Xtra, Dennis has given you an excellent tutorial on adding ailerons to a three control airplane however doing so will only detract from its intended performance and do nothing to its ability to handle winds.

Now not familiar with that particular Herr product but most of their kits are intended for very lightly loaded flight and are generally small airplanes. Rud/elev operation can handle winds just as well as rud/elev/ail can. There are a number of design factors that relate to the ability to handle wind with a heavy wing loading the predominate one. Adding ailerons on that airplane will add enough weight to hamper its performance but certainly not enough to make it a pleasant flyer in high winds.

In my opinion you will get more satisfacton by building and flying it as the designer intended.

By the way the only advantage of four control over three is during takeoff in a crosswind and with the prefered t/o method for that kind of airplane being a hand launch straight into the wind the arguement for ailerons is moot.

John