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#1
04-04-2006, 12:14 AM
 Carel Guest Posts: n/a
Brake Horse power to newton meter torque

How do I convert 480 Brake Horse Power to newton meter torque?
#2
04-05-2006, 03:08 PM
 Robert Fogt Administrator Join Date: Dec 2005 Location: Seattle, WA Posts: 3,468 Rep Power: 13
Re: Brake Horse power to newton meter torque

Horsepower to Torque is not a direct conversion. You would also need to know the RPM. As the conversion would differ for each RPM.

Here is some additional information, in addition to the formulas you need.
http://www.car-videos.net/articles/h...wer_torque.asp
#3
07-27-2010, 02:12 AM
 Unregistered Guest Posts: n/a
Re: Brake Horse power to newton meter torque

how do you work out brake horse power??
#4
07-27-2010, 02:38 AM
 JohnS Moderator Join Date: Dec 2007 Location: SE Michigan, USA Posts: 9,551 Rep Power: 19
Re: Brake Horse power to newton meter torque

Quote:
 Originally Posted by Unregistered how do you work out brake horse power??
You have to know the torque and the rotational speed.

In English units, you need torque in foot-pounds, and rotational speed in radians per second. Multiply the two to get power in foot pounds-force per second; 1 HP = 550 ft-lbf/s

In metric units, the product of torque in newton-meters, and rotational speed in radians per second is power in watts. 1 HP = 746 W (rounded)

Note: If you have rotational speed in RPM, multiply by 2*pi and divide by 60 to get radians per second.
#5
08-24-2010, 05:33 AM
 Unregistered Guest Posts: n/a
Re: Brake Horse power to newton meter torque

Quote:
 Originally Posted by Carel How do I convert 480 Brake Horse Power to newton meter torque?
HP= Torque in Newton meters x RPM
__________________________

5252

You must know RPM or max. and min rpm of the rotor or wheel and you will have max and min HP
#6
08-24-2010, 06:44 AM
 JohnS Moderator Join Date: Dec 2007 Location: SE Michigan, USA Posts: 9,551 Rep Power: 19
Re: Brake Horse power to newton meter torque

Quote:
 Originally Posted by Unregistered HP= Torque in Newton meters x RPM __________________________ 5252 You must know RPM or max. and min rpm of the rotor or wheel and you will have max and min HP
I agree both torque and rpm are needed.

Your constant of 5252 is wrong. It results from 1 HP = 33000 ft·lbf/min, and converting revolutions to radians (2*pi). Dividng yields about 5252, but only works for torque in ft·lbf.

For metric, multiply RPM by 2*pi/60 to get radians per second, that times newton·meters of torque gives watts; divide by 745.7 W/hp to get horsepower. That net result of all that is replace 5252 by 7120.9 (or 7121). Of course in metric, the proper thing to do is stop with watts or kilowatts. Horsepower is for farmers.
#7
03-23-2011, 06:26 PM
 Unregistered Guest Posts: n/a
Re: Brake Horse power to newton meter torque

plz tell me the conversion of horse power to newton meter
#8
07-05-2012, 12:19 PM
 Unregistered Guest Posts: n/a
Re: Brake Horse power to newton meter torque

Quote:
 Originally Posted by Carel How do I convert 480 Brake Horse Power to newton meter torque?
how do i convert 110 newton meters to brake horse power
#9
07-05-2012, 03:51 PM
 JohnS Moderator Join Date: Dec 2007 Location: SE Michigan, USA Posts: 9,551 Rep Power: 19
Re: Brake Horse power to newton meter torque

Quote:
 Originally Posted by Unregistered how do i convert 110 newton meters to brake horse power
You also need RPM. See post #4 or #6 for details.
#10
02-26-2013, 08:23 PM
 nafees ur rehman Guest Posts: n/a
Re: Brake Horse power to newton meter torque

[QUOTE=JohnS;72849]I agree both torque and rpm are needed.

Your constant of 5252 is wrong. It results from 1 HP = 33000 ft·lbf/min, and converting revolutions to radians (2*pi). Dividng yields about 5252, but only works for torque in ft·lbf.

For metric, multiply RPM by 2*pi/60 to get radians per second, that times newton·meters of torque gives watts; divide by 745.7 W/hp to get horsepower. That net result of all that is replace 5252 by 7120.9 (or 7121). Of course in metric, the proper thing to do is stop with watts or kilowatts. WE ARE PERFECT RESULT FOR ENGINE TESTING PROCEDURE I AGREE WIT THIS COMMENTS

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