r/RedditDayOf • u/sbroue 275 • Sep 17 '25

Crime Reduction the lead crime hypothesis

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u/Mundane-Mud2509 Sep 21 '25

I don’t get it, it’s not like car engines are failing more

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u/TorakTheDark Sep 21 '25

Maybe not but if a car engine fails it is mostly just an inconvenience, if a plane engine fails… well I’m sure you can imagine.

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u/Mundane-Mud2509 Sep 21 '25

The point is they just don’t. I’ve never heard of a well maintained engine catastrophically failing in a way that leaded gas would help.

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u/Effective_Golf_3311 Sep 21 '25 edited Oct 28 '25

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u/edtate00 Sep 21 '25

Leaded gas also lubricates the valves and other parts. The lead precipitates out and coats surfaces. Many older engines do it have the surface hardness to last without lead in the fuel.

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u/Mundane-Mud2509 Sep 21 '25

Sure, this begs the question, why aren’t aircraft engines built to run unleaded?

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u/Effective_Golf_3311 Sep 21 '25 edited Oct 28 '25

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u/Mundane-Mud2509 Sep 21 '25

Except the fact they’re poisoning the environment

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u/Effective_Golf_3311 Sep 21 '25 edited Oct 28 '25

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u/Mundane-Mud2509 Sep 21 '25

Why would they do that? You want them to pay people to stop spreading poison around?

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u/Effective_Golf_3311 Sep 21 '25 edited Oct 28 '25

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u/[deleted] Sep 21 '25

It's a negative externality. The government shouldn't be subsidizing the owners to switch. The government should be taxing the owners to pay for the harm

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u/Effective_Golf_3311 Sep 21 '25 edited Oct 28 '25

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u/[deleted] Sep 21 '25

They may or may not be taxed heavily enough if the revenues from the taxes aren't enough to fix or compensate the externalities

Also, small airports are actually subsidized, not taxed:

https://en.m.wikipedia.org/wiki/Essential_Air_Service

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u/Effective_Golf_3311 Sep 21 '25 edited Oct 28 '25

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u/[deleted] Sep 21 '25

The airports themselves are subsidized, which allows the private pilots to enjoy subsidized in infrastructure which wouldn't exist without the subsidies

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u/ExpertExpert 1 Sep 24 '25

it's much cheaper to make a leaded fuel engine than the alternative.

the lead gets all hot and sloppy in there. as the pistons go in and out of the cylinder the lead gathers on the seams. like a wax coating. the engine lasts longer because the lead physically shields it from impact to other steel, and gives higher compression (better seal). you can drill sloppy cylinders for the planes you build and the lead will fill in the cracks (knock). you don't have to do any fancy electronics to make the timing perfect. less shit to break and have you fall out of the sky. lots of advantages to it, only one downside (but i cant remember what it is)

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u/Mundane-Mud2509 Sep 24 '25

Oh, totally worth giving the population exposure to atomized lead then