Thanks for your input CoosBayLumber & Peter C . I don't think I am going to have any problems incorporating ailerons into the center section of the wing only . I will simply have to add a piece for the aileron to hinge on , where the dyhedral wingtip sections begin , and split it behind the engine cowling section that drapes over the wing , for left and right application. This type of aileron is on many planes , including PBY's like the Catalina , and sailplanes with dyhedral wings. So , I am not reinventing the wheel. LOL

These types of modifications may seem like having to add alot of blocks to the design in the minds of some RC modelers , as they also seem to think that there are alot of blocks in the SeaCat kit , which there are not. The only "BLOCKS" , in the SeaCat kit are for the
familiar nosecone block that are in most kits , and the sponsons , which are also familiar in Seaplanes.

I have decided to decrease the dyhedral angle measurement by 50% , as a direct result of adding the ailerons. I have been giving the SeaCat alot of thought , thinking about that in 1954 , this plane had the rudimentary full tail lever and rudder design only as "steering". That would be the reason that the dyhedral angle was increased to a wopping 5" or so , where any more than that would almost be creating "fins" on the wings. This is what is involved in building such an old kit , it requires "thought" mostly , not extra parts that are not normally found on any RC airplane.

As Peter C suggested , the SeaCat was built during a time when model airplanes were primarily "freeflight" designs , or gliders. That was because there were no radios or servos to adjust them while in flight. So , if we understand that the SeaCat and other gliders of the time , would have been launched earlier without any controls , we should understand that dyhedral was the first construction adjustment made to attempt to control the area of flight that the plane would follow. Humerously , I have found some information that suggested that Bill Effinger and Henry Struck had these very problems at early competitions where the SeaCat had flown uncontrolled , but won the distance awards. Specifically , they had experienced that the gliders could fly into the next state , and they would not know where they would be able to retrieve the plane. Humerous , but it makes sense that with no dyhedral angle on the wings , your park flyer would become a county flyer in a matter of minutes , even though you had control over the tailwing and 1&1/2" rudder assembly. Needless to say "maximum dyhedral" had to be incorporated into the design.

This is what was happening in model RC airplanes at the time. A very humerous event , which makes me wonder about the boat bottom to sponson control area that I am modifying to incorporate the skid plate I referred to. It will be very small but what I am going to do is match the sponson bottoms to the skidplate. We are only talking about adding a 3-4" straight line across the back of the tapered trailing edge of the bottom , under the fuselage. In fact , the Catalina and others have that type of design , I feel that if I leave it out , I may find it difficult to steer at the point of initial water contact , possibly landing on the friction of a sponson and turning left or right , while trying to adjust with the ailerons at the same time. Bouncing back and forth on the sponsons is not something I want to do while landing , as soon as the skidplate touches the water , ( sponsons will make contact too ) , forcing the nose down steadily making the landing in a straight line.

I have to bear in mind that this plane was designed in 1954 when there were no options available to them at all. The more I look at the full sized drawing , I come to realize that the SeaCat is a compilation of designs , all honed into 1 plane.
For example we have as follows : A wide rowboat bottom , shaved at the front like a destroyer or battleship into a "V" for cutting
A submarine conning tower shape to provide good support for a large wing
A modern characteristic , center mounted , (single) above wing propulsion source
A narrowing helicopter style fuselage ( a result of the rear only controls )
A bomber wing and tail to create maximum lifting characteristics
Seaplane sponsons to aid the landing requirements
A cockpit designed forward of any engine water spray
The characteristics and size specifications of a sailplane or glider

This is not a simple water aircraft , it is an incorporation of designs , but the picture of the boat also makes it look like some sort of futuristic Orson Wells spacecraft. The box it came in is long , not square or rectangular as some pictures in magazines suggest. The box had probably been part of a shipping and packing design as well , packed like a cube.

Since I am also working on a sailplane ( GP Spirit Elite ) of the same size , I can make a close comparison as far as gliders go. In the future I am looking at building a ( Boeing 314 Pan American Clipper Seaplane ) , I see some plastic models , but nothing in wood. The Clipper is the plane with the adjustable lower water wing , that may also , be some sort of skidplate to assist in braking while near or on the water. Any suggestions or help finding a kit or plans to build a kit would be very much appreciated.

Thanks for the feedback .[8D]