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rob guess (Beast)
Member
Username: Beast

Post Number: 297
Registered: 5-2003
Posted on Sunday, September 07, 2003 - 7:13 am:   

Robert;

you might wat to take a look at this link from the MIT web site.

http://web.mit.edu/charvak/Public/torquevspower.html

on his main page he also has a few links in about Ferraris.

http://web.mit.edu/charvak/www/index.html

Looks like the work of a student that has very good taste.

Rob


DGS (Dgs)
Member
Username: Dgs

Post Number: 302
Registered: 5-2003
Posted on Sunday, September 07, 2003 - 6:47 am:   


quote:

Nice work Quah, but what does one leg =


A "Quarter Horse", of course. ( http://www.q-horse.com/ ) (Ya gotta know these scuderia terms.)
Mitch Alsup (Mitch_alsup)
Intermediate Member
Username: Mitch_alsup

Post Number: 1015
Registered: 4-2002
Posted on Saturday, September 06, 2003 - 9:57 pm:   

HP(rpm) = TQ(rpm) * rpm / 5252
Jim Schad (Jim_schad)
Intermediate Member
Username: Jim_schad

Post Number: 1816
Registered: 7-2002
Posted on Friday, September 05, 2003 - 9:26 am:   

figures...the link looks to be to University of Arkansas.
Robert (Rjklein4470)
Member
Username: Rjklein4470

Post Number: 293
Registered: 3-2002
Posted on Friday, September 05, 2003 - 9:15 am:   

Thanks Jim

Nice work Quah, but what does one leg =
Lawrence Coppari (Lawrence)
Member
Username: Lawrence

Post Number: 760
Registered: 4-2002
Posted on Friday, September 05, 2003 - 9:05 am:   

Horsepower is not force times distance. That is work. Power is the rate of doing work so there must be units of time in it. Your equation 1 is misleading.

1 HP = force(lbs) X Distance (ft)/time (sec)/550

so if you exert 550 lbs of force over 1 foot in one second, you have 1 horsepower.
Steve Magnusson (91tr)
Intermediate Member
Username: 91tr

Post Number: 2087
Registered: 1-2001
Posted on Friday, September 05, 2003 - 8:56 am:   

I'd like to see the look on the dyno operator's face when you ask him/her how much "force" your engine is making . For rotational machines:

(horse)power = torque x RPM x whatever constants you need to make the units work out

is the more useful form.

(Jim you missed a "divide by 5252" in Eqn. 1 -- but I think Eqn. 1 is missing "the time required to move the distance"? Eqn 2 looks OK though.)
Quah Trout (Quah)
New member
Username: Quah

Post Number: 3
Registered: 1-2003
Posted on Friday, September 05, 2003 - 8:44 am:   

# of legs divided by 4 <g>
Jim Schad (Jim_schad)
Intermediate Member
Username: Jim_schad

Post Number: 1815
Registered: 7-2002
Posted on Friday, September 05, 2003 - 8:44 am:   

In the United States, the horsepower unit is the commonly used measure of the power output of internal combustion engines and electric motors. By definition, one horsepower is the ability to do 33,000 foot-pounds (ft-lbs) of work in one minute (or 550 ft-lbs of work in one second). The basic horsepower formula is presented below as Equation 1:


Equation 1: Horsepower = Force, lbs. X Distance, ft.

http://www.uark.edu/depts/aeedhp/agscience/MEASWORK.htm
Robert (Rjklein4470)
Member
Username: Rjklein4470

Post Number: 292
Registered: 3-2002
Posted on Friday, September 05, 2003 - 8:33 am:   

I know that I should know this, but sadly I do not. I understand the theory behind what horse power is, but what is the formula to arrive at what one horse power ='s

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