I have a Kadet SR (biy) that I'm thinking of equipping with floats.It seems to be a rather popular airframe to convert,but I dont ever seem to see size/or source of the floats. I've been looking at the sig website,and they have 2 arf float sets and a float kit. They seem to go by airframe weight,not fuse length or wingspan.If I went only by weight,the 40 size floats would be fine.But on other sources they go by fuse length. The Kadet sr. is close in size to the 1/4 scale cub,but much lighter,and the recommended floats for that say good for models 16-25 lbs.
My thoughts are that the smaller floats,though able to handle the weight,would be pitch sensitive.And the bigger floats would be a better choice as it would be more stable,and the airframe can handle the extra weight of the bigger float.
Am I wrong?