Formulas?

[jd1828]

ive taken 2.5 years of physics if you count both highschool and college. im currently near failing calc right now.


as for you question, there is a way to relate it to horsepower but it is not easy. there are some other things you will
need to know.

a number for the change in rpm of the tire and the inertia of the tire.


now for some crazy math stuff. i do problems like this a lots so they are not too bad for me

1.take the change in rpm of the tire and change that into radians per sec. then divide by the
total time of the change. that will give you radians per sec^2. this is your rotational acceleration

2.then mutiply by the inertia which gives you an average torque during the time period

3.take the change in rpm and change it into radians per sec

4.mutiply by the torque in #2 which gives you foot pounds force per sec.

5 divide by (1hp/550 foot pounds force per sec) this gives your horsepower

that looks about right to me.

[Super Bleeder!!]

i'm in calc 271 right now, calc 2 i guess. it sucks huge ass, its so goddamn hard. what majors are all of you foolios going for?

i'm attempting Mech. Eng here, but i still have a long way to go

[Jakey]

Originally posted by gixxer@Oct 29 2003, 12:04 AM
i'm in calc 271 right now, calc 2 i guess. it sucks huge ass, its so goddamn hard. what majors are all of you foolios going for?

i'm attempting Mech. Eng here, but i still have a long way to go
I'm in my second year in the power & machinery area of Iowa State's agricultural engineering program. It is damn close to mechanical engineering but agricultural based.

[Kracka]

Business Finance major with a Psychology minor. This semester I am taking Calc I for the 2nd time and god damn I am failing it again! I just am not able to figure out this spatial shit...I get striaght A's in my other math courses (statistics for example), but this calculus junk just can not be related to real-life in a not pointless way. CVD: add calculus to your list.

[Super Bleeder!!]

don't worry dude, i took calc 1 three times at my shitty old community college before i got it right (kinda) its seriously ALL ABOUT THE TEACHER. they can make the material hell, or they can make it easy to digest, but either way way its fucking gay.

[jd1828]

im in calc 1 for the second time and will probably be in it for a 3rd time

[Jakey]

Originally posted by gixxer@Oct 29 2003, 12:33 PM
..... its seriously ALL ABOUT THE TEACHER. they can make the material hell, or they can make it easy to digest, but either way way its fucking gay.
I totally agree with that, I was fortunate enough to get an awesome teacher for Calc I and Calc II.

[A//// Guy]

Alrighty... well I want to go into a business major.. but work on computers... Have to decide this year..

But anyway back to those formulas.... I guess there are no easy ways.. besides what CVD said, so then with that example you can gain 20 horses by shedding 10 pounds off each wheel? Doesnt seem like much I guess... 10 pounds is alot though...

How much do stock 16" 1G wheels way?

[ABV]

How can you convert lost weight into gained hp? Horsepower is not a function of the weight of your wheels. If you're talking about lighter pistons or flywheel or something, then you can gain some power. But even if you had no wheels on your car at all, it would still have the same power at the crank as if you had 400 lb wheels on it.

[A//// Guy]

Im not talking power at the crank... Im talking power at the wheels... Same applies to both pistons or flywheel compared to wheels becuase lighter wheels will be easier to spin therefor you gain horsepower becuase the engine can push harder and not loose power through transfer.