G100UL™ Avgas in the news
Ada company develops lead-free fuel to power general aviation industry
The Oklahoman. August 2016
A new fuel that might power the future of the world's general aviation industry filled a small jar in a hangar at Ada Municipal Airport, looking as if it could have been a mug of amber ale.
Tim Roehl, co-founder and president of General Aviation Modifications Inc. (GAMI) placed the jar of newly developed fuel on a table next to a jar of current aviation fuel. The current fuel was tinted blue to indicate it contains lead. The new fuel was developed solely by Ada's GAMI and is called G100UL for GAMI's 100 Motor Octane Unleaded. It is awaiting certification by the Federal Aviation Administration and is lead-free.
The general aviation world is the final transportation industry holdout still using leaded gasoline, called 100 Low-Lead, as its primary fuel for piston-engine aircraft.
However, the exemption for the use of a leaded fuel allowed by the Environmental Protection Agency (EPA) for general aviation aircraft is expiring. That deadline prompted an industrywide consortium to begin working on development of an alternative fuel about a decade ago.
“We became very frustrated with where we saw the industry going in terms of the inability to come up with a successful solution,” Roehl said. “So we began to try to formulate a successful replacement fuel on our own. And after only about six months, we seized upon a formulation and some chemistries that looked to us to be a viable replacement for the 100 Low Lead.”
STC in the works for G100UL
General Aviation News. September 2014
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."
The New Avgas
Aviation Pros. July 2014
GAMI’s fuel—G100UL™—can be produced at any petrochemical refinery without whole scale modifications. G100UL™ has already passed tests that mirror many of the most recent testing requirements of today’s 100LL fuel.
Milestones for GAMI include the completion of the FAA’s flight testing for certification of a fuel in an airframe with a recognized high performance engine, and the FAA’s acceptance of that flight test data.
Embry-Riddle: GAMI G100UL™ Tests Looks Promising
AVweb News. August 27, 2013
Anderson says the testing ERAU has done so far reveals no performance shortcomings in G100UL™ that would rule it out as a replacement fuel. Other than smell, Anderson said, there’s not much noticeable difference between G100UL™ and avgas.
“I know some people are saying there’s no drop-in replacement for 100LL, but this looks a hell of a lot like a drop-in replacement to me,” Anderson told AVweb....
Flying magazine. February 2011
Modifications must be implemented at the production plants, but George Braly, chief engineer at GAMI, said the fuel can be made with components “that are found inside the fence of any refinery.” Braly predicted a price of $5 to $6 a gallon for G100UL™, the company’s replacement fuel. Braly added, G100UL™ can be made at any of the seven or eight refineries around the country that produce 100LL avgas....”
G100UL™ Avgas Nearly Ready to Power GA
Cessna Owner. August 2010
Transitioning to a new aviation fuel has problems associated with it. Infrastructure, distribution, contamination with other fuels, and the costs of the additive packages and handling are considerations. GAMI’s fuel is considered transparent. GAMI has proven that, even when contaminated (mixed) with 100UL, the fuel maintains its octane rating. Without the need for lead, G100UL™ can be blended much more efficiently....
Future Fuel for High Perfomance Piston Aircraft
MMOPA. Fall 2010
We have now been operating our high compression (8.5:1; by comparison the Malibu is 7.5:1 and Mirage is 7.3:1) turbo normalized engines on the G100UL™ fuel since last January. Because of the higher compression ratio, this engine, when operated at the same horsepower, is somewhat more critical than either the Malibu or the Mirage engine. We have run this engine to more than 370 BHP and demonstrated compliance with FAA detonation requirements on the G100UL™ fuel. Thus this fuel will operate transparently on the MMOPA fleet of piston engine aircraft, as compared to 100LL....
Fuller talks engine technology, avgas outlook with TCM head
AOPA. August 19, 2010
With the prospect of a transition to an unleaded avgas on the horizon, many prospective aircraft buyers are taking a renewed interest in what’s under the cowling. AOPA President Craig Fuller met with officials at Teledyne Continental Motors in Mobile, Ala., Aug. 18 to get a firsthand look at the engines and discuss how the manufacturer is planning for an unleaded future....
Jack Pelton looks at GAMI's G100UL™ Avgas
Cessnan. August 11, 2010
G100UL™ looks to be a fuel that can be refined and distributed within the existing infrastructure we have here in the states. I would guess it could be produced in many other international locations also.
I know the devil is in the details. But this project is very interesting and very exciting. George Braly, GAMI’s chief engineer, heard what the EPA said about 100LL and is trying to do something about it for our industry....
Industry Leaders: Don't Panic On Avgas
AVweb. July 27, 2010
Although members of the industry's future fuel committee continue to insist that octane is only one consideration in the development of a new fuel, owners and operators show signs of believing it's the most important consideration. Curt Sanford, a member of the Cirrus Owners and Pilots Association, bluntly told the panel that 94-octane is simply too low and the fact that it has even been under consideration has created "a lot of anxiety" in the market. More push came from Jon Sisk, a member of the Clean 100-Octane Coalition, a recently formed group that's buttonholing the alphabets and FAA to at least agree that 100-octane or the equivalent performance ought to at least be the stated goal....
Showing off G100UL™ Avgas
July 22, 2010
G100UL™, is being developed by Ada-based General Aviation Modifications, Inc. (GAMI), which recently hosted AOPA President Craig Fuller, as well as Cessna President Jack Pelton. Other heavy-hitters in the GA industry have also been invited to take an up-close look at the new fuel, while GAMI officials expect a “deluge” of inquiries about G100UL™ during AirVenture in Oshkosh, which starts next week....
G100UL™ Avgas: The future of fuels
February 28, 2010
Once approved, G100UL will be a drop-in replacement for 100LL. It can be mixed in any percentage with 100LL, so if a pilot wants to top off a fuel tank that already has 100LL with G100UL, there will be no problem. “The fuel in the plane will still retain its spec and integrity and there will be no degradation in performance,” Roehl said.
Because it is a drop-in replacement, a separate distribution network won’t have to be created as it would with a biofuel and FBOs won’t need to add another fuel tank. “We know that FBOs operate on a shoestring,” he said, “so we don’t see them investing in a second tank.”
GAMI continues testing of the fuel in its test cell, as well as in the company’s SR22, while continuing to pursue the STC....