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Fergus Kyle
Joined: 03 Jun 2007
Posts: 291
Location: Burlington ON Canada
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 Posted: Fri Dec 11, 2009 2:11 pm Post subject: Ethanol 10% |
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Cheers,
Following the scuttlebutt on the above topic leads me to ask what the relative number of dissolving of fuel tank s might be. Being a very sloooow builder, I have to admit to a tank which goes back to 1998 and may be a victim of such an effect.
If you have knowledge of any attack on the Olde tanks, I would much appreciate it.
Happy landings
Ferg
Classic 914, CS prop. Wiring wiring
[quote][b]
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craigb(at)onthenet.com.au
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| Posted: Fri Dec 11, 2009 6:02 pm Post subject: Ethanol 10% |
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Cant comment on the ethanol attacking the tank, but ethanol will absorb a virtually unlimited amount of water from the air over time.
once it reaches 1% saturation with water it will fall out of suspension with the petrol forming 2 distinct layers, petrol on the top
as normal with water in the tank, which is why in most countries mogas WITH ethanol is prohibited in aircraft. If you want to try it
and see for yourself put mogas with ethanol in a jar and add a couple of drops of water and shake it up, leave it stand and it should
form two layers. Not many engines like running on 100% ethanol which is what will happen if the two fuels separate in the tank.
[quote] --
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rampil
Joined: 04 May 2007
Posts: 870
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| Posted: Sat Dec 12, 2009 9:44 am Post subject: Re: Ethanol 10% |
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On the other hand, there are many Rotax engines flying fine every day
with E10. Rotax itself has said it is OK for the 900 series engines.
For the standard Europa-supplied tank, E10 has no obvious effect, not
in my A224 which has been flying more than 5 years with nearly
exclusively E10. At my fifth annual inspection, per recommendations,
I replaced all of my fuel hose. There was no sign of interior
degradation, but I replaced the Gates R5 hose with R7.
If I had been particularly concerned I would have selected Aeroquip
666 teflon/carbon hose which has an infinite service life. It would
have required however replacing all the fuel fittings from barbs to
AN fittings from the tank to the engine.
If E10 is the only mogas you can obtain, it is still better for the
engine than leaded AVGas
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