Modeling Aircraft Aerodynamics in OPENVSP / VSPAERO!
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- Опубликовано: 3 окт 2024
- In this video I introduce how to model vehicle aerodynamics using the VLM method in VSPAERO. This is quick introduction video meant to gauge interest. So please like, subscribe, comment if you'd like to see more content!
Thank you ! Very clear and simple for a first approach on a model !
Awesome video, very informative and clear! Thanks! .. I have a question though, you mentioned when commenting on the Cm vs AoA curve that having a slightly -ve Cm value at zero AOA is favorable for a well designed stable aircraft, I'm wondering, why would that be the case ? .. I usually design my A/C to trim at a slightly +ve AOA, so a slightly +ve Cm. So I'd like to know your insight on that, why the -ve Cm ? ... Thank You
Hmm... In retrospect, I dont know why I said that. Maybe I was tired. . . Either way, you are correct! Thanks for calling it out. I have edited the video to remove that statement. Ideally, the Cm is zero but it's impossible to achieve this at every possible trim condition without incurring tail trim drag penalties. So you usually you design your vehicle for design point with as little trim drag as possible; e.g. Cm=0.
Thank you so much and can you recommend a good software for stability analysis ?
Please make more videos like this, our university club is joining SAE aero, and we plan to build a model using this and xflr 5.
By adding the additional drag by hand, are you not loosing the moment this drag generates on the aircraft?
You do! Although you could account for the moments by calculating the radial distance of the extra drag sources. . . But typically at the conceptual design level we aren't concerned with that. The idea with a model of this fidelity is to use it for trade studies. To get more accuracy and capture the additional moments you might consider going to full CFD.