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#11
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Continental E-225-4 question
Most if not all Mogas today has Methanol in it as a replacement for
the oxygenation agent MTBE. Gas pumps are not typically labled as to alcohol content. Both Petersen and EAA autogas STC's are not valid with autofuels containing alcohol. At a recent IA seminar held by the FAA we were reminded that even with an autogas STC if an airplane is operated using a fuel containing any alcohol that the airplane would be considered by them to be "unairworthy". Unairworthy to the FAA also means uninsured to most aviation underwriters. So you won't have a problem until you have a problem! Methanol is hydroscopic which means it holds water. This water will, over time, rust the steel parts in the fuel system. Gary Plewa On May 31, 6:42 am, Ron Natalie wrote: Rip wrote: Jim, sadly there is no mogas STC for the Navion, with any engine. Rip Yep, I even talked to Petersen about this (the EAA doesn't touch 6 cyls). All they knew was they had tested it and it had failed the vapor lock test. They couldn't remember which engine, fuel system, or model Navion they had used. |
#12
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Continental E-225-4 question
Thanks - did you notice the thread titled Gasohol? That cites a document and
others have concurred that there are some states now where you can not buy Methanol free fuel. Back to the 100LL it seems...and think about all those mogas STCs that have just become invalid. -- Jim Carter Rogers, Arkansas "Gary" wrote in message oups.com... Most if not all Mogas today has Methanol in it as a replacement for the oxygenation agent MTBE. Gas pumps are not typically labled as to alcohol content. Both Petersen and EAA autogas STC's are not valid with autofuels containing alcohol. At a recent IA seminar held by the FAA we were reminded that even with an autogas STC if an airplane is operated using a fuel containing any alcohol that the airplane would be considered by them to be "unairworthy". Unairworthy to the FAA also means uninsured to most aviation underwriters. So you won't have a problem until you have a problem! Methanol is hydroscopic which means it holds water. This water will, over time, rust the steel parts in the fuel system. Gary Plewa On May 31, 6:42 am, Ron Natalie wrote: Rip wrote: Jim, sadly there is no mogas STC for the Navion, with any engine. Rip Yep, I even talked to Petersen about this (the EAA doesn't touch 6 cyls). All they knew was they had tested it and it had failed the vapor lock test. They couldn't remember which engine, fuel system, or model Navion they had used. |
#13
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Continental E-225-4 question
Gary wrote:
Most if not all Mogas today has Methanol in it as a replacement for the oxygenation agent MTBE. Gas pumps are not typically labled as to alcohol content. Both Petersen and EAA autogas STC's are not valid with autofuels containing alcohol. At a recent IA seminar held by the FAA we were reminded that even with an autogas STC if an airplane is operated using a fuel containing any alcohol that the airplane would be considered by them to be "unairworthy". Unairworthy to the FAA also means uninsured to most aviation underwriters. So you won't have a problem until you have a problem! Methanol is hydroscopic which means it holds water. This water will, over time, rust the steel parts in the fuel system. I do the water test on every every tank I put in the plane. So far here in central northern Oregon I can get alcohol-free gas. Don't know how long it will last, though. Also I will shortly be moving to Idaho and have no idea what is available there. So, sadly, I agree that the life of the mogas STC is limited. -- Frank Stutzman Bonanza N494B "Hula Girl" Hood River, OR (soon to be Boise, ID) |
#14
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Continental E-225-4 question
"Jim Carter" wrote in message ... TTE: 2135 SMOH: 1316 STOH: 16 I realize this is an OLD engine model that will probably have to be switched to an IO-470 or IO-520, but given these numbers and if it has had no really long periods of idle time, would you be worried beyond reasonable doubt about getting another 300 to 500 hours out of it? (also assuming compressions are still good). -- Jim Carter Rogers, Arkansas I have some Navion Time with that Engine not a bad engine just keep it cool and invest in Aeroshell stock! |
#15
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Continental E-225-4 question
On May 30, 11:51 pm, Frank Stutzman
wrote: Well, there is the Beech electric prop as well. However considering that pitch change bearings are non-existant, I doubt thats any better. On a Bonanza, the Beech prop with 88 inch blades is considered by many to give the best performance. Good point Frank, but since the original poster said 225-4 which is a wet-sump and the Bonanza uses the 225-8 dry sump version I didn't think to mention any Beech props. Actually I believe there is yet another with composite blades called the Koppers Aeromatic prop, very rare if any are still airworthy. 380CHT is typical for my Navion above 8000' altitude but I feel better when CHTs are below 350 and I need to fly in denser air to achieve that with the cowl flaps closed. Gary Plewa AP/IA N4GP |
#16
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Continental E-225-4 question
On May 30, 10:16 pm, Rip wrote:
I know Gary. I concur with all he says. Gary, will you be at the Navion National? Rip A&P/IA Yes, but only for a few days not the entire week. What about you? Gary |
#17
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Continental E-225-4 question
Gary wrote:
On May 30, 10:16 pm, Rip wrote: I know Gary. I concur with all he says. Gary, will you be at the Navion National? Rip A&P/IA Yes, but only for a few days not the entire week. What about you? Gary Hopefully all week! Rip |
#18
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Continental E-225-4 question
In article .com,
Gary wrote: Most if not all Mogas today has Methanol in it as a replacement for the oxygenation agent MTBE. Gas pumps are not typically labled as to alcohol content. Both Petersen and EAA autogas STC's are not valid with autofuels containing alcohol. At a recent IA seminar held by the FAA we were reminded that even with an autogas STC if an airplane is operated using a fuel containing any alcohol that the airplane would be considered by them to be "unairworthy". Unairworthy to the FAA also means uninsured to most aviation underwriters. So you won't have a problem until you have a problem! Methanol is hydroscopic which means it holds water. This water will, over time, rust the steel parts in the fuel system. Gary Plewa Gary, You are confusing methanol with ethanol. Neither is approved for aviation fuel usage. Both are hydroscopic -- methanol more than ethanol. Both have materials incompatibilities. Both increase fuel consumption and reduce power. Ethanol is the alcohol of choice (Per Archer-Daniels Midland) for gasohol. It is also the stuff you drink. Methanol will destroy your eyes. |
#19
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Continental E-225-4 question
Gary, You are confusing methanol with ethanol. Neither is approved for aviation fuel usage. Both are hydroscopic -- methanol more than ethanol. Both have materials incompatibilities. Both increase fuel consumption and reduce power. Ethanol is the alcohol of choice (Per Archer-Daniels Midland) for gasohol. It is also the stuff you drink. Methanol will destroy your eyes. Yup, you are absolutely right. After I hit the return key I realized my mistake. Grain alcohol (i.e. moonshine) is used in Gasoline, hence the increase in corn prices. Not denatured alcohol (e.g. Methanol). |
#20
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Continental E-225-4 question
Gary wrote:
Yup, you are absolutely right. After I hit the return key I realized my mistake. Grain alcohol (i.e. moonshine) is used in Gasoline, hence the increase in corn prices. Not denatured alcohol (e.g. Methanol). Methanol is not the same as denatured alcohol, either. Denatured alcohol is ethanol that has been intentionally contaminated with methanol. |
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