There are times when you need to find out what the scale of your model is. For myself, often times I am wanting to replace the stock pilot but it doesn't do me much good if I don't know the scale of my model. Below you will find a simple three step method that will supply you with your answer so you can make the right choices for your model.
I acquired a Fly Fly ASW 28 and wanted to find a nice scale civilian pilot for it. The scale was never listed anywhere that I could find online so I knew I needed to find out the scale on my own. This is how I did it. (This same formula applies to any scale model).
The first thing I did was find out what the wingspan is of the full scale ASW 28. A quick search online told me the wingspan is 49 feet 3 inches ( or 15m / 588 inches).
The second thing I did was confirm my model's wingspan. In this case it is 99.60 inches (2.53m).
So in this example we have a full scale ASW 28 with a wingspan of 49 feet, and a RC model ASW 28 with a wingspan of 99 inches. To figure the scale, we do the following:
Take the wingspan of the full scale plane and convert it into inches (49 x 12 = 588).
Next we divide the full scale wingspan by the model's wingspan (588 / 99 = 5.939).
This gives you a ratio of the model to the full scale in inches which is 1" to 5.939" or in other words approximately 1/5th scale.
I hope you find this formula easy to use to help you determine your RC model's proper scale.