ADVANTAGES

From this point sizing becomes an iterative process of working with the components for which the weights are known, ie electronics, and then working to take a first guess of what the airframe will weigh. This can be difficult to do so it is best to itemize the components and then work to build up an entire airplane. For example the weight of the wing could be approximated by approximating the weight of the material that will be used to make the spar, then guessing how many sheets of balsa it will take to build the wing ribs, and cover the wings. Additionally components such as the leading edge and possibly a drag spar must be considered. It is best to have some of the materials on hand at this stage because it will allow for accurate measurements of weights.

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