Lead free by 2018?

[Frank Whiteley]

http://www.faa.gov/about/initiatives/avgas/

[Evan Ludeman[_4_]]

On Jun 29, 11:30*pm, Frank Whiteley > wrote:
> http://www.faa.gov/about/initiatives/avgas/


Glad the gov is on the job on this one /sarc.

[Jim[_18_]]

> Glad the gov is on the job on this one /sarc.


It’s only a problem for the high compression engines. Lycoming approved 93 octane unleaded auto fuel for the 0-360 a few years ago>

http://www.avweb.com/avwebflash/news/LycomingAnnounces_AutoGasApprovalProgram_198039-1.html

Jim D

[Evan Ludeman[_4_]]

On Jul 2, 1:19*am, Jim > wrote:
> > Glad the gov is on the job on this one /sarc.
>
> It’s only a problem for the high compression engines. Lycoming approved 93 octane unleaded auto fuel for the 0-360 a few years ago>
>
> http://www.avweb.com/avwebflash/news/LycomingAnnounces_AutoGasApprova...
>
> Jim D

Right. But this isn't a *technical* problem, is it.

[Bill D]

On Jul 2, 6:31*am, Evan Ludeman > wrote:
> On Jul 2, 1:19*am, Jim > wrote:
>
> > > Glad the gov is on the job on this one /sarc.
>
> > It’s only a problem for the high compression engines. Lycoming approved 93 octane unleaded auto fuel for the 0-360 a few years ago>
>
> >http://www.avweb.com/avwebflash/news/LycomingAnnounces_AutoGasApprova...
>
> > Jim D
>
> Right. *But this isn't a *technical* problem, is it.

Actually, it's a very technical problem - something government
committees aren't good at dealing with. 'Octane' is just one of a
large number of variables which effect how spark ignition fuels
perform. Serious AVGAS research ended as the jet age began and a lot
of scientific data seems to have been lost in last half century.

It's worth keeping in mind that present day engines were designed for
100LL - not the other way around. Since engine design was driven by
fuel availability, it's unlikely "drop-in" fuels will perform as well
as 100LL in engines not designed to use them. It may even turn out
new engines are required. In that case, IMHO, lightweight diesels
burning Jet A would be a better choice. Jet A is likely to be around
a long time.

[Evan Ludeman[_4_]]

On Jul 2, 10:25*am, Bill D > wrote:

> Actually, it's a very technical problem

The *availability* of ethanol free auto gas -- which a great many
airplanes can use, right now -- is anything but a technical problem.

[Frank Whiteley]

On Monday, July 2, 2012 12:37:42 PM UTC-6, Evan Ludeman wrote:
> On Jul 2, 10:25*am, Bill D > wrote:
>
> > Actually, it's a very technical problem
>
> The *availability* of ethanol free auto gas -- which a great many
> airplanes can use, right now -- is anything but a technical problem.

Perhaps something's nearly in the pipeline;^)

http://www.generalaviationnews.com/2010/08/19/100sf-undergoes-faa-testing/

http://www.tc.faa.gov/its/worldpac/techrpt/ar1013.pdf

http://www.aero-news.net/index.cfm?do=main.textpost&id=fc172ed9-5892-4860-944b-76561ad08d1f

Still sounds a bit speculative though.

Frank Whiteley