You can work it out but consider this. The airplanes that are winning in any competition of any sort are better than all of the calculations or wind tunnel tests you can have. They have gone through the evolutionary process in the hardest way. Look at your airplane and determine what you want it to do. I am sure that there is a model of that sort somewhere. I would copy it with many thanks to the designer/flyer. You can always give it a bit of self by changing some non critical lines. It's the way most of the models are designed today.

Andy Lennon's designs being an exception, he marches to a different drummer.