Weight of fuel
David Holland
Avgas weighs in pounds [lbs].
TIA
David Holland
United Kingdom
Ron McAvoy
ounces.
Therefore 1 (US) Gal. = 8lb, 1 (UK)Gal. = 10lb
HTH
--
Ron McAvoy.
David Holland <davidh...@figurework.co.uk> wrote in message
news:84pkga$7ko$1...@quince.news.easynet.net...
C087018
Scott
steve
--
Stephen Ford
David G. Bell
davidh...@figurework.co.uk "David Holland" wrote:
> I shall be very grateful if someone can tell me how much one US gallon of
> Avgas weighs in pounds [lbs].
Getting out my trusty cardboard flight computer (and it might be
cheaper, if you want one, to buy it from a US source rather than one of
the UK pilot shop places), I get a figure of 6lbs per US gallon for
AvGas, 7.2lbs per Imperial gallon.
--
David G. Bell -- Farmer, SF Fan, Filker, and Punslinger.
Lars Eriksson
>
> I believe 1 gallon(US) = 16 Fluid ounces whereas 1 gallon (UK) = 20 Fluid
> ounces.
> Therefore 1 (US) Gal. = 8lb, 1 (UK)Gal. = 10lb
>
lars
Ron McAvoy
I should (of course) have been talking about fluid ounces to the PINT, not
the Gallon.
How on Earth do you expect me to do it in Metric when I can't even manage
our own system? :o))
--
Ron McAvoy.
Lars Eriksson <le...@ateam.aland.fi> wrote in message
news:38708262...@ateam.aland.fi...
Brett Sumpter
JetA is approximately 6.5 lbs/gal
Brett
"David Holland" <davidh...@figurework.co.uk> wrote:
>I shall be very grateful if someone can tell me how much one US gallon of
>Avgas weighs in pounds [lbs].
>
Dave Potter
> I shall be very grateful if someone can tell me how much one US gallon of
> Avgas weighs in pounds [lbs].
>
> TIA
>
> David Holland
> United Kingdom
According to the Aircraft Information Manual for my Comanche 260B, weights
are as follows:
100/130 octane avgas is calibrated at 6.0 Lbs/Gal
100LL avgas is calibrated at 5.82 Lbs/Gal
I don't have the figure for 80/87 octane - my plane can't use it, but it's
not around much anymore anyway.
You didn't ask, but should you ever need to know, ashless dispersant oil is
calibrated at 7.5 Lbs/Gal. Neither engine oil nor fuel are included in the
aircraft basic empty weight.
steve
(not 4.6)
i.e. 6
--
Stephen Ford
St...@s-ford.demon.co.uk
"CoLiN" <pi...@flight2000.com> wrote in message
news:+7ZwOCONHo+hhpY68pv+UG=eA...@4ax.com...
> I hope you don't use that answer during your checkride.
> AvGas is 6 lbs/US Gal.
>
>
>
> On Mon, 3 Jan 2000 10:39:00 -0000, "steve" <st...@s-ford.demon.co.uk> told
> the whole world:
>
> >the real answer is:
> >
> >1 imperial gallon = 1.2 Us Gallons
> >
> >1 US Gallon = 0.8 Imp Gallons
> >
> >0.8 x 10 x 0.72 = 4.6 lbs
> >
> >Wanna know why I know? Click on the link below and follow the fly.htm
link
> >
> >http://www.s-ford.demon.co.uk.
>
>
>
> ------------------------------
> Colin Nah
> http://www.vdc.com.sg/
> http://www.colin.net/
> email:co...@vdc.com.sg
>
> PGP Fingerprint:9AF2 1D27 CFE8 0A8D 4DBE 2CA6 8ABC C9D6
> ------------------------------
> "Good judgment comes from experience and experience comes from bad
judgment."
Jeremy D. Grotte
Fluid ounces and ounces (as in 16 per pound) are not the same.
1 U.S. gallon of gas weighs about 6.1 lbs/gallon.
1 U.S. gallon of pure water (nothing but H2O) weighs real close to 8 lbs.
1 cu.ft. of water = 7.5 gallons, 1cu.ft. of water weighs 62.5lbs, do the
math, you get 8.3 or so lbs/gallon...
1 U.S. gallon of JP-8 (Jet Fuel, F-1) weighs about 6.7lbs/gallon (in winter,
usually 6.8lbs/gallon)
By the way, gas includes:avgas, regular, unleaded, super unleaded, premium,
and farts...
"Ron McAvoy" <r...@antispam.freeserve.co.uk> wrote in message
news:84q1ea$l60$1...@news6.svr.pol.co.uk...
Ron McAvoy
I knew that.
I was just checking who was paying attention.
Honest
And anyway, there's an 'R' in the month.<G>
How big is a US ounce then? Or does it change according to what's being
measured?
Set fuel quantity to 1 gallon in FS2000 and it says 6lbs. I assume its US
Gallons and pounds, since its from Microsoft. No wonder I'M confused. How's
Mr Holland doing? I think I'll have a lie down now.
--
Ron McAvoy.
Jeremy D. Grotte <jdgr...@ndak.net> wrote in message
news:s720gal...@corp.supernews.com...
Pete Daly
Pizza
One US gallon weighs approx. 6lbs
One UK gallon weighs approx 7.2lbs
Both measures relate to 100 octane avgas
DPizza
David Holland <davidh...@figurework.co.uk> wrote in article
<84pkga$7ko$1...@quince.news.easynet.net>...
Jim Schmidt
gal = 8 pints = 8 pounds = (8x16 ounces)
Jeremy D. Grotte wrote in message ...
Scott Taylor
David Holland <davidh...@figurework.co.uk> wrote in message
news:84pkga$7ko$1...@quince.news.easynet.net...
David CL Francis
<st...@s-ford.demon.co.uk> writes
>the real answer is:
>
>1 imperial gallon = 1.2 Us Gallons
>
>1 US Gallon = 0.8 Imp Gallons
>
but 1.25. i.e. your first two statements above cannot both be accurate.
1 UK gal = 4.54609 litres
1 US gal = 3.78541 litres
Therefore 1 US gal = 0.82997 UK gal
and 1 UK gal = 1.20095 US gal
I give you the 1.2 figure but not the 0.8! :-)
>0.8 x 10 x 0.72 = 4.6 lbs
^^^
Perhaps you should get a new abacus? :-(
0.8 x 10 x 0.72 = 5.76
--
Francis E-Mail reply to <fli...@dclf.demon.co.uk>
Bob Weber
...[snip]...
> How big is a US ounce then? Or does it change according to what's being
> measured?
> Set fuel quantity to 1 gallon in FS2000 and it says 6lbs. I assume its US
> Gallons and pounds, since its from Microsoft. No wonder I'M confused. How's
> Mr Holland doing? I think I'll have a lie down now.
Troy ounce = 373.236 grams. 12 oz troy = 1 pound
Avoirdupois ounce = 453.6 grams. 16 oz avdp = 1 pound
Origin of trivia question of which weighs more, a pound of gold or a
pound of feathers. Answer is pound of feathers (avdp) weighs more than
a pound of gold (troy).
The fuel quantity menus for the 737 show 1 gal = 6.6015 lbs in FS98 and
6.601563 lbs in FS2000. If you go to Options - Settings - International
and select metric (alt in meters) in FS2000, then check fuel you'll see
that fuel weights change to 0.791131 kg/L.
--
Regards,
Bob,
en...@home.com
Chris Hatt
>
> Troy ounce = 373.236 grams. 12 oz troy = 1 pound
> Avoirdupois ounce = 453.6 grams. 16 oz avdp = 1 pound
Hm, so a pound is 16x453.6=7257.6g - just over 7 kilos?
I think you'll find that 453.6g = 1 pound, and that one ounce is about
28g!
--
Chris Hatt
USER ERROR: Replace user and press any key to continue...
David G. Bell
itd...@its.hants.gov.uk "Chris Hatt" wrote:
> Bob Weber wrote:
> >
> > Troy ounce = 373.236 grams. 12 oz troy = 1 pound
> > Avoirdupois ounce = 453.6 grams. 16 oz avdp = 1 pound
>
> Hm, so a pound is 16x453.6=7257.6g - just over 7 kilos?
>
> I think you'll find that 453.6g = 1 pound, and that one ounce is about
> 28g!
This is the sort of mistake which gets made with a global search-and-
replace, when the abbreviation for _grains_ is replaced by "grams".
Ron McAvoy
--
Ron McAvoy.
Bob Weber <en...@home.com> wrote in message
news:387436DF...@home.com...
>
> Troy ounce = 373.236 grams. 12 oz troy = 1 pound
> Avoirdupois ounce = 453.6 grams. 16 oz avdp = 1 pound
Bob Weber
Chris Hatt wrote:
>
> Bob Weber wrote:
> >
> > Troy ounce = 373.236 grams. 12 oz troy = 1 pound
> > Avoirdupois ounce = 453.6 grams. 16 oz avdp = 1 pound
>
> Hm, so a pound is 16x453.6=7257.6g - just over 7 kilos?
>
> I think you'll find that 453.6g = 1 pound, and that one ounce is about
> 28g!
>
> --
> Chris Hatt
>
> USER ERROR: Replace user and press any key to continue...
--
Regards,
Bob,
en...@home.com
PlaneDoc
Actually, when weighing an aircraft and computing the basic empty
weight, engine oil IS included, as well as any un-useable fuel.
I've weighed quite a few aircraft in the past 20 years, and the usual
practice is to either top off the tanks, then subtract the weight of
useable fuel to get the empty weight, or drain the tanks, then add the
weight of the un-useable fuel. In either case, the oil system must be
fully serviced, (hydraulics, too). I think this is spelled out in the
FARs.
PJ
<davidh...@figurework.co.uk> wrote:
>I shall be very grateful if someone can tell me how much one US gallon of
>Avgas weighs in pounds [lbs].
>
>TIA
>
>David Holland
>United Kingdom
>
>
Howdy
There are a lot of answers but the real one is approximately 6 pounds.
A Canadian gal weighs 7.2 lbs. and a US gal is app 80% of Can gallon.
This answer comes from the book titled Commercial Pilot Ground School
Course by Culhane
PJ
Dave Potter
On Mon, 03 Jan 2000 06:36:45 -0600, Dave Potter <n...@spam.com> wrote:
Actually, when weighing an aircraft and computing the basic empty
weight, engine oil IS included, as well as any un-useable fuel.
I've weighed quite a few aircraft in the past 20 years.......... etc, etc,etc
It's _NOT_ in my airplane. It
isn't an arguable point, far as I'm concerned. But to put emphasis
on what I said in my previous post, here's the format for the weight and
balance example provided in the Aircraft Information Manual for my Comanche:
WEIGHT ARM
MOMENT
BASIC EMPTY WT:
***ENGINE OIL***
FUEL (INBD TANKS)
FUEL (OUTBD TANKS)
PILOT/PASSENGER
PILOT/PASSENGERS-CENTER SEATS
PASSENGERS (5TH/6TH SEATS)
BAGGAGE
I left out the arm numbers - they aren't relevant. I follow the documentation for the airplane I own and, according to the FARs you seem to be so fond of, I am personally responsible to see that it is operated safely.
If you want to ignore the second line (above) when running weight and balance numbers for a flight _in my airplane_, be my guest. I won't do it. That line is just as important as any of the others in the list.
Dave Potter
Comanche 260B N9142P
David G. Bell
n...@spam.com "Dave Potter" wrote:
I was going to wonder why the engine oil was under its own heading, and
why it might ever be expected to change, when I recalled a reference to
the limiting factor on in-flight refuelling being the engine oil
reserves for the aircraft.
So maybe it does make sense to figure things that way, but any
responsible pilot would keep the engine oil level up to the mark, and
for other purposes than c-of-g it could be regarded as a constant
weight.
Dave Potter
> I was going to wonder why the engine oil was under its own heading, and
> why it might ever be expected to change, when I recalled a reference to
> the limiting factor on in-flight refuelling being the engine oil
> reserves for the aircraft.
>
> So maybe it does make sense to figure things that way, but any
> responsible pilot would keep the engine oil level up to the mark, and
> for other purposes than c-of-g it could be regarded as a constant
> weight.
The regulatory situation has apparently changed since my airplane was built (1966)
with regard to this.
I checked the FARs as they are now written, and empty weight does include engine oil
as PlaneDoc wrote. This would apply to all aircraft built after the FAR amendment
occurred, whenever that was.
I don't have at my fingertips the actual documents for my Comanche right now, they're
with the plane in the shop - But I do have the Aircraft Information Manual, and it
clearly specifies that engine oil is to be factored into the weight and balance
computation, along with everything else loaded into the plane for the particular
flight. There is an added section giving procedures to weigh the airplane, and an
explicit instruction to "drain engine oil" can be found there.
I would agree, however, that the weight of engine oil is not going to change enough
in one flight, at least one hopes it doesn't, that it would play a major role in the
balance equation. It's just that it's important to understand whether the starting
point for empty weight for the a/c in question was done with engine oil included, or
not. For _my_ airplane, it wasn't, back in those days, so I have 525 inch pounds of
moment to factor into a wt/bal calculation, or I'll get an incorrect result.
Guy Glover
Dave Potter wrote:
> According to the Aircraft Information Manual for my Comanche 260B, weights
> are as follows:
>
> 100/130 octane avgas is calibrated at 6.0 Lbs/Gal
> 100LL avgas is calibrated at 5.82 Lbs/Gal
>
> I don't have the figure for 80/87 octane - my plane can't use it, but it's
> not around much anymore anyway.
>
> You didn't ask, but should you ever need to know, ashless dispersant oil is
> calibrated at 7.5 Lbs/Gal. Neither engine oil nor fuel are included in the
> aircraft basic empty weight.
I think you may be wrong here (or I am always doing my weights and balances
wrong) I beleive that empty weight includes oil and unuseable fuel
Guy
Dave Potter
> I think you may be wrong here (or I am always doing my weights and balances
> wrong) I beleive that empty weight includes oil and unuseable fuel
>
> Guy
I posted a semi-correction earlier.
I may be wrong about the airplane(s) you fly, but I'm not wrong about my Comanche
- and literally thousands of the other "mature" airplanes flying around out there
which were built before the FAA redefined "empty weight".
The FARs _NOW_ do state that empty weight includes oil.
However, my plane was built in 1966. All documentation for it clearly shows that
I must add the weight of engine oil in weight and balance calculations, meaning
that for MY plane, it is NOT included in the empty weight. I happen to have
Owner's Manuals for the 1969 Cessna Skylane, the 1967 Cessna Skyhawk, and the
1975 Grumman Traveler. The weight and balance sample format for each one
includes a line for factoring the weight of engine oil into the loading
calculations.
So it appears that sometime after 1975, the definition of empty weight was
changed to include engine oil, where before that time, it did not.
David CL Francis
In article <3898FF53...@ns.sympatico.ca>, John Fraser
<jfr...@ns.sympatico.ca> writes
>Good evening Dave;
>
> You're correct about the 1.25. One imperial gallon is 160 ounces
>(five quarts) as compared to a U.S. gallon which is 128 ounces (four
>quarts) therefore 1 U.S. gallon = 0.8 imperial gallon. How
>complicated can this get?
>
It's not really that complicated! Sorry if I made it sound it. However
the British quart is different from the U.S. one. The fluid ounce seems
to be the same though. The British pint is 20 ounces making 8 pints and
4 quarts to the gallon. A British gallon of fresh water weighs 10 lb.
>
>David CL Francis wrote:
>>
[a lot of stuff]
Where have you been John? I wrote that note on the 4th January. It has
expired from my files!
John Fraser
I just recently added rec.aviation.simulators to my list of
newsgroups. For some reason, it has retained posts as unread going
as far back as last December. I never noted the date until after I
posted my opinion. Here in Canada (we accommodate everyone) and
having once used imperial, then switching to metric, and frequently
encountering U.S. measurements, it's no fun. I was trying to clarify
a minor error. I apologize for the confusion.
Cheers,
John
Dean Tiegs
David CL Francis <fli...@dclf.demon.co.uk> wrote:
> It's not really that complicated! Sorry if I made it sound it. However
> the British quart is different from the U.S. one. The fluid ounce
seems
> to be the same though. The British pint is 20 ounces making 8 pints
and
> 4 quarts to the gallon. A British gallon of fresh water weighs 10 lb.
The fluid ounces are not the same either.
1 fl oz US = 1.040 843 fl oz imp
1 gal US = 0.832 674 2 gal imp
This is because the US gallon is defined as 231 in³, and the fluid
ounce as 1/128 of that. The imperial gallon was defined differently,
10 lb of water at 62°F and 30 inHg. The imperial fluid ounce is 1/160
of that.
--
Dean Tiegs, 53.50948° N, 113.64590° W, +668 m
NE¼-20-52-25-W4 <324 550, 5 932 210, 12U>
"Confortare et esto robustus"
Sent via Deja.com http://www.deja.com/
Before you buy.
David CL Francis
writes
>The fluid ounces are not the same either.
>1 fl oz US = 1.040 843 fl oz imp
>1 gal US = 0.832 674 2 gal imp
>
>This is because the US gallon is defined as 231 in³, and the fluid
>ounce as 1/128 of that. The imperial gallon was defined differently,
>10 lb of water at 62°F and 30 inHg. The imperial fluid ounce is 1/160
>of that.
The plot thickens! Nothing is as simple as it might seem.
My reference defines the UK gallon as 4.54609 dm^3
and the US Gallon as 3.78541 dm^3
Dividing the first by 160 gives 0.028413062 dm^3
Dividing the second by 128 gives 0.029573515 dm^3
So you are certainly correct. Is nothing sacred? Who chose 231 in^3 as
the US gallon? By the way it is amazing that your superscript '3' past
through the various gateways unscathed to my machine. It will be
interesting to see if it returns to you unscathed.
David CL Francis
In article <389E07FA...@ns.sympatico.ca>, John Fraser
<jfr...@ns.sympatico.ca> writes
>Good afternoon Dave;
>
> I just recently added rec.aviation.simulators to my list of
>newsgroups. For some reason, it has retained posts as unread going
>as far back as last December. I never noted the date until after I
>posted my opinion. Here in Canada (we accommodate everyone) and
>having once used imperial, then switching to metric, and frequently
>encountering U.S. measurements, it's no fun. I was trying to clarify
>a minor error. I apologize for the confusion.
No apology is necessary - I was not complaining. It is just that it is
unusual to get a response after such a long interval.
Your problem is almost certainly down to either your news reader or your
ISP. When I subscribe I can tell my newsreader how many days back I wish
to collect news and also define how long the messages stay on my
machine. I expire this group after 14 days.
ISPs have their own expiry times and 21 days would be typical for a main
stream group (which this is).
You will also note from another answer that my assumption that the
ounces are the same in UK and US measurements is also slightly wrong!
One US ounce is 1.04084 UK ounces!
David
Pierre Neel
<fli...@nospam.demon.co.uk> wrote:
> Is nothing sacred? Who chose 231 in^3 as
>the US gallon?
It's certainly more simple than metric :))
231 = 3 x 7 x 11 so if you make simple calculation, you must retrieve
the surface of the Pyramid of Gizeh mesured in coudees^2 and by this
the distance from Earth to Jupiter !
Happy flying
--
Pierre Néel
Pierr...@wanadoo.fr
--