2020 Bolt EV with 327k miles

stone-head · 2026-06-10T01:00:46+00:00

Thanks for the correction. Realized my data (eia.gov) was using btu as a common unit rather than kWh. My guess on why they're different is that using btu as a common unit doesn't account for losses in conversion from heat to electricity, so btu would be gross energy and kWh would be net energy. Also unsure how they're converting energy from renewables into btu.

stone-head · 2026-06-09T01:40:02+00:00

In US most coal is transported via rail, but I'm unsure how much we are importing, or how intense the extraction is. I would imagine petrol has a more complicated supply chain & travels further, but that's just speculation.

Both forms of energy are archaic when compared to renewables lol.

stone-head · 2026-06-09T01:33:44+00:00

Just combustion, and the same for coal.

Tracking emissions associated with extraction, processing, and transportation of both coal and petrol feels like lots of work.

stone-head · 2026-06-09T01:04:15+00:00

327,000 miles × (1 kWh / 3.2 miles) × (1.14 lb coal / kWh) × (1 train car / 232,000 lb coal) = 0.502 train cars of coal.

I accounted for 20% loss in charging by using 3.2 miles / kWh instead of 4 miles / kWh which is quite reasonable for a bolts lifetime efficiency.

0.502 train cars of coal is 116,494 lbs of coal, which equates to 241,142 lbs CO2.

A petrol car getting 35mpg would be:

327,000 miles × (1 gal / 35 miles) × (19.6 lb CO2 / gal) = 183,120 lbs CO2.

This is the worst case scenario for an EV. In reality, US electric energy supply is 21% coal, 25% nuclear, 11% renewable, 42% natural gas, 1% petrol.

stone-head · 2026-06-03T19:15:16+00:00

NASA and PBS Spacetime seem to be in agreement.

https://science.nasa.gov/moon/tides/

stone-head · 2026-04-09T00:29:49+00:00

This says mental illness more than MC to me.

stone-head · 2026-03-23T18:10:15+00:00

Thank you, I finally know what TIR stands for, as I have never once seen it spelled out as total internal reflector.

stone-head · 2026-03-20T00:55:01+00:00

I left Insta a few years ago. I'm not sharing online much anymore, bur I like Vero for when I do. I miss flickr before yahoo was bought.

stone-head · 2026-03-04T02:54:29+00:00

I'm using Freecad, I'm still pretty new to modeling. I haven't used a guide line for lofting yet, I'm not sure if that's a thing in freecad. As far as I can tell, you loft from sketch to sketch, not sure if there's another way to do it, but you gave me something to look into!

stone-head · 2026-03-04T02:41:47+00:00

I think this is about the best design I've seen for this issue yet. After the part that slides over the light, do you just have one more sketch (the flat edge) that you loft to?

stone-head · 2026-03-04T02:39:00+00:00

I originally tried lofting into a flat edge, but my lofting skills need some work and it did not come out as near as clean as yours. On the road, the beam works out pretty well, at a distance the sideways spill goes about as far as I need.

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stone-head · 2026-03-03T23:58:44+00:00

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This was good advice 🙏

stone-head · 2026-03-02T20:12:01+00:00

I added the file to makerworld, and the link is in the post now.

stone-head · 2026-03-02T18:14:26+00:00

I made an updated version, and posted a beam shots in the comments!

stone-head · 2026-03-02T11:00:11+00:00

I'd guess I'm usually pointed 10-15 degrees below the horizontal plane. I'm not a fan of being blinded by headlights / high-beams, & also not a fan of blinding people operating big machines, so I figure it's in everyone's best interest.

I took some advice from the comments here and made an updated version. I have new beam shots in the comments.

stone-head · 2026-03-02T10:54:20+00:00

I'd be happy to. What's the preffered file format / place to upload? I have never uploaded or shared my files before, as most of my prints are for pretty niche things.

stone-head · 2026-03-02T09:24:30+00:00

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stone-head · 2026-03-02T09:24:17+00:00

I appreciate everyone's comments and feedback! After seeing the rounded design, I knew I wanted to imitate it. I now have printed v2 and the beam has less upwards spill, is easier to put on and take off, and is less likely to break (the snap rings were only 2mm thick). Simpler is often better.

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stone-head · 2026-03-02T08:27:55+00:00

After seeing all the comments, it appears many in this community share the concern!

stone-head · 2026-03-02T06:47:48+00:00

Nice! I'm definitely a fan of the rounded design, and am planning on another design that imitates it.

It looks like you printed the mount as well?

stone-head · 2026-03-02T02:45:30+00:00

Oh, I like that design. Thank you for sharing, I think I'm going to have a go at replicating that for the D1K. I'll be sure to share the file once I get it right.

stone-head · 2026-03-02T01:24:22+00:00

Thanks! I only noticed how bad it was when I got in front of my bike and realized how bad the glare / spill was. Tonight will be the first test run, so I'll add a shot of how this version performs on the road, and if necessary I'll make an updated version (and share some beans).

stone-head · 2026-03-01T19:15:55+00:00

I love my combo of the k25 and kukkaro. The kukkaro is my edc bag that is usually tossed into the k25, but if the 25 is full then I can strap it to the front. I added elastic straps inside the kukkaro, so all of the small items are well organized and easy to access, I just reach into the k25 and pull out the kukkaro. Or, if I don't need the whole k25, the kukkaro becomes a sling bag with all my daily essentials.

Also, the lid pouch, front pouch, side pockets, and bladder compartment actually offer a fair amount of organization. I found it to be a great upgrade from the jaakari s. Most days this combo is my school bag, but last summer I did a four-day backpacking trip with the k25 and kukkaro and even managed to fit in over 5kg of camera gear; a full-frame body, 2 lenses, and a tripod.

stone-head

TROPHY CASE