Today's Message Index:
----------------------
1. 05:48 AM - Re: Fuel tank progress/welding..... (womenfly2)
2. 08:16 PM - Re: Re: Ethanol (macz@peak.org)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Fuel tank progress/welding..... |
Did you use 5000 series aluminum or 6000 series for the tank? Filler rod 4043 or
5365 for the welds seams?
Just curious,
WF2
--------
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=447081#447081
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
Oscar--
I had heard that ethanol only degraded fuel mileage (the only thing I am re
ally interested in for my pickup) a relatively small amount--but someone in
my Model A club said it was a bigger deal than I thought. So I ran a test-
-a thousand miles each with E10 gas vs non-ethanol high test gas. And I got
26% BETTER mileage with the non-alcohol gas. So now whenever I can get non
-alcohol gas for less than about a 25% price premium, I get that.
Cheers, Mac in Newport
From: "John Cox" <rv10pro@gmail.com>
Sent: Saturday, September 12, 2015 8:30:13 PM
Subject: Re: Pietenpol-List: Re: Ethanol
Great Read.
John Cox
Aurora, OR
On Sep 12, 2015 11:10, "taildrags" < taildrags@hotmail.com > wrote:
Douwe; while I don't claim to be "in the know", as a fire protection engine
er I do have some knowledge of fuels and I can read a table of physical pro
perties of fuels. Strictly from the "fuel as energy" standpoint, ethanol ha
s an energy content of about 11,590 Btu per lb and gasoline (including 100L
L avgas) has an energy content of about 18,700 Btu per lb. This means when
you're burning a blend of gasoline and ethanol, you're leaving some power o
n the table. Here in Oregon, regulations mandate the sale of "E10" in some
areas of the state and at certain times of the year. This is a blend of 90%
gasoline and 10% ethanol and it results in a fuel with somewhere between 3
% and 4% less energy than straight gas. To put it in practical terms, but g
reatly oversimplifying, your engine that produces 100HP running on avgas wi
ll only produce 96-97HP on E10 mogas. Granted, the E10 will cost quite a bi
t less and that's the attraction of it. As you've read from other posts her
e, ther!
e are downsides and one of them is the fact that ethanol is incompatible wi
th a lot of materials.
Another downside is the potential for vapor lock. Ethanol has a lower boili
ng point than straight gasoline, so it is less tolerant of high temperature
s under the cowling and it can vaporize in the fuel lines or anywhere it's
close to a hot surface. A vapor pocket or bubble in the fuel system can sto
p the flow of fuel... "vapor lock". The problem is increased in the summer,
of course, because when we land with a nice warmed-up engine and taxi over
to the fuel pump and shut down, the areas inside the cowling become heat-s
oaked and since there is no flow of cooler fuel in the lines when the engin
e is shut down, the fuel can vaporize and lock the system, making startup m
ore difficult.
The reason why you don't see cars sitting all over the shoulders of the roa
d with vapor lock is because most vehicles now are fuel injected or they ha
ve fuel pumps that deliver the fuel under pressure, not gravity, and the bo
iling point of a liquid increases as the pressure increases. You know this
from your camping experiences when you try to boil water while camping up i
n the mountains. It boils at a lower temperature up where the atmospheric p
ressure is lower, and your beans never cook! Of course this same effect mea
ns that flying at higher altitudes lowers the boiling point of fuel that co
ntains ethanol, but most Piets fly down pretty low where that isn't a big f
actor. More than you wanted to know, I'm sure ;o)
--------
Oscar Zuniga
Medford, OR
Air Camper NX41CC "Scout"
A75 power
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=447027#447027
===========
br> enpol-List" rel="noreferrer" target="_blank">http://www.matronics.c
om/Navigator?Pietenpol-List
===========
FORUMS -
eferrer" target="_blank">http://forums.matronics.com
===========
b Site -
-Matt Dralle, List Admin.
rel="noreferrer" target="_blank">http://www.matronics.com/contribution
===========
===
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|