Chassis/Body Roll Inertia values

[RaceEngJr]

Hi,

Im after a more accurate roll inertia value for medium sized sedan style cars (around the 1200 - 1600kg mark). I have a value for formula style cars at 140 kg.m^2 (3300lb.ft^2) although im guessing this is much too low to apply to road cars. Anyone have any more accurate ball park figuers?

Jake

 

[GregLocock]

Total weight N 16.09E+03
Front ground reaction N 9070.49
Rear ground reaction N 7023.69

Total roll inertia Kg mm**2 550.4E+06
Total pitch inertia Kg mm**2 3.617E+09
Total yaw inertia Kg mm**2 3.532E+09

Total product Ixy Kg mm**2 -1.005E+06
Total product Ixz Kg mm**2 -30.32E+06
Total product Iyz Kg mm**2 4.843E+06

for an anonymous car

Cheers

Greg Locock

 

[RaceEngJr]

Thanks for that Greg.

Jake

 

[hpfreak]

SAE paper # 1999-01-1336.

 

[mloew]

Indeed! This paper is in the public domain. Here is the information:

SAE 1999-01-1336 Measured Vehicle Inertial Parameters - NHTSA's Data through November 1998
Gary J. Heydinger - Sea Inc., W. Riley Garrott - NHTSA

http://www-nrd.nhtsa.dot.gov/vrtc/ca/capubs/sae1999-01-1336.pdf

Other publications from SAE International (

http://www.sae.org)

that may be of interest are:

2001-01-0475 Test Method for Simulating Vehicle Rollover
Mike Rossey - Autoliv

http://www.sae.org/servlets/productDetail?PROD_TYP=PAPER&PROD_CD=2001-01-0475

2003-01-0966 Estimation of Passenger Vehicle Inertial Properties and Their Effect on Stability and Handling
R. Wade Allen ,David H. Klyde, Theodore J. Rosenthal; Systems Technology Inc.

http://www.sae.org/servlets/productDetail?PROD_TYP=PAPER&PROD_CD=2003-01-0966

Best regards,

Matthew Ian Loew
"Luck is the residue of design."
Branch Rickey

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