For the same reason that the wheels on a car turn at different angles. It has to do with the radius of the turn at that point of the circle.
As Pete says, 2960s are very long floats. I seem to recall noting at one point that they are longer than 4580 and maybe even 4930 Beaver floats. They are great floats in lots of ways.
MTV
Makes sense, all I've ever had are a single rudder. Yes I have rudder envy :roll:
Glenn
Someone in Alaska offers a rudder enlargement option. I have one on my 1320's and had two on a previous model. Not sure of the source of parts. With two it becomes almost dangerous to turn them in a crosswind. They want to sink the outside float unless careful.
Gary
Yeap, here is my old PA-11-90 with the one over-sized rudder in some snappy winds.
I did this two or three times while my oldest son was supposed to be taking photos for my old training manual back around 2003.
I finally looked over and there he was talking to somebody and not paying one bit of attention.
Reviving this old thread as I have had issues with steering with my 2960's. Noticed during turns to the right that the right water rudder was partially coming up out of the water. Pulled my water rudder springs and found them deformed.So ordered a new pair from Kenmore and they came looking like a normal spring. Installed them and they helped significantly with the steering and keeping the water rudders down. I did verify previously based on this thread that the cables are in the correct holes. So here are my two questions:1) I look at the picture of Alex's water rudders and his look to have the same deformation as the ones I took off. Does that come from the design of having the spring come up through a hole in the steering arm which bends the spring at an angle when the water rudders are up?2) The floats in Alex's pictures shows two springs per water rudder, one on each side of the post. This doesn't appear to be standard from what I can see in the 2960 parts list and diagrams. Anybody else use two springs on 2960's?Thanks!The previous owner had the cables connected to the wrong holes on the rudder tiller. . ( I hate it when that happens) Skywagon Pete guessed that and photos proved it. So I changed to the correct location per EDO drawings and obtained more rudder deflection. The 20 knots winds have died and now it is raining buckets... So I have not seen how much it helps while underway just yet. ODDLY ENOUGH... All the other EDO 2960s in town are rigged incorrectly.
Look here... It calls for two springs per rudder.
http://www.kenmoreairharbor.com/uploads/9/6/8/3/9683162/edo_model_628-2960.pdf