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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> RC Fuels >> E85
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E85 - 8/1/2005 12:45:34 PM   
coralcape


 

Posts: 142
Joined: 5/1/2004
From: cape caoral, FL, USA
Status: offline 		Have heard of E85 auto fuel sold in various states. Am curious as to the ratio of gas to ethanol. I just assumed it was 15% ethanol, but have seen other posting that say it's 15% gas. Anyone know for sure? Thanks , red
       Post #: 1

RE: E85 - 8/1/2005 5:32:30 PM   
downunder



Posts: 3015
Joined: 10/10/2002
From: Adelaide, AUSTRALIA
Status: offline 		Well I'll be darned...I would have sworn E85 meant 85% petrol but not according to this web site.
http://www.co.hennepin.mn.us/vgn/portal/internet/hcdetailmaster/0,2300,1273_1788_100326437,00.html

(in reply to coralcape)
       Post #: 2

RE: E85 - 8/3/2005 2:17:31 AM   
coralcape


 

Posts: 142
Joined: 5/1/2004
From: cape caoral, FL, USA
Status: offline 		Thanks for the reply. Did a Google and found lots of info. Certainly seems like a good idea. Iowa report , states we produce two billion gallons of it a year, and you can drink it ) Good luck, red

(in reply to downunder)
       Post #: 3

RE: E85 - 9/15/2005 10:33:39 PM   
canardlover



Posts: 251
Joined: 8/16/2002
From: Sodertalje, SWEDEN
Status: offline 		Indeed E85 is 85% ethanol and 15% gasoline and some guys here in Sweden run 2S glow engines on E85 with good results. I used it myself recently to run my Saito.72 with acceptable result provided that the on-board glow was lit all the time(no nitro off course) High speed needle was screwed in 1/4 of a turn and power seemed to be about the same as with methanol. Although it was a cool night I could not detect any tendency to overheating of the engine. Used 22% oil (11% ML70 + 11% castor) but still the engine smoked much less than with 18% oil in methanol.
According to experts here the E85 fuel must be handled with care since the vapours are very EXPLOSIVE, much more so than with pure gas where the head space vapour is saturated. Still an interesting alternative since E85 price is about half of methanol (Sweden)and with less consumption fuel cost will only be a fraction of that of methanol with nitro.... ... But please be careful out there... ....Cheers/Harald

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RE: E85 - 9/24/2005 6:43:13 AM   
smokingcrater


 

Posts: 2353
Joined: 9/20/2002
From: Up north, ND, USA
Status: offline 		e85 in my area is about $1.00 cheaper then regular old 87/89 octane gasoline, it would be great to burn it!

(in reply to canardlover)
       Post #: 5

RE: E85 - 2/14/2006 11:57:44 PM   
jeffk464


 

Posts: 1157
Joined: 10/31/2004
From: cerritos, CA, USA
Status: online 		Damn, you guy really beat me to this one. I just found out about this E85 stuff, and was excited about being the first person to suggest running it in a glow engine. We need to get some more reports on how this stuff runs in our engines.

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       Post #: 6

RE: E85 - 2/20/2006 10:39:03 PM   
HughCumbee


 

Posts: 10
Joined: 12/15/2003
From: Johns Island, SC, USA
Status: offline 		There was some website I went to last week that had the list of E85 compatible vehicles. There was currently only 10-15 cars,but they say more to come.

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       Post #: 7

RE: E85 - 2/21/2006 8:23:22 PM   
Sport_Pilot



Posts: 7277
Joined: 1/21/2002
From: Acworth, GA, USA
Status: offline 		E85 Ethanol 85% > Got it?

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RE: E85 - 2/21/2006 8:24:36 PM   
Sport_Pilot



Posts: 7277
Joined: 1/21/2002
From: Acworth, GA, USA
Status: offline
quote:

According to experts here the E85 fuel must be handled with care since the vapours are very EXPLOSIVE, much more so than with pure gas where the head space vapour is saturated.


Poppy Cock. It is less explosive than gasoline. Also less energy.

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       Post #: 9

RE: E85 - 2/22/2006 10:30:22 PM   
canardlover



Posts: 251
Joined: 8/16/2002
From: Sodertalje, SWEDEN
Status: offline 		Sport Pilot: whatever "Poppy Cock" means - fact is that E85 vapour is explosive at normal ambient temperatures which gas and diesel vapours are NOT...Regards/Harald

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RE: E85 - 2/23/2006 2:38:05 AM   
Jim Thomerson



Posts: 2724
Joined: 10/9/2002
From: Austin, TX, USA
Status: offline 		Ok we have two statements which are diametrically opposite. Can someone give some documentation to support either statement? Given the extensive experience with E85 in Sweden, and not knowing any better, we should pay attention. However, still need documentation. I have looked around some and not come up with anything.

(in reply to canardlover)
       Post #: 11

RE: E85 - 2/23/2006 8:58:57 AM   
downunder



Posts: 3015
Joined: 10/10/2002
From: Adelaide, AUSTRALIA
Status: offline 		OK, from a very quick google search..
Ethanol has a flash point of 17C (62.6F) with an autoignition point of 425C (797F).
Gasoline has a flash point of 45C (113F) and autoignition of 246C (475F).

Flash point just means that any vapours above the liquid will burn away (if ignited) but not cause a continuous fire.

(in reply to Jim Thomerson)
       Post #: 12

RE: E85 - 2/23/2006 7:17:48 PM   
Jim Thomerson



Posts: 2724
Joined: 10/9/2002
From: Austin, TX, USA
Status: offline 		Actual data! What does it all mean? I suppose that vapor from E85 would flash at a lower temperature than pure gasoline vapor and would heat the gasoline part of the vapor up to autoignition. So E85 vapor might in fact be prone to ignite at a lower temperature than pure gasoline vapor. Is there like a eutectic mixture of vapors, I wonder? I have no ego stake in this, so flame away.

(in reply to downunder)
       Post #: 13

RE: E85 - 2/23/2006 8:29:25 PM   
canardlover



Posts: 251
Joined: 8/16/2002
From: Sodertalje, SWEDEN
Status: offline 		Sure thing, here is one of my sources but unfortunately it is in swedish, I have not yet found this clearly explained in english. Sport Pilot (and downunder) are correct if you only talk about pure ethanol but apparently it is the E85 mixture which is problematic. So much so that a special "flame lock" should be installed in swedish fuel station equipments for pumping E85. This is to prevent a fire to travel down into the E85 cistern.
http://www.srv.se/templates/SRV_Page____14874.aspx
A warning is also given that an E85 fire is harder to quench than a "regular" gas... ...fire is but the exact reason is not given.
Hope this helps guys and BTW I have now milled the crankcases of one Saito.56(-1.0mm) and one Saito.72(-0.5mm) to make them more 0%nitro and/or E85 compatible. Aiming for a compression ratio of about 13/1...waddayathink downunder..??......Cheers/Harald

PS..found a reference in a swedish source to "SAE Technical Papers Series 950401" but I was not authorised to download it myself... ...maybe someone else out there can help...DS



< Message edited by canardlover -- 2/23/2006 9:00:52 PM >

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RE: E85 - 2/23/2006 9:00:52 PM   
mikefuture



Posts: 92
Joined: 1/8/2003
From: mineola, NY, USA
Status: offline 		The E85 cars can actually run on 100% Ethanol.
The reason they add 15% gasoline to it is for starting purposes. Pure Ethanol is hard to start in the cold weather. (You guys in Sweden should know this!).

In Venesualla, all of the cars run on 100% Ethanol. (It's hot down there!)



Ethanol is 100 octane but it is true it does have less energy, gal per gal ( or Liter per Liter ). so gas milage with E85 will be lower than pure gasoline. Depending upon where you are in the world, prices for E85 may be the same or a little lower than regular gas. However, you need to consider the reduced milage.
The advantage is that it reduces the amount of oil that is imported and supports local farmers.

I don't know why an E85 fire would be so different that gas. In fact, you can put out and alcohol fire out with plain water! It is much more safer that regular gas.


(in reply to canardlover)