannot say whether the bigger boats will hold the sponsons tight.