Fuel prices-BTU's per Gal.

Don't like to beat a dead horse, but--

As C.S. Nixon said--"let me make myself perfectly clear"

I agree that a gallon of Mogas has more btu's than a gallon of Avgas


The main reason being--1 gal mogas= 7.422 lbs.
1 gal avgas= 6.978 lbs.

Q.E.D.

On Wed, 30 May 2007 15:10:29 GMT, Jerry Wass
wrote:

Don't like to beat a dead horse, but--

As C.S. Nixon said--"let me make myself perfectly clear"

I agree that a gallon of Mogas has more btu's than a gallon of Avgas


The main reason being--1 gal mogas= 7.422 lbs.
1 gal avgas= 6.978 lbs.

Q.E.D.

Per Wikipedia, and my friends who do weight/balance calcs, the avgasd
number above is alittle, like 18%, off ...

Avgas has a density of 6.02 lb/US gallon at 15 °C, or 0.72 kg/l, and
this density is commonly used for weight and balance computation.
Density increases to 6.40 lb/US gallon at -40 °C, and decreases by
about 0.5% per 5 °C increase in temperature.[3]

[3] is # ^ MacDonald, Sandy A. F.; Isabel L. Peppler [1941] (2004).
"Chapter 10. Airmanship", From The Ground Up, Millennium Edition,
Ottawa, Ontario, Canada: Aviation Publishers Co. Limited, pp. 265,
261. ISBN 0-9680390-5-7.

AirBP says "AVGAS 100LL: Aviation Gasoline for Reciprocating Engines
with lower maximum lead content. Color: Blue. Flash point: Below 0
degrees F. API gravity: 64-7. Relative density: .6582-.7238".

Water is likely the density of 1.000, and is about 8.34 lb/gal
suggesting the 6 lb/gal is a pretty good number.

I'd like to know the source for your 6.978 ...

Jerry Wass wrote:

Don't like to beat a dead horse, but--

As C.S. Nixon said--"let me make myself perfectly clear"

I agree that a gallon of Mogas has more btu's than a gallon of Avgas


The main reason being--1 gal mogas= 7.422 lbs.
1 gal avgas= 6.978 lbs.

Q.E.D.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Jerry,
Your pet horse may be dead...
but, the autopsy is not yet complete.
Check out the posts after yours.

P.S.
You made yourself perfectly clear while absorbed
in computing one error after another. G

I simply choose to cut to the chase,
posting what the experts established,
probably, a half century ago.

HOW it's done, matters not to me.
I could have presented the math here,
if required, and had your ambition.

Kudos for your efforts and more importantly...
your willingness to admit mistakes. Takes a
real man to do that.

Be well.


- Barnyard BOb -

GeorgeB wrote:
On Wed, 30 May 2007 15:10:29 GMT, Jerry Wass
wrote:

Don't like to beat a dead horse, but--

As C.S. Nixon said--"let me make myself perfectly clear"

I agree that a gallon of Mogas has more btu's than a gallon of Avgas


The main reason being--1 gal mogas= 7.422 lbs.
1 gal avgas= 6.978 lbs.

Q.E.D.

Per Wikipedia, and my friends who do weight/balance calcs, the avgasd
number above is alittle, like 18%, off ...

Avgas has a density of 6.02 lb/US gallon at 15 °C, or 0.72 kg/l, and
this density is commonly used for weight and balance computation.
Density increases to 6.40 lb/US gallon at -40 °C, and decreases by
about 0.5% per 5 °C increase in temperature.[3]

[3] is # ^ MacDonald, Sandy A. F.; Isabel L. Peppler [1941] (2004).
"Chapter 10. Airmanship", From The Ground Up, Millennium Edition,
Ottawa, Ontario, Canada: Aviation Publishers Co. Limited, pp. 265,
261. ISBN 0-9680390-5-7.

AirBP says "AVGAS 100LL: Aviation Gasoline for Reciprocating Engines
with lower maximum lead content. Color: Blue. Flash point: Below 0
degrees F. API gravity: 64-7. Relative density: .6582-.7238".

Water is likely the density of 1.000, and is about 8.34 lb/gal
suggesting the 6 lb/gal is a pretty good number.

I'd like to know the source for your 6.978 ...

My Sources a a 5 gal can of Avgas bought for break-in purposes on my
rebuilt engine--about two weeks ago, and kept in a S.Steel can of the
variety used for holding Coke/Pepsi syrup at vending booths.--air tight.
good for 125 psi(has to hold the CO2 pressure)

a 5 gal jug of Mogas bought a week ago for my lawnmower.

a 250 CC graduated Lab-type beaker, & a metric balance type scale
accurate to 0.1 gm.

The Avgas weighed 168.3 gms/250cc---The Mogas weighed 179.0gm/250cc----

Please let me know If I made any mistakes in the conversion----If not,
I'll re-weigh two more samples tomorrow..

On Thu, 31 May 2007 00:25:09 GMT, Jerry Wass
wrote:

GeorgeB wrote:
On Wed, 30 May 2007 15:10:29 GMT, Jerry Wass
wrote:

Don't like to beat a dead horse, but--

As C.S. Nixon said--"let me make myself perfectly clear"

I agree that a gallon of Mogas has more btu's than a gallon of Avgas


The main reason being--1 gal mogas= 7.422 lbs.
1 gal avgas= 6.978 lbs.

Q.E.D.

Per Wikipedia, and my friends who do weight/balance calcs, the avgasd
number above is alittle, like 18%, off ...

Avgas has a density of 6.02 lb/US gallon at 15 °C, or 0.72 kg/l, and
this density is commonly used for weight and balance computation.
Density increases to 6.40 lb/US gallon at -40 °C, and decreases by
about 0.5% per 5 °C increase in temperature.[3]

[3] is # ^ MacDonald, Sandy A. F.; Isabel L. Peppler [1941] (2004).
"Chapter 10. Airmanship", From The Ground Up, Millennium Edition,
Ottawa, Ontario, Canada: Aviation Publishers Co. Limited, pp. 265,
261. ISBN 0-9680390-5-7.

AirBP says "AVGAS 100LL: Aviation Gasoline for Reciprocating Engines
with lower maximum lead content. Color: Blue. Flash point: Below 0
degrees F. API gravity: 64-7. Relative density: .6582-.7238".

Water is likely the density of 1.000, and is about 8.34 lb/gal
suggesting the 6 lb/gal is a pretty good number.

I'd like to know the source for your 6.978 ...

My Sources a a 5 gal can of Avgas bought for break-in purposes on my
rebuilt engine--about two weeks ago, and kept in a S.Steel can of the
variety used for holding Coke/Pepsi syrup at vending booths.--air tight.
good for 125 psi(has to hold the CO2 pressure)

a 5 gal jug of Mogas bought a week ago for my lawnmower.

a 250 CC graduated Lab-type beaker, & a metric balance type scale
accurate to 0.1 gm.

The Avgas weighed 168.3 gms/250cc---The Mogas weighed 179.0gm/250cc----

Please let me know If I made any mistakes in the conversion----If not,
I'll re-weigh two more samples tomorrow..

Sounds right to me. SG has an effect on the energy content, but it is
NOT an indicator of octane. MoGas has a higher energy density than
AvGas (generally).

--
Posted via a free Usenet account from http://www.teranews.com

Jerry Wass wrote:

I agree that a gallon of Mogas has more btu's than a gallon of Avgas


The main reason being--1 gal mogas= 7.422 lbs.
1 gal avgas= 6.978 lbs.

Q.E.D.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Not true, Jerry.

Ready Reference Files

Weight of One Gallon (U.S.) of Water, Gasoline, and Ethanol

1 gallon of water equals 8.33 lbs.
1 gallon of gasoline equals 5.8 to 6.5 lbs.
1 gallon of ethanol equals 6.59 lbs.

Source: U.S. Dept. of Energy. Fuel From Farms: a Guide to Small Scale
Ethanol Production. May 1980. Page D-3.

Verified by: JT, 9/98

Disclaimer:
While the Library has verified the information presented in these
files in what it considers to be reliable and authoritative sources,
it cannot take responsibility for nor guarantee the accuracy of the
information presented.

---------------------------------------

Avgas
From Wikipedia, the free encyclopedia

Properties
Avgas has a density of 6.02 lb/US gallon at 15 °C, or 0.72 kg/l, and
this density is commonly used for weight and balance computation.
Density increases to 6.40 lb/US gallon at -40 °C, and decreases by
about 0.5% per 5 °C increase in temperature.[3]

On Thu, 31 May 2007 00:25:09 GMT, Jerry Wass
wrote:

The main reason being--1 gal mogas= 7.422 lbs.
1 gal avgas= 6.978 lbs.

Avgas has a density of 6.02 lb/US gallon at 15 °C, or 0.72 kg/l, and

The Avgas weighed 168.3 gms/250cc---The Mogas weighed 179.0gm/250cc----

Please let me know If I made any mistakes in the conversion----If not,
I'll re-weigh two more samples tomorrow..

Plugging your avgas numbers into my conversion software, I get 0.371
lb / 0.066 gal for your measurements ... which my calculator gives as
5.62 lb.gal. I didn't run the mogas.

One of us has bad conversion data, maybe both of us.

George

GeorgeB wrote:
On Thu, 31 May 2007 00:25:09 GMT, Jerry Wass
wrote:

The main reason being--1 gal mogas= 7.422 lbs.
1 gal avgas= 6.978 lbs.

Avgas has a density of 6.02 lb/US gallon at 15 °C, or 0.72 kg/l, and

The Avgas weighed 168.3 gms/250cc---The Mogas weighed 179.0gm/250cc----

Please let me know If I made any mistakes in the conversion----If not,
I'll re-weigh two more samples tomorrow..

Plugging your avgas numbers into my conversion software, I get 0.371
lb / 0.066 gal for your measurements ... which my calculator gives as
5.62 lb.gal. I didn't run the mogas.

One of us has bad conversion data, maybe both of us.

George

Doing the simplest conversion---168.3/250.0--= sp.gr.of 0.6732..

0.6732X 8.34(#/gal for h2o)= 5.614 #/gal for Avgas--agreeing with
you--but isn't right---I'm gonna weigh things again--might have been off
on my tare weight. Jerry

Jerry Wass wrote:


Doing the simplest conversion---168.3/250.0--= sp.gr.of 0.6732..

0.6732X 8.34(#/gal for h2o)= 5.614 #/gal for Avgas--agreeing with
you--but isn't right---I'm gonna weigh things again--might have been off
on my tare weight. Jerry
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

I don't keep avgas at my house. However....

Weighing 250 cc of 60 degree F. mogas = 190 grams

Specific gravity = 190/250cc = 0.76

0.76 x 8.34 = 6.3384....

MOGAS = 6.3384 lb/gal @ 60 degrees F.

More than close enough for GW Bush gov't work!



Barnyard BOb - definitely beating YOUR dead horse 8-)

Barnyard BOb wrote:
Jerry Wass wrote:

I agree that a gallon of Mogas has more btu's than a gallon of Avgas


The main reason being--1 gal mogas= 7.422 lbs.
1 gal avgas= 6.978 lbs.

Q.E.D.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Not true, Jerry.

Ready Reference Files

Weight of One Gallon (U.S.) of Water, Gasoline, and Ethanol

1 gallon of water equals 8.33 lbs.
1 gallon of gasoline equals 5.8 to 6.5 lbs.
1 gallon of ethanol equals 6.59 lbs.

Source: U.S. Dept. of Energy. Fuel From Farms: a Guide to Small Scale
Ethanol Production. May 1980. Page D-3.

Verified by: JT, 9/98

Disclaimer:
While the Library has verified the information presented in these
files in what it considers to be reliable and authoritative sources,
it cannot take responsibility for nor guarantee the accuracy of the
information presented.

---------------------------------------

Avgas
From Wikipedia, the free encyclopedia

Properties
Avgas has a density of 6.02 lb/US gallon at 15 °C, or 0.72 kg/l, and
this density is commonly used for weight and balance computation.
Density increases to 6.40 lb/US gallon at -40 °C, and decreases by
about 0.5% per 5 °C increase in temperature.[3]

Yes, I'm beginning to doubt my measurements, haven't had time to repeat
them yet. Jerry