vendredi 3 mars 2017

Calculating the dimensions of a teardrop shape

Okay all, here's a tough one (for me). I have a periscope that is a cylinder with an overall height of 1cm and a diameter of 4.4mm. Okay yeah, small. Stick with me. The top of the scope is beveled at 45deg about half-way across. The height of the bevel is 2.5mm.

I thought I could cap it by creating an oval about twice the diameter in length. But, no prototyping shows the cap to be more of a teardrop shape. My picture of the part might be hard to see so I sketched it out.

Is there a way to calculate the shape of the teardrop? I'd hate to do the trial-and-error or the trim-to-fit methods.

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