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  #11  
Old 10-11-2018, 07:02 PM
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Sam Buchanan Sam Buchanan is offline
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Quote:
Originally Posted by Mel View Post
I think the debate here is between E-10 and E-15, not E-85.
You are correct, I typed E85 when I intended E15. Thank you for the correction, my post has been amended.

I think the main point of my post is still valid, E10 is not going away. The announcement was to permit E15 to be sold year-round instead of seasonally. Several trade groups are already gearing up to block the move to year-round E15.
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Last edited by Sam Buchanan : 10-11-2018 at 07:08 PM.
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  #12  
Old 10-11-2018, 07:45 PM
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pstraub pstraub is offline
 
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Quote:
Originally Posted by DaleB View Post
First of all, could we maybe, pretty please, have just one forum where we don't have a political spin on topics? It gets really, really tiresome.
Hallelujah to that!! Could we please refrain from the Trump (or Clinton) bashing on VAF. I have VERY STRONG opinions to one side, but I refuse to blatantly or covertly inject them into my VAF posts. I am assuming we are all fans of airplanes and Van's Aircraft here....why alienate half of your friends with a subtle (or not) political jab

[Agreed. The original post has been edited to remove the political comments.]
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Last edited by rv7boy : 10-15-2018 at 01:04 PM. Reason: Explanation of editing
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  #13  
Old 10-11-2018, 10:17 PM
RFSchaller RFSchaller is offline
 
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Amen! Public discourse has become too polarized.

Original post has been edited...one of the moderators.

Last edited by rv7boy : 10-15-2018 at 11:11 PM. Reason: Explanation of editing
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  #14  
Old 10-23-2018, 09:20 AM
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Piper J3 Piper J3 is offline
 
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As mentioned in first post, I sent an email to Rotax Technical Support.

Here is response...

Dear Sir

The fuel issue is not as simple as elected officials lead you to believe. Increasing the fuel from 10 to 15% would radically increase NO x emissions into the atmosphere. For that reason there will be no allowable increase in our recommendation based on testing of the fuels and emissions. If only 10% auto fuels are used this is manageable but at 15% there must be some consideration for carburetor fitted vehicles, both aircraft and automobiles, to do so without substantial emissions into the environment.

Best regards
Technical support
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RV-12 E-LSA #120058 AWC Jul 2012 - Bought Flying Oct 2015 with 48TT - Hobbs now 406

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  #15  
Old 10-23-2018, 10:06 AM
BMC_Dave BMC_Dave is offline
 
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Interesting.

E10 is only "up to 10%" ethanol and as I understand varies a bit but is usually somewhere between 6%-8%. E15 is "between 10.5% to 15%" according to the Alternative Fuels Data Center.

So you can jump from E10 to E15 with only a 0.5% increase in ethanol, presuming E10 is max and E15 min. And this supposedly would "radically increase... emissions into the atmosphere". That sounds.... unjustified.


https://www.afdc.energy.gov/fuels/ethanol_blends.html

When concentrations vary so much it's difficult to see how positive folks can be that "5%" would make that much of a difference.

Last edited by BMC_Dave : 10-23-2018 at 10:12 AM.
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  #16  
Old 10-23-2018, 11:19 AM
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DaleB DaleB is offline
 
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I found it interesting that the only issue mentioned in the email from Rotax support is emissions. I saw no mention of performance, reliability or other operational issues. I don't know what the limits are on nitrogen oxides from small piston aircraft, let alone experimental aircraft, but I suspect it's not a show-stopping issue for those of us in the US.

Of course there's always 100LL, which eliminates the ethanol issue altogether.
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