Hi,(adsbygoogle = window.adsbygoogle || []).push({});

I am trying to calculate weight transfer from the front to rear of a vehicle and have already calculated the total sprung weight to be transfered.

I now need to calculate the Roll resistance generated by the springs using the following forumula and this is where the error occurs.

(SF/(WmF/SmF)^2) x TF^2 [ x ] 2 x ∏ / 180 = ArF

In laymens terms

SF = Front Spring Rate

WmF=Front Wheel Movement

SmF=Relative Front Spring Movement

TF = Front Track

ArF = Roll Resistance of Front Springs

Now i can't figure out if the x i placed in brackets [ ] is supposed to be / (x or /)?

The example is as follows;

(175/(1.00/0.75)^2)xTF^2x2xPi/180 = 2889.77 in.lbs per degree (roll resistance of front springs)

you will notice that the formula does not equate to the answer and to obtain the answer i must devide.... which present me with a problem as my understanding of this particular aspect is clouded by my understanding of the units...

I realise this is probably a 'suck eggs' moment but can somebody explain in practical terms what is meant by in.lbs per degree... the amount of in.lbs per degree of roll but in.lbs is both a distance and a weight...

Any help with either or both of the above problems will be much appreciated.

Regards

Jason

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Roll resistance calculations error?

Loading...

Similar Threads for Roll resistance calculations |
---|

Air resistance: cylindrical rotor in stator with air gap |

Negative Heat Sink thermal resistance |

Calculating rolling resistance force and coefficient |

**Physics Forums | Science Articles, Homework Help, Discussion**