You can get an excellent fuel tester from Aircraft
Spruce that does all the measurements for you.
See http://www.aircraftspruce.com/catalog/appages/gasoholTester.php
Bob Rogers
-----Original
Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf
Of Jeff Whaley
Sent: Monday, March 09, 2009 12:34 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: 87 OCTANE MOGAS TEST (SOREL-TRACY, PROVINCE DE QUÉBEC, CANADA)
Hey
Bob, you're right ... 15ml was extracted from 200ml of gas ... 15/200 = 7.5%
Jeff
-----Original
Message-----
From:
Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Bob
White
Sent:
Monday, March 09, 2009 1:24 PM
To:
Rotary motors in aircraft
Subject:
[FlyRotary] Re: 87 OCTANE MOGAS TEST (SOREL-TRACY, PROVINCE DE QUÉBEC, CANADA)
Hi
Jeff,
Sorry,
I have to disagree. The water value is
arbitrary. 25 ml was
used
to start, but it could have been any amount.
The water wasn't in
the
fuel to start with, it's only used to suck the alcohol out of the
gas.
You need to look at how much fuel was added and how much alcohol
you
got out of it.
Bob
W.
On
Mon, 9 Mar 2009 10:08:50 -0700
Jeff
Whaley <jwhaley@datacast.com> wrote:
>
Hi Bob, the answer is the same 6.66% ...
>
The initial volumes were 200ml fuel and 25ml water for 225ml total.
>
The total volume never changed but the water content increased from 25 to 40ml
or by 15ml.
>
Therefore the alcohol content is 15ml/225ml or 6.66% of total volume.
>
Jeff
>
>
-----Original Message-----
>
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf
Of Bob White
>
Sent: Monday, March 09, 2009 12:57 PM
>
To: Rotary motors in aircraft
>
Subject: [FlyRotary] Re: 87 OCTANE MOGAS TEST (SOREL-TRACY, PROVINCE DE QUÉBEC, CANADA)
>
>
Hi Jeff,
>
>
I agree with your math, but what is the question? The 15 ml represents
>
a 6.6% increase in water + alcohol, but so what. If you started with
>
50 ml of water, you would still get 15 ml of alcohol out of 200 ml
>
fuel, so the increase would be 15 ml / 250 ml = 6%, or use 100 ml of
>
water ant you get 15 ml / 300 ml = 5%.
>
>
Isn't the question - what is the percentage of alcohol in the fuel?
>
>
Bob W.
>
>
>
On Mon, 9 Mar 2009 09:38:06 -0700
>
Jeff Whaley <jwhaley@datacast.com> wrote:
>
>
> Sorry double typos ... just got back from vacation ...
>
> The relationships are:
>
> 25/225 = 11.11%
>
> 40/225 = 17.77%
>
> Increase = 17.77 - 11.11 = 6.66%
>
> Same as 15/225 = 6.66%
>
> Jeff
>
>
>
> -----Original Message-----
>
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Jeff Whaley
>
> Sent: Monday, March 09, 2009 12:35 PM
>
> To: Rotary motors in aircraft
>
> Subject: [FlyRotary] Re: 87 OCTANE MOGAS TEST (SOREL-TRACY, PROVINCE DE QUÉBEC, CANADA)
>
>
>
> The relationships are:
>
> 25/255 = 11.11%
>
> 40/225 = 17.77%
>
> Increase = 17.77 - 11.11 = 6.66%
>
> Same as 15/255 = 6.66%
>
> Jeff
>
>
>
> -----Original Message-----
>
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Bob White
>
> Sent: Monday, March 09, 2009 12:06 PM
>
> To: Rotary motors in aircraft
>
> Subject: [FlyRotary] Re: 87 OCTANE MOGAS TEST (SOREL-TRACY, PROVINCE DE QUÉBEC, CANADA)
>
>
>
> Hi Yvon,
>
>
>
> My interpretation would be the 25 to 40 ml increase represents 15 ml of
>
> alcohol. That would represent
>
> 15 ml alcohol / 200 ml fuel + alcohol = 7.5 %
>
>
>
> I've never actually done one of these tests, so if I've got it wrong
>
> let me know. :)
>
>
>
> Bob W.
>
>
>
>
>
> On Mon, 09 Mar 2009 10:58:42 -0400
>
> Yvon Cournoyer <geryvon@videotron.ca> wrote:
>
>
>
> >
>
> > Yesterday I went to the Sorel airport and tested
the fuel in my
>
> > Zenith 90 liters tank.
>
> >
>
> > This fuel already contains
two stroke oil in the ratio of 1:130 per
>
> > volume.
>
> >
>
> > In a cylindrical ungraduated container I poured 25 ml of tap water
and
>
> > added 200 ml of fuel
>
> >
>
> > After 1 hour and several
vigourous shakings I observed an increase in
>
> > the volume of water to 40 ml
>
> >
>
> > The increase is about 4% (?)
>
> >
>
> > All quantities are approximate.
>
> >
>
> > Since I began running and flying my 1986 Mazda 13B engine, I have
tested
>
> > in flight all grades of mogas and also 100LL avgas. I would wait
until
>
> > my fuel level was very low and would fill my tank with the différent
>
> > grade. Never detected a change in the performance of my engine. The
only
>
> > times I drew water from my fuel tank was when it was filled with
100LL
>
> > avgas.
>
> >
>
> > Yvon Cournoyer.
>
> >
>
> >
>
> >
>
> >
>
> >
>
> > --
>
> > Homepage:
http://www.flyrotary.com/
>
> > Archive and UnSub:
http://mail.lancaironline.net:81/lists/flyrotary/List.html
>
>
>
>
>
>
--
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Cables
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