Leaded Avgas in Aviation
Discussions center on the continued use of leaded aviation gasoline (Avgas) in small piston-engine propeller planes, contrasting it with unleaded jet fuel, exploring reasons for persistence, alternatives, and environmental/health impacts.
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Found a decent article about this:https://www.thedrive.com/news/42218/if-leaded-fuel-is-so-bad...
On several levels. Avgas is still leaded.
I know nothing about this and was surprised to learn leaded fuel is still a thing in any gas. Found this: https://www.faa.gov/about/initiatives/avgas/Avgas is the only remaining lead-containing transportation fuel. Lead in avgas prevents damaging engine knock, or detonation, that can result in a sudden engine failure.If engine knock can knock y
Not all. Jet fuel doesn't have lead. AFAIK it's piston based small planes.
Why is lead a requirement for piston-engine aircraft? Land vehicles seem to be doing just fine without leaded fuel
There is still aviation fuel using lead.
Do planes like that still require leaded gasoline?
It's not just engine evolution, but TEL was replaced by non-lead additives, not removed. And the fuel mix impacts values critical for aviation but mostly irrelevant to cars, like fuel vaporisation for given temperature/pressure (this is AFAIK major issue with ethanol added to fuel and source of limits on use of MOGAS in aircraft) as well as impact in performance which are pretty much impossible to notice for a car (except maybe if you have engine with sparkplugs designed for leaded fue
Lead is still present in Avgas.
Jet fuel has never contained lead. Lead is still used in aviation gasoline, used by small propeller planes (larger propeller planes typically use turboprop engines that use jet fuel). But consumption of aviation gasoline is a very small fraction of the consumption of jet fuel.