keith c raymond
ArboristSite Operative
The question is how much power can black paint on Husky Simonized cylinders increase horsepower?
What is Horsepower?
- Thread starter Simonizer
- Start date
Help Support Arborist Forum:
The question is how much power can black paint on Husky Simonized cylinders increase horsepower?
13.56854% increase........................
.
Don't know the difference between diesel and gas HP but I do know a 28.6 HP Isuzu diesel rated at 3450 RPM cuts twice as fast as a 27 HP Kohler gas rated at 3600 RPM on my band saw. Torque!!!! Steve
Mr. Obvious
ArboristSite Operative
Keep your rocket in your pocket Mr. Spacemule.:hmm3grin2orange:
Hard Knocks
ArboristSite Operative
The big difference between gas and diesel ratings here is Peak HP VS working HP. Most if not all small engine manufacturers rate there engines at peak HP where most diesel and industrial engine manufacturers rate engines with working HP. Working HP is typically 30% to 40% less than peak HP.
Briggs and Stratton has been forced to start rating their engines by peak torque instead of Peak HP. They have been accused of giving there engines HP ratings that would be possible to achieve in their intended application.
upandcommer
ArboristSite Operative
Mechanical horsepower
See History of the term "horsepower"
The term horsepower was invented by the engineer James Watt in 1782. Watt (1736 to 1819) is most famous for his work on improving the performance of steam engines.
Watt was working with ponies lifting coal at a coal mine, and he wanted to define the power available from one of these animals. He found that, on average, a mine pony could do 22,000 foot-pounds (lift a bucket of coal weighing 22,000 lb. a distance of 1-foot) of work in a minute. He then increased that number by 50 percent and fixed the measurement of horsepower at 33,000-foot-pounds of work in one minute.
Under this system, one horsepower is defined as:
1 hp = 33,000 ft·pound-force·min−1 = exactly 745.69987158227022 W
[edit] Metric horsepower
Metric horsepower began in Germany in the 19th century and became popular across Europe and Asia. The various units used to indicate this definition ("PS", "CV", "pk", and "ch") all translate to "horse power" in English, so it is common to see these values referred to as "horsepower" or "hp" in the press releases or media coverage of the German, French, Italian, and Japanese automobile companies. British manufacturers often intermix metric horsepower and mechanical horsepower depending on the origin of the engine in question.
Metric horsepower, as a rule, is defined as 0.73549875 kW, or roughly 98.6% of mechanical horsepower. This was a minor issue in the days when measurement systems varied widely and engines produced less power, but has become a major sticking point today. Exotic cars from Europe like the McLaren F1 and Bugatti Veyron are often quoted using the wrong definition, and their power output is sometimes even converted twice because of confusion over whether the original "horsepower" number was metric or mechanical.
Electrical horsepower
The electrical horsepower is used by the electrical industry for electrical machines and is defined to be exactly 746 W (at 100% efficiency).
Relationship with torque
For a given torque, the equivalent power may be calculated. The standard equation relating torque in foot-pounds, rotational speed in RPM and horsepower is:
P / {\rm hp} = {[\tau / ({\rm ft \cdot lbf})] [\omega / ({\rm r/min})] \over 5252}
Outside the United States, most countries use the newton meter as the unit of torque. Most automobile specifications worldwide have torque listed in newton meters. The standard equation relating torque in newton meters, rotational speed in RPM and power in kilowatts is:
P / {\rm kW} = {[\tau / ({\rm N \cdot m })] [\omega / ({\rm r/min})] \over 9549}
These are based on Watt's definition of the mechanical horsepower. The constants 5252 and 9549 are rounded; the exact values are 16,500/π and 30,000/π, respectively.
Sorry for the long winded post but since the horsepower has differing definitions given different applications this needed to be thrown out there.
this to me is why not only do chainsaw manufacturers publish hp numbers but kw as well as this is more of a standard definable measure of work over time.
See History of the term "horsepower"
The term horsepower was invented by the engineer James Watt in 1782. Watt (1736 to 1819) is most famous for his work on improving the performance of steam engines.
Watt was working with ponies lifting coal at a coal mine, and he wanted to define the power available from one of these animals. He found that, on average, a mine pony could do 22,000 foot-pounds (lift a bucket of coal weighing 22,000 lb. a distance of 1-foot) of work in a minute. He then increased that number by 50 percent and fixed the measurement of horsepower at 33,000-foot-pounds of work in one minute.
Under this system, one horsepower is defined as:
1 hp = 33,000 ft·pound-force·min−1 = exactly 745.69987158227022 W
[edit] Metric horsepower
Metric horsepower began in Germany in the 19th century and became popular across Europe and Asia. The various units used to indicate this definition ("PS", "CV", "pk", and "ch") all translate to "horse power" in English, so it is common to see these values referred to as "horsepower" or "hp" in the press releases or media coverage of the German, French, Italian, and Japanese automobile companies. British manufacturers often intermix metric horsepower and mechanical horsepower depending on the origin of the engine in question.
Metric horsepower, as a rule, is defined as 0.73549875 kW, or roughly 98.6% of mechanical horsepower. This was a minor issue in the days when measurement systems varied widely and engines produced less power, but has become a major sticking point today. Exotic cars from Europe like the McLaren F1 and Bugatti Veyron are often quoted using the wrong definition, and their power output is sometimes even converted twice because of confusion over whether the original "horsepower" number was metric or mechanical.
Electrical horsepower
The electrical horsepower is used by the electrical industry for electrical machines and is defined to be exactly 746 W (at 100% efficiency).
Relationship with torque
For a given torque, the equivalent power may be calculated. The standard equation relating torque in foot-pounds, rotational speed in RPM and horsepower is:
P / {\rm hp} = {[\tau / ({\rm ft \cdot lbf})] [\omega / ({\rm r/min})] \over 5252}
Outside the United States, most countries use the newton meter as the unit of torque. Most automobile specifications worldwide have torque listed in newton meters. The standard equation relating torque in newton meters, rotational speed in RPM and power in kilowatts is:
P / {\rm kW} = {[\tau / ({\rm N \cdot m })] [\omega / ({\rm r/min})] \over 9549}
These are based on Watt's definition of the mechanical horsepower. The constants 5252 and 9549 are rounded; the exact values are 16,500/π and 30,000/π, respectively.
Sorry for the long winded post but since the horsepower has differing definitions given different applications this needed to be thrown out there.
this to me is why not only do chainsaw manufacturers publish hp numbers but kw as well as this is more of a standard definable measure of work over time.
ShoerFast
Tree Freak
- Joined
- Nov 14, 2005
- Messages
- 25,843
- Reaction score
- 17,230
+1 , but shooting blanks.
:hmm3grin2orange: :hmm3grin2orange: :hmm3grin2orange: :hmm3grin2orange:
.
ShoerFast
Tree Freak
- Joined
- Nov 14, 2005
- Messages
- 25,843
- Reaction score
- 17,230
Plugging in good ol math, sort of like a 5 cubic inch saw on a Lewis wench making 7.2727 HP
"to get maximum use of your Lewis Winch. It will pull up to 4,000 lbs. with a larger saw (5 cubic inch) and the line speed is approximately 60 ft. per minute."
http://store.baileys-online.com/cgi-bin/baileys/580?mv_session_id=tRbCUpgg&product_sku=LW 400 MK2
Not dogging the Lewis Winch, but they must have been using black paint on there 5 cubic inch cylinder to get that math to work?
Last edited:
Simonizer
Addicted to ArboristSite
What is a Lewis wench? Some kind of gasoline-powered blow-up doll you have down there?
opcorn:
What is a Lewis wench? Some kind of gasoline-powered blow-up doll you have down there?
Well it sure beats a Hoe.......................:hmm3grin2orange: :hmm3grin2orange:
.
ShoerFast
Tree Freak
- Joined
- Nov 14, 2005
- Messages
- 25,843
- Reaction score
- 17,230
What is a Lewis wench? Some kind of gasoline-powered blow-up doll you have down there?
There made in British Columbia, for those not bent on an agenda, I included a link for the non-engineer-wanna-bees.
NovaMan
ArboristSite Operative
I'm a car guy, so I would say HP is torque (in lb-ft) times RPM divided by 5252.
sILlogger
Addicted to ArboristSite
Horsepower is a f*ing blast!!!! thats what it is. the more the better
16:1mix
Addicted to ArboristSite
Last edited:
spacemule
The Peanut Gallery
That's easy. Horsepower is what is lost when drunken rednecks "tweek" things (port, polish, drill holes, get Dremel tools out, etc.) :rockn:
RaisedByWolves
Addicted to ArboristSite
Why am I even posting here......
.
.
Simonizer
Addicted to ArboristSite
Both succinct and accurate. Bravo.
