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Net horsepower

All that has to do with the power train, gearbox, clutch, fuels and lubricants, etc. Generally the mechanical side of Formula One.
Mikey_s
Mikey_s
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Joined: 21 Dec 2005, 11:06

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Maybe it's nothing to do with bendy wings at all, perhaps Ferrari just have an extra 2 engines hidden on board!! :lol:
Mike
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Reca
Reca
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Joined: 21 Dec 2003, 18:22
Location: Monza, Italy

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Ciro Pabòn wrote: Drag Power = 5.4 * (318/3.6)^3 / (2 * 746 ) = 2.500 hp :lol:

It would be nice for someone to correct this.
First of all on our beloved planet standard air density is 1.225 kg/m3, not 12 kg/m3, thank God I would say ;-) so the first coefficient would be 0.5 * 1.225 * 0.9 = 0.55 and not 0.5 * 12 * 0.9 = 5.4
Then you divide it by 2 while you shouldn’t (you already included the 0.5 in the coefficient 5.4).
Consequently you get something about 5 times higher than your assumption of SCd = 0.9 m2 should lead to.
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Ted68
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Joined: 20 Mar 2006, 05:19
Location: Osceola, PA, USA

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Didn't someone post that old Car & Driver test of the Jaguar F1 somewhere? They had the acceleration numbers listed. you could easily put those values into one of the many 1/4 mile calculators on the web and have the answer in a few seconds. That is if Ford/Cosworth were honest with the power numbers they gave the magazine.
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Ciro Pabón
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Ted68 wrote:Didn't someone post that old Car & Driver test of the Jaguar F1 somewhere? They had the acceleration numbers listed. you could easily put those values into one of the many 1/4 mile calculators on the web and have the answer in a few seconds. That is if Ford/Cosworth were honest with the power numbers they gave the magazine.
I have kept the Car & Driver figures, given in an unusable html format in an Excel sheet at my site. You can find them here. But I have no 1/4 mile figures for F1's... I guess is around 7.5 seconds.
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m3_lover
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Joined: 26 Jan 2006, 07:29
Location: St.Catharines, Ontario, Canada

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I will look today and put it on later today, I have the magazine
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jgredline
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Joined: 16 Jan 2006, 07:07
Location: Los Angeles

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Wow, Bench racing at its finest.
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Ciro Pabón
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Joined: 11 May 2005, 00:31

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Oops. I did not posted the URL for the Car & Driver Excel sheet: there you go.
Ciro
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Frenchblock
Frenchblock
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Joined: 30 Mar 2006, 03:59

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hp's sells cars, torque wins races! :wink:
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Jersey Tom
Jersey Tom
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Joined: 29 May 2006, 20:49
Location: Huntersville, NC

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Eh, not entirely. Figure how much torque an F1 car puts out.. assume they make 750hp at 17000rpm... that's only 230ft lbs of torque. You can have a high-revving, high-power car with relatively minimal torque like in F1 and just gear it down to get absurd amounts of thrust, or you can have a low-revving, high-torque car like the R10. Each has its benefits and is suited to different styles of racing.
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wazojugs
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Joined: 31 Mar 2006, 18:53
Location: UK

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Frenchblock wrote:hp's sells cars, torque wins races! :wink:
Once you have shifted the cars weight you don't need a lot of torque.

BHP is the figure to have when track racing
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jgredline
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Frenchblock wrote:hp's sells cars, torque wins races! :wink:
I can't think of one form of motor racing where torque wins races. Its all about Hp. If we want to make this very technical and overly complicated it is not possible to make Hp with out a torque increase regardless of RPM. Hp is the result of torque at a given RPM. A flat torque curve will give you a broad HP/RPM range. A torque monster like a chevy or ford V8 will not make a lot of Hp because of the lack of revs. Even in Nextel Cup racing its all about RPM. RPM=HP. In some series like the IRL where there is a rev limiter, then you will work backwards and have an engine that will peak at 10300RPM and because of the short revs will make more torque than if it had a rev limit say 14000 rpm. In either case its still all about Hp. Not torque. I know someone will say, well the Renault engine had a lot of torque and its did/does, but it also has a lot of Hp because its revs. They simply have the best engine right now as much as hate to say it.
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Tom
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Joined: 13 Jan 2006, 00:24
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Frenchblock said
hp's sells cars, torque wins races!
I put that in an earlier post i think, so true. Any yob can quote BHP figures but how many of them know what torque is?

(was discussing the plausability of inserting a Rolls Royce Merlin into a Citroen AX with said yob and when I revealed it was in fact a V12 from the Spitfire plane he, to my amazment, suggested it would have nowhere near enough torque to power the little car!!!)
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Jersey Tom
Jersey Tom
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Joined: 29 May 2006, 20:49
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Area under the torque curve wins races? Any takers?

Edit - and I might add the Merlin is a sweet engine!
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jgredline
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Jersey Tom wrote:Area under the torque curve wins races? Any takers?

Edit - and I might add the Merlin is a sweet engine!
Explain what you mean??
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flynfrog
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Joined: 23 Mar 2006, 22:31

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jgredline wrote:
Jersey Tom wrote:Area under the torque curve wins races? Any takers?

Edit - and I might add the Merlin is a sweet engine!
Explain what you mean??
a broad power curve makes the car more drivable

it has more power in more places than a peaky power curve

you can get by with less gears and ussaly drive harder out of a cornner

why do you think f1 has 7 gears they make all of there power in a verry narrow area
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