Torque/HP curves
02-26-2006, 03:52 PM
#51
Guest
Posts: n/a
Re: Torque/HP curves
Well they won't cross if the engine won't rev to 5252 rpm !!!
Dave
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:44020F29.43C379E9@***.net...
> "immaterial"! Make a graph where the torque and horsepower do not
> cross.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Dave Milne wrote:
> >
> > Read it carefully - I said 5252 rpm. Although I made a small mistake - I
> > said a circle of 1 foot diameter and I meant a circle of 1 foot radius.
> > As to whether an engine will rev that high or what type of cam it uses
to
> > get there is immaterial ; it just means that the power and torque curves
> > WILL NOT cross each other.
> >
> > Dave
Dave
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:44020F29.43C379E9@***.net...
> "immaterial"! Make a graph where the torque and horsepower do not
> cross.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Dave Milne wrote:
> >
> > Read it carefully - I said 5252 rpm. Although I made a small mistake - I
> > said a circle of 1 foot diameter and I meant a circle of 1 foot radius.
> > As to whether an engine will rev that high or what type of cam it uses
to
> > get there is immaterial ; it just means that the power and torque curves
> > WILL NOT cross each other.
> >
> > Dave
02-26-2006, 03:52 PM
#52
Guest
Posts: n/a
Re: Torque/HP curves
Well they won't cross if the engine won't rev to 5252 rpm !!!
Dave
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:44020F29.43C379E9@***.net...
> "immaterial"! Make a graph where the torque and horsepower do not
> cross.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Dave Milne wrote:
> >
> > Read it carefully - I said 5252 rpm. Although I made a small mistake - I
> > said a circle of 1 foot diameter and I meant a circle of 1 foot radius.
> > As to whether an engine will rev that high or what type of cam it uses
to
> > get there is immaterial ; it just means that the power and torque curves
> > WILL NOT cross each other.
> >
> > Dave
Dave
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:44020F29.43C379E9@***.net...
> "immaterial"! Make a graph where the torque and horsepower do not
> cross.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Dave Milne wrote:
> >
> > Read it carefully - I said 5252 rpm. Although I made a small mistake - I
> > said a circle of 1 foot diameter and I meant a circle of 1 foot radius.
> > As to whether an engine will rev that high or what type of cam it uses
to
> > get there is immaterial ; it just means that the power and torque curves
> > WILL NOT cross each other.
> >
> > Dave
02-26-2006, 03:52 PM
#53
Guest
Posts: n/a
Re: Torque/HP curves
Well they won't cross if the engine won't rev to 5252 rpm !!!
Dave
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:44020F29.43C379E9@***.net...
> "immaterial"! Make a graph where the torque and horsepower do not
> cross.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Dave Milne wrote:
> >
> > Read it carefully - I said 5252 rpm. Although I made a small mistake - I
> > said a circle of 1 foot diameter and I meant a circle of 1 foot radius.
> > As to whether an engine will rev that high or what type of cam it uses
to
> > get there is immaterial ; it just means that the power and torque curves
> > WILL NOT cross each other.
> >
> > Dave
Dave
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:44020F29.43C379E9@***.net...
> "immaterial"! Make a graph where the torque and horsepower do not
> cross.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Dave Milne wrote:
> >
> > Read it carefully - I said 5252 rpm. Although I made a small mistake - I
> > said a circle of 1 foot diameter and I meant a circle of 1 foot radius.
> > As to whether an engine will rev that high or what type of cam it uses
to
> > get there is immaterial ; it just means that the power and torque curves
> > WILL NOT cross each other.
> >
> > Dave
02-26-2006, 07:33 PM
#54
Guest
Posts: n/a
Re: Torque/HP curves
Hi Dave,
I see if I make apples equal oranges, in a graph I've never seen
before, where I used the same numbers for horsepower as torque they will
cross close to your numbers:
http://www.----------.com/temp/3.7LV...rqueChart2.jpg
God Bless America, Bill O|||||||O
mailto:--------------------
Dave Milne wrote:
>
> Well they won't cross if the engine won't rev to 5252 rpm !!!
>
> Dave
I see if I make apples equal oranges, in a graph I've never seen
before, where I used the same numbers for horsepower as torque they will
cross close to your numbers:
http://www.----------.com/temp/3.7LV...rqueChart2.jpg
God Bless America, Bill O|||||||O
mailto:--------------------
Dave Milne wrote:
>
> Well they won't cross if the engine won't rev to 5252 rpm !!!
>
> Dave
02-26-2006, 07:33 PM
#55
Guest
Posts: n/a
Re: Torque/HP curves
Hi Dave,
I see if I make apples equal oranges, in a graph I've never seen
before, where I used the same numbers for horsepower as torque they will
cross close to your numbers:
http://www.----------.com/temp/3.7LV...rqueChart2.jpg
God Bless America, Bill O|||||||O
mailto:--------------------
Dave Milne wrote:
>
> Well they won't cross if the engine won't rev to 5252 rpm !!!
>
> Dave
I see if I make apples equal oranges, in a graph I've never seen
before, where I used the same numbers for horsepower as torque they will
cross close to your numbers:
http://www.----------.com/temp/3.7LV...rqueChart2.jpg
God Bless America, Bill O|||||||O
mailto:--------------------
Dave Milne wrote:
>
> Well they won't cross if the engine won't rev to 5252 rpm !!!
>
> Dave
02-26-2006, 07:33 PM
#56
Guest
Posts: n/a
Re: Torque/HP curves
Hi Dave,
I see if I make apples equal oranges, in a graph I've never seen
before, where I used the same numbers for horsepower as torque they will
cross close to your numbers:
http://www.----------.com/temp/3.7LV...rqueChart2.jpg
God Bless America, Bill O|||||||O
mailto:--------------------
Dave Milne wrote:
>
> Well they won't cross if the engine won't rev to 5252 rpm !!!
>
> Dave
I see if I make apples equal oranges, in a graph I've never seen
before, where I used the same numbers for horsepower as torque they will
cross close to your numbers:
http://www.----------.com/temp/3.7LV...rqueChart2.jpg
God Bless America, Bill O|||||||O
mailto:--------------------
Dave Milne wrote:
>
> Well they won't cross if the engine won't rev to 5252 rpm !!!
>
> Dave
02-26-2006, 07:33 PM
#57
Guest
Posts: n/a
Re: Torque/HP curves
Hi Dave,
I see if I make apples equal oranges, in a graph I've never seen
before, where I used the same numbers for horsepower as torque they will
cross close to your numbers:
http://www.----------.com/temp/3.7LV...rqueChart2.jpg
God Bless America, Bill O|||||||O
mailto:--------------------
Dave Milne wrote:
>
> Well they won't cross if the engine won't rev to 5252 rpm !!!
>
> Dave
I see if I make apples equal oranges, in a graph I've never seen
before, where I used the same numbers for horsepower as torque they will
cross close to your numbers:
http://www.----------.com/temp/3.7LV...rqueChart2.jpg
God Bless America, Bill O|||||||O
mailto:--------------------
Dave Milne wrote:
>
> Well they won't cross if the engine won't rev to 5252 rpm !!!
>
> Dave
02-26-2006, 11:15 PM
#58
Guest
Posts: n/a
Re: Torque/HP curves
Bill, you are right in that this makes apples equal to oranges, because
torque and power do not even describe the same physical quantity. Dave's
5252 rpm is an accident of the units used, and has no physical significance
whatsoever. By proper selection of units or system of measurement, one
could say that "torque is always equal to power at XXX rpm" where XXX is any
number!
If you convert to the SI (International System) and use rotational velocity
instead of rpm, you come up with the relation
W = T * r
where W is power in watts, T is torque in newton-meters, and r is radial
velocity in radians (a dimensionless quantity) per second. Under this
system, the graphs cross when r is equal to 1.
SI units are explained at
http://www.wsdot.wa.gov/reference/metrics/factors.htm
Earle
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:440248D7.14442579@***.net...
> Hi Dave,
> I see if I make apples equal oranges, in a graph I've never seen
> before, where I used the same numbers for horsepower as torque they will
> cross close to your numbers:
> http://www.----------.com/temp/3.7LV...rqueChart2.jpg
> God Bless America, Bill O|||||||O
> mailto:--------------------
>
> Dave Milne wrote:
> >
> > Well they won't cross if the engine won't rev to 5252 rpm !!!
> >
> > Dave
torque and power do not even describe the same physical quantity. Dave's
5252 rpm is an accident of the units used, and has no physical significance
whatsoever. By proper selection of units or system of measurement, one
could say that "torque is always equal to power at XXX rpm" where XXX is any
number!
If you convert to the SI (International System) and use rotational velocity
instead of rpm, you come up with the relation
W = T * r
where W is power in watts, T is torque in newton-meters, and r is radial
velocity in radians (a dimensionless quantity) per second. Under this
system, the graphs cross when r is equal to 1.
SI units are explained at
http://www.wsdot.wa.gov/reference/metrics/factors.htm
Earle
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:440248D7.14442579@***.net...
> Hi Dave,
> I see if I make apples equal oranges, in a graph I've never seen
> before, where I used the same numbers for horsepower as torque they will
> cross close to your numbers:
> http://www.----------.com/temp/3.7LV...rqueChart2.jpg
> God Bless America, Bill O|||||||O
> mailto:--------------------
>
> Dave Milne wrote:
> >
> > Well they won't cross if the engine won't rev to 5252 rpm !!!
> >
> > Dave
02-26-2006, 11:15 PM
#59
Guest
Posts: n/a
Re: Torque/HP curves
Bill, you are right in that this makes apples equal to oranges, because
torque and power do not even describe the same physical quantity. Dave's
5252 rpm is an accident of the units used, and has no physical significance
whatsoever. By proper selection of units or system of measurement, one
could say that "torque is always equal to power at XXX rpm" where XXX is any
number!
If you convert to the SI (International System) and use rotational velocity
instead of rpm, you come up with the relation
W = T * r
where W is power in watts, T is torque in newton-meters, and r is radial
velocity in radians (a dimensionless quantity) per second. Under this
system, the graphs cross when r is equal to 1.
SI units are explained at
http://www.wsdot.wa.gov/reference/metrics/factors.htm
Earle
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:440248D7.14442579@***.net...
> Hi Dave,
> I see if I make apples equal oranges, in a graph I've never seen
> before, where I used the same numbers for horsepower as torque they will
> cross close to your numbers:
> http://www.----------.com/temp/3.7LV...rqueChart2.jpg
> God Bless America, Bill O|||||||O
> mailto:--------------------
>
> Dave Milne wrote:
> >
> > Well they won't cross if the engine won't rev to 5252 rpm !!!
> >
> > Dave
torque and power do not even describe the same physical quantity. Dave's
5252 rpm is an accident of the units used, and has no physical significance
whatsoever. By proper selection of units or system of measurement, one
could say that "torque is always equal to power at XXX rpm" where XXX is any
number!
If you convert to the SI (International System) and use rotational velocity
instead of rpm, you come up with the relation
W = T * r
where W is power in watts, T is torque in newton-meters, and r is radial
velocity in radians (a dimensionless quantity) per second. Under this
system, the graphs cross when r is equal to 1.
SI units are explained at
http://www.wsdot.wa.gov/reference/metrics/factors.htm
Earle
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:440248D7.14442579@***.net...
> Hi Dave,
> I see if I make apples equal oranges, in a graph I've never seen
> before, where I used the same numbers for horsepower as torque they will
> cross close to your numbers:
> http://www.----------.com/temp/3.7LV...rqueChart2.jpg
> God Bless America, Bill O|||||||O
> mailto:--------------------
>
> Dave Milne wrote:
> >
> > Well they won't cross if the engine won't rev to 5252 rpm !!!
> >
> > Dave
02-26-2006, 11:15 PM
#60
Guest
Posts: n/a
Re: Torque/HP curves
Bill, you are right in that this makes apples equal to oranges, because
torque and power do not even describe the same physical quantity. Dave's
5252 rpm is an accident of the units used, and has no physical significance
whatsoever. By proper selection of units or system of measurement, one
could say that "torque is always equal to power at XXX rpm" where XXX is any
number!
If you convert to the SI (International System) and use rotational velocity
instead of rpm, you come up with the relation
W = T * r
where W is power in watts, T is torque in newton-meters, and r is radial
velocity in radians (a dimensionless quantity) per second. Under this
system, the graphs cross when r is equal to 1.
SI units are explained at
http://www.wsdot.wa.gov/reference/metrics/factors.htm
Earle
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:440248D7.14442579@***.net...
> Hi Dave,
> I see if I make apples equal oranges, in a graph I've never seen
> before, where I used the same numbers for horsepower as torque they will
> cross close to your numbers:
> http://www.----------.com/temp/3.7LV...rqueChart2.jpg
> God Bless America, Bill O|||||||O
> mailto:--------------------
>
> Dave Milne wrote:
> >
> > Well they won't cross if the engine won't rev to 5252 rpm !!!
> >
> > Dave
torque and power do not even describe the same physical quantity. Dave's
5252 rpm is an accident of the units used, and has no physical significance
whatsoever. By proper selection of units or system of measurement, one
could say that "torque is always equal to power at XXX rpm" where XXX is any
number!
If you convert to the SI (International System) and use rotational velocity
instead of rpm, you come up with the relation
W = T * r
where W is power in watts, T is torque in newton-meters, and r is radial
velocity in radians (a dimensionless quantity) per second. Under this
system, the graphs cross when r is equal to 1.
SI units are explained at
http://www.wsdot.wa.gov/reference/metrics/factors.htm
Earle
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:440248D7.14442579@***.net...
> Hi Dave,
> I see if I make apples equal oranges, in a graph I've never seen
> before, where I used the same numbers for horsepower as torque they will
> cross close to your numbers:
> http://www.----------.com/temp/3.7LV...rqueChart2.jpg
> God Bless America, Bill O|||||||O
> mailto:--------------------
>
> Dave Milne wrote:
> >
> > Well they won't cross if the engine won't rev to 5252 rpm !!!
> >
> > Dave