- #1
Jas1159
- 19
- 0
Hi,
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 realize 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
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 realize 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
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