Phase 1 testing begins on unleaded avgas

Phase 1 testing of four possible replacements for 100LL begins this month at the FAA’s William J. Hughes Technical Center in Atlantic City.

The four unleaded fuels — one from Shell, one from TOTAL, and two from Swift Fuels — will undergo laboratory and rig testing to analyze a number of factors, including materials compatibility issues with aircraft components, such as fuel bladders, fuel gauges, pumps and more.

[Read more…]

Shell Aviation: A decade of research continues

Last December, Shell Aviation revealed that it was the first major oil company to develop a lead-free replacement for 100LL.

The lead-free formulation is the result of 10 years of “exhaustive R&D,” according to company officials.

While some worry that large companies will forsake GA as it is such as small segment of the fuels market, Shell officials say that’s not true for them.

[Read more…]

Search for 100LL replacement raises many questions

When I started to write this post on unleaded avgas, I sat down to read about the upcoming evaluation program for four candidate fuels. The more I read the more questions it raised.

For instance, why does Swift Fuels have two candidates?

But the biggest question concerned the percentage of the piston aviation fleet that the new candidate fuels will satisfy. A few questions arise, like which engines are the most critical, under what conditions will they knock, which airframe, propeller, operating conditions are most critical, and on and on.

[Read more…]

The future of fuels

Fuel is the lifeblood of aircraft and pilots. Most aircraft need it to power their engines; pilots need it, in the form of oxygen and proper nutrition, to power themselves. The November issues of General Aviation News will turn the spotlight on fuels — all kinds — and look at the current state of affairs, as well as what we can expect

As always, we’d love to hear from our readers. Email General Aviation News Editor Janice Wood with your feedback.

Questions abound on FAA’s news about alternative fuels

gas-pump

Was it only me, or did anyone else find the press release by the FAA announcing that it has selected four fuels for further testing to replace 100LL this fall to be a bit peculiar?  In case you you missed it, the official press release from the FAA is here. Articles also appeared on this site, General Aviation News, and from the EAA.

None of the articles answered any of the obvious questions that came immediately to my mind, for instance:

[Read more…]

STC in the works for G100UL

gas-pump

While the government begins its testing of four potential 100LL replacements, George Braly and Tim Roehl of General Aviation Modifications Inc. in Oklahoma just finished up yet another test of their unleaded 100-octane avgas — G100UL — at Embry-Riddle Aeronautical University.

The fuel underwent flight testing and engine block testing in one of the school’s carbureted 172s.

“No issues were found,” Roehl reports. “We just lack a couple of other tests to complete our first STC on the 172.”

[Read more…]

Study seeks to answer why MoGas isn’t more available

gas-pump

Brian Boeshart is completing his Masters of Aeronautical Sciences (MAS) degree from Embry-Riddle Aeronautical University. Brian’s “Graduate capstone research project,” seeks to “determine why MoGas is not being offered at a majority of airfields across the United States.” If you are, “an FBO manager, or a pilot who is over the age of 18 and lives in the United States or US Territory,” you are eligible to complete this survey. Care to weigh in?