100LL100 octane Low Lead (Common Aviation Gasoline)
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Meeting the needs of all operators and aircraft comprising the in-service fleet is a huge component of this challenge, if for no other reason than economics: Some 30 percent of the aircraft, which typically are powered by engines with characteristics most likely to need high octane fuel burn approximately 70 percent of the 100LL.
"They engaged Lycoming to test their fuel on our highest octane demand engine and we can confirm that it's remarkably close to Avgas 100LL from a performance perspective.
There's really no other chemical that precludes detonation like lead does," says Peter White, head of the new Fuels Program Office in the Federal Aviation Administration (FAA), which the agency established in fall 2012 to identify an unleaded alternative to 100LL.
100LL (100-octane, Low Lead) aviation gas is the most popular fuel for light aircraft and the greatest remaining source of lead air pollution in the U.S.
This research, combined with the EAA's Wisconsin flight tests, will be useful in the development of an unleaded high-octane gasoline to replace the current highly leaded 100LL aviation gasoline.
The current widely available aviation gasoline (avgas) is 100LL, a 100-octane fuel containing relatively low amounts of tetraethyl lead, which is toxic to humans.
The long, torturous road to replace 100LL with an unleaded alternative just got longer and more torturous as the FAA temporarily halted testing on the two leading candidate fuels in May.
The company's focus now includes advancing efforts to finalize the FAA's certification of high octane unleaded avgas by the FAA's Piston Aviation Fuel Initiative (PAFI) for use in airplanes currently fueled by 100LL.
The ongoing search for a drop-in replacement for 100LL aviation fuel took another step forward in September, when the FAA said it had chosen four unleaded formulas to undergo testing--two formulas from Swift Fuels, one from Shell, and one from Total.
New York (AirGuide - Airline & Travel News) Thu, Feb 27, 2014 - Congressional appropriations committees are looking to increase funding for research that seeks to find alternative to 100LL fuel, according to the General Aviation Manufacturers Association.
For a long time, the aviation community has advocated for keeping 100LL, but in recent years, the industry has made progress with the search to find a replacement.