For Nasa's public interactive applets/simulation sites

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https://www1.grc.nasa.gov/beginners-guide-to-aeronautics/bga-simulations/

https://www1.grc.nasa.gov/beginners-guide-to-aeronautics/bga-simulations/

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For Ripple simulations

https://www.falstad.com/ripple/

https://www.falstad.com/ripple/
Thanks to Sylph for this.

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For useful information of stealth

https://understandingairplanes.com/Stealth-Airplane-Design.pdf

https://understandingairplanes.com/Stealth-Airplane-Design.pdf

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For mathematical understanding of VTOL mechanics.

https://www.mdpi.com/2504-446X/7/5/330

https://www.mdpi.com/2504-446X/7/5/330

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All of these are https and proven to be excellent to learn something new. They are all in hyperlinks, but there's plain text in the quote blocks for anyone who wants to be careful!