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Alex Venz

@ptpetra

Photographer, promoter of EVs, computer modder, cooling guru, product designer, tester, and all-around geek. He/him

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19.11.2023
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Latest posts by Alex Venz @ptpetra

Most of them look like Dremel rotary tool bits

07.03.2026 16:29 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

The real money for the prime contractors is in development programs, not munitions production. Hot wars cost too much & divert development budgets to operations.

From a financial standpoint, cold wars are a lot better for them.

07.03.2026 03:22 πŸ‘ 5 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

So that we can then join the EU, too… right?

06.03.2026 17:44 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

My high school had a cellphone ban more than 20 years ago and it wasn’t a problem because, like many impractical rules, we ignored it. They’d be confiscated if taken out during class… so don’t do that. πŸ€·β€β™‚οΈ

06.02.2026 15:21 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Wait, *that’s* what happened to the Babbage engine?! Oh, ffs…

06.02.2026 15:10 πŸ‘ 3 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

In my experience, diskette was mostly used when floppy diskettes and larger floppy disks were both present as a means for specifying which you were referring to. Otherwise, it was all just shortened to floppy.

11.01.2026 17:17 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Yeah, pretty much… Though, in this context, I’d argue Morro Bay still counts as the pacific

27.12.2025 00:53 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

β€œShipping velocity matters more than perfection.”

I’m gonna have to pass that along to folks I know writing safety critical embedded software… as if they aren’t already horrified enough by AI code generation.

26.12.2025 17:17 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Preview
One of the biggest microplastic pollution sources isn’t straws or grocery bags – it’s yourΒ tires Every few years, the tires on your car wear thin and need to be replaced. But where does that lost tire material go? The answer, unfortunately, is often waterways, where the tiny microplastic particle...

I see there’s a post about microplastics going around with a photo of drinking straws, so here is my semi-regular reminder that the 3 biggest sources of microplastics are tires (45%), synthetic clothing particles (35%) and paint (~10%).
Lay article attached:

24.12.2025 04:48 πŸ‘ 2478 πŸ” 1148 πŸ’¬ 24 πŸ“Œ 24

Amazing is certainly one way to describe it…

21.12.2025 05:07 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

But rental fleet operators need cars to inflict upon people…

18.12.2025 14:20 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Wow, I didn’t expect that outcome

15.12.2025 15:21 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

The udcap gloves seem like an interesting option for VRChat use (less so for gaming, due to the button/control setup). How have they been compared to the Diver-X?

15.12.2025 14:45 πŸ‘ 1 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0

With what I’ve witnessed, I’d be deeply impressed to see a construction contractor wearing appropriate PPE.

Pretty sure my drywall hanger would have just died had I not shut off his generator (running indoors) and brought him an extension cord.

08.12.2025 05:37 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

In a sane world, Zuck wouldn’t hold >60% of the voting shares.

05.12.2025 17:37 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Yeah, the realization I couldn’t actually buy the good powders that are used to make most brands’ pods was pretty disappointing.

23.11.2025 01:42 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

That approach can work if the design & engineering decisions that went into the specifics are well understood (I.e. the institutional knowledge is intact). We’d have to completely reverse engineer Saturn V first to have any hope of knowing how/what can be changed w/o compromising the rocket

21.11.2025 15:46 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

At this point, that would involve designing an entirely new rocket. The institutional knowledge for Saturn V is gone and technology today is considerably different. Plus, modern spaceflight has much lower tolerance for risk than in the Apollo era.

21.11.2025 15:32 πŸ‘ 4 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0
Thin, arrow-like aircraft flying overhead during takeoff.

Thin, arrow-like aircraft flying overhead during takeoff.

Managed to get a kinda ok photo of X-59’s first flight this morning. Given the circumstances, I shouldn’t have hoped for much more.

29.10.2025 01:33 πŸ‘ 16 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

Purchasing differences, if they exist, could be due to demographic misalignment between the store and EV early-ish adopters.

25.10.2025 17:10 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

A lone voice speaking truth may be drowned by a cacophonous enemy. But when true warriors stand together, add their voices to a chorus, the words gain the power to sweep away any perfidious clamor. Today of all days, add your voice, warriors, and sing for what's right.

18.10.2025 18:34 πŸ‘ 279 πŸ” 79 πŸ’¬ 7 πŸ“Œ 2

There were a lot of people out at 40E

16.10.2025 18:57 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Today’s test flight has been scrubbed.

16.10.2025 18:03 πŸ‘ 1 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0
Photo of an airfield behind a gate

Photo of an airfield behind a gate

Pretty cold out here at the plant. Word circulating is delay due to technical issues. Maybe another couple hours or so.

16.10.2025 14:40 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 1

I can see the appeal of AR in that it eases the cybersickness problem, but at the cost of more restrictive/worse experiences in a lot of cases.

Flailing to recover R&D money at the realization of how small the market is for the current state of tech?

08.10.2025 17:27 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Honestly, VR is pretty awesome but is still cost prohibitive to do well & something like 80% of people experience cybersickness when you strap them into an HMD. Motion sickness adaption is a slow, uncomfortable process most aren’t willing to go through just to use VR.

08.10.2025 17:24 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

This seems utterly ridiculous, but I don’t care: I’m in.

26.09.2025 22:44 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Antelope valley (high desert, east of Los Angeles)

21.09.2025 14:06 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

First heat pump water heater was faulty, but Rheem support was cool & sent me the field repair manual so I could fix it myself (no techs in the area in 2019). They sent the parts I requested & it has been great ever since.

20.09.2025 14:31 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Built my guest house entirely electric (no gas line) & the main house is almost there (just the dryer & cooktop left). I had similar issues with plumbers & heat pump water heaters. Got them to quote it as a normal install if I took responsibility for everything beyond water hookups.

20.09.2025 14:27 πŸ‘ 0 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0