Author | Topic |
Location: sydney
Registered: December 2002
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Re: TORQUE
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Tue, 24 June 2003 08:33

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oldcorollas wrote on Tue, 24 June 2003 17:17 |
what you forget to mention is gearing. your electric motor idea. one motor, 1Nm@1000rpm, second = 1Nm@20000rpm. the second motor does indeed have more power, but if connected thru the same gearing, will have the same accelerative force at the wheels as the first motor.
to use power effectively, you have to take advantage of GEARING.
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very true, so far. but you shot yourself in the foot there, as you seem to have forgotten to examine what happens when you gear the car so both those cars with their respective rpm are at the same "road speed"? when you drop the flag the car with the gearing set for the motor to turn 20,000rpm will leave the other car for dead. but the engines of both are still making only 1Nm.
remember, torque has no motion. torque is simply twisting force. with motion comes power.
if torque was all important, the f1 boys wouldnt bother with the huge hassle of engineering a motor to turn over 18,000rpm (theyre close to 19,000rpm this year).
but they have a gearbox with more than 1 gear plus they know that power is what moves the car.
oldcorollas wrote on Tue, 24 June 2003 17:17 |
the power issue is misinterpreted by many ppl to be most important. a famous quote(and i can't even remember who said it now..) was "power sells cars, torque wins races" and that is true.
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actually its not there are many sayings in the automotive world. another is that "there is no replacement for displacement". i wonder if you ascribe to that one also?
oldcorollas wrote on Tue, 24 June 2003 17:17 |
BUT, for the same car speed, the F1 motor will have a GEARING advantage of 3:1 over the normal car engine, and so the TORQUE AT THE WHEELS will be 3 times higher, so for a given car mass, will accellerate 3 times faster.
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it perplexes me that you mistake power for torque above, yet go on to state the following ....
oldcorollas wrote on Tue, 24 June 2003 17:17 |
two cars with identical POWER at different rpm, at the same road speed, will accelerate at the same rate, since GEARING multiplies the torque of the motor with higher rpm at same power.
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clearly power is accelleration, not torque. you even said it yourself.
ever wonder why engineers look at power to weight, to gauge performance, and car mags list power to weight among a cars spec? because acceleration is the result of power to weight. and because torque to weight is irrelevant 
i occasionally marvel that such a simple issue as this is so commonly misunderstood. the reason is that a lot of people with only a loose grasp of the concepts try to explain on forums such as these, yet keep contracdicting themselves. its no wonder then that the novice becomes confused.
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| Subject | Poster | Date |
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TORQUE
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BAD22 | Sat, 21 June 2003 04:43 |
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Re: TORQUE
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oldcorollas | Sat, 21 June 2003 07:20 |
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Re: TORQUE
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trent_kershaw | Sat, 21 June 2003 09:52 |
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Re: TORQUE
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wilbo666 | Sat, 21 June 2003 12:29 |
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Re: TORQUE
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BAD22 | Sat, 21 June 2003 13:06 |
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Re: TORQUE
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TA22-3SGTE | Sat, 21 June 2003 13:20 |
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Re: TORQUE
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gianttomato | Sun, 22 June 2003 02:18 |
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Re: TORQUE
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rusty | Mon, 23 June 2003 19:37 |
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Re: TORQUE
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BAD22 | Tue, 24 June 2003 01:57 |
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Re: TORQUE
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oldcorollas | Tue, 24 June 2003 07:17 |
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Re: TORQUE
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rusty | Tue, 24 June 2003 08:33 |
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Re: TORQUE
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oldcorollas | Tue, 24 June 2003 09:32 |
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Re: TORQUE
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gianttomato | Tue, 24 June 2003 09:42 |
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Re: TORQUE
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Gremlin | Thu, 26 June 2003 02:16 |
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Re: TORQUE
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rusty | Tue, 24 June 2003 10:29 |
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Re: TORQUE
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oldcorollas | Tue, 24 June 2003 11:12 |
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Re: TORQUE
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gianttomato | Tue, 24 June 2003 11:46 |
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Re: TORQUE
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oldcorollas | Tue, 24 June 2003 12:01 |
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Re: TORQUE
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trent_kershaw | Tue, 24 June 2003 14:03 |
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Re: TORQUE
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NO-18r | Sat, 21 June 2003 08:48 |
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Re: TORQUE
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BAD22 | Sat, 21 June 2003 08:49 |
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Re: TORQUE
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manipulate | Sat, 21 June 2003 08:51 |
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Re: TORQUE
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manipulate | Sat, 21 June 2003 13:10 |
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Re: TORQUE
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BAD22 | Sat, 21 June 2003 13:12 |
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Re: TORQUE
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cam_RA40 | Sat, 21 June 2003 23:17 |
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Re: TORQUE
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JDM hachi | Sat, 21 June 2003 22:52 |
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Re: TORQUE
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manipulate | Sun, 22 June 2003 01:55 |
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Re: TORQUE
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charliechalk | Sun, 22 June 2003 11:26 |
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Re: TORQUE
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BAD22 | Sun, 22 June 2003 15:58 |
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Re: TORQUE
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gianttomato | Mon, 23 June 2003 01:05 |
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Re: TORQUE
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charliechalk | Mon, 23 June 2003 08:06 |
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Re: TORQUE
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BAD22 | Mon, 23 June 2003 10:00 |
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Re: TORQUE
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Super Jamie | Tue, 24 June 2003 11:04 |
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Re: TORQUE
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kingmick | Tue, 24 June 2003 12:18 |
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Re: TORQUE
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THE WITZL | Tue, 24 June 2003 12:27 |
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Re: TORQUE
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trent_kershaw | Tue, 24 June 2003 12:44 |
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Re: TORQUE
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THE WITZL | Tue, 24 June 2003 13:06 |
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Re: TORQUE
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rusty | Tue, 24 June 2003 16:35 |
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Re: TORQUE
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juzzo84 | Tue, 24 June 2003 21:08 |
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Re: TORQUE
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boudan | Tue, 24 June 2003 22:49 |
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Re: TORQUE
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Super Jamie | Wed, 25 June 2003 07:26 |
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Re: TORQUE and shite stirring
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oldcorollas | Wed, 25 June 2003 12:27 |
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Re: TORQUE and shite stirring
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oldcorollas | Wed, 25 June 2003 12:36 |
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Re: TORQUE
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boudan | Thu, 26 June 2003 00:37 |
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Re: TORQUE
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bayka | Wed, 25 June 2003 17:41 |
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Re: TORQUE
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Norbie | Wed, 25 June 2003 22:37 |
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Re: TORQUE
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dar_sbb | Thu, 26 June 2003 01:58 |
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Re: TORQUE
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bayka | Thu, 26 June 2003 05:49 |
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Re: flat TORQUE curves
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oldcorollas | Thu, 26 June 2003 06:23 |
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Re: flat TORQUE curves
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Nark | Thu, 26 June 2003 06:45 |
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Re: flat TORQUE curves
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oldcorollas | Thu, 26 June 2003 07:03 |
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