Far be it from me to defend the imperial system- I love and daily work in metric, but you realize nearly all ancient measurement systems are created around commonplace physical measures (body parts, strides, etc.) and simple multiples thereof to make their use easy, yeah?
We've got a lot of tools at our disposal now to both standardize and make working with a decimal system a lot more doable than before.
Fidelity means not cheating, itdoesnt have anything to do with partner count, and is not synonymous with monogomay. You can be in a poly relationship, and practice fidelity by not cheating on your poly partners.
I'm also posting here, as I saw that my previous post was shared there.
Update: Following my test with a satellite dish, I'm planning to build a solar cooker using this diagram. The linear dish is 50cm wide and 1.40m long. For the reflectors, I plan to cut 50cm x 5cm mirrors. The dish isn't curved, but rather composed of 50cm facets (I haven't designed the transverse reinforcements or the mirrors).
I plan to build the structure from reclaimed chipboard, with a few pieces of 5 and 10mm plywood. For the complex parts, I cut them with my fablab's laser cutter and will use it as a template to remake them in thicker wood with a trimmer and a copy cutter.
I'll probably double the crosspiece at the top for added rigidity.
The upper parts with the holes are intended to hang a pot and eventually a hotplate. My goal is to see if I can make a solar griddle.
The labeling on those axes is horrific. A human is apparently about 7 units of "Large" on the "Size" axis, and can piss around 110 units of "Jet" on the "Shape" axis.
What is 7 units of Large Size you wonder? Fuck you. What is 110 units of Jet Shape you ask? Hell if we know. You sure aren't going to.
What are all the unlabeled dots? Who cares. Sample size? "I saw one do it."
Thank you!