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Hi rb1957! The current example is intended to cover a full analysis, but a very simplified one; the model can be improved by changing every parameter with later iterations/additioms. Regarding moments/Cm, I did something a bit against the rules. Instead of working with Cm, I have followed...

Thanks rb1957! As a starting point, I am trying to calculate a moderate deflection, within the elastic range. Instead of the original cantilever wood wing, I have come up with a tube and fabric braceless structure, similar to that of the Goat homebuilt glider, which can be analized as a truss...

Hi! I have a fundamental doubt regarding deflection on a 3D beam/wing. Given that Timoshenko only covers deflection for 2D structures. I am guessing that perhaps, you can calculate deflection in a 3D wing, as if it was a 2D structure. Once the values of EI are known for the beam/wing section...

Hi mfgenggear! It seems that you had an engineering career that many dream of! In my particular case, I really enjoy the freedom of experimenting on my own in the shop, but I also admire the craftmanship and quality of certified aircrafts. Cheers, Oriol

Hi mfgenggear! Thanks for the links! The internal structure of the Darkaero wing is very original. I just saw the video about it, the idea of cutting all the internal parts using a CNC machine seems wise. I have started building wood RC models to experiment. Wood is less messy than composites...

Hi rb1957! The person that has been guiding me, has told me what you said; that some engineers skip analizing the rotated rectangles, and only use A*y^2 of parallel axis theorem. By creating this spreadsheet I have learned to work with Excel. I learned to program during my studies, but I...

Thanks WKTaylor for the links! There were some of the documents on the list, that I did not knew about! Yes, wood is tricky. However you can run the calculations, with some estimative values gathered from ANC-18, or Frati's book etc. The most important thing to me, is to have a working method...

Hi rb1957! I am working on an example of a self designed wood glider wing, which has a D-tube plywood and two spars, the ribs are mostly covered by fabric, that is ineffective skin or non structural skin. So far, the reference books I have used are Stelio Frati's The Glider, and Timoshenko's...

Thanks SWComposites! I will finish Timoshenko's, and then start with one of the aero structures books you mention. Oriol

Thanks rb1957! To make things easier, I am considering a flat lift distribution, and a constant spar and wing section/rectangular planform. I have calculated the moment of inertia of the different parts that make up the wing section, and located the resulting airfoil centroid, but I do not know...

Hi! Albeit I studied aero engineering, I never finished my studies. I have been lately reading Timoshenko, to learn some beam theory basics. I can calculate deflection for a single beam, but I do not know how to calculate deflection for the whole wing? In fact, I can not even tell how to...