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Chassis/Body Roll Inertia values

Chassis/Body Roll Inertia values

Chassis/Body Roll Inertia values


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?


RE: Chassis/Body Roll Inertia values

    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


Greg Locock

RE: Chassis/Body Roll Inertia values

Thanks for that Greg.


RE: Chassis/Body Roll Inertia values

SAE paper # 1999-01-1336.

RE: Chassis/Body Roll Inertia values

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

Other publications from SAE International (www.sae.org) that may be of interest are:

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

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.

Best regards,

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

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