Elliptic integrals

It's about time to reconsider the whole Swagelok fittings and setup for the vacuum pumpline. Doing the math for the conductance (of the pipelines) is actually very fun. There's a "tee-cross" junction of two intersecting pipes for the thermocouple gauge, vent, pump and chamber - what's the internal surface area? The tee-cross is effectively a Steinmetz solid. The most elegant way, IMO, is to use elliptic integrals.

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I've been trying to set a course record between my home and the zebra crossings in front of the food center at the lagoon and back. I completed the first attempt in 18:49. The second in 16:50. I figured out the lines for most of the route, just that I have to wait till early morning to make the fastest attempt. Too dark and I can't go close to the perfect line. Too bright and there's probably too much traffic, which is worse, actually.

Edit: Set a new time, 14:59. It's starting to taper, I guess.