Dallara Automobili – GP2 user manual
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STEERING ASSEMBLY
Pinion primitive diameter [ mm ]
11.75
Static steering ratio
14.0 steering wheel/wheel
CASTOR
When the car is flat ( front and rear ride height are identical ) and the front upright inclination is
0.00° [APPARENT CASTOR ] the effective castor angle is 5.80° [ BUILT-IN CASTOR ].
With different front to rear ride heights, castor angle changes because of the pitch angle of the car.
For instance, with 20 mm front and 40mm rear ride heights, measured at wheel axis, (wheelbase
is 3120 mm) the pitch angle is 0.367° and castor angles (both apparent and total) are reduced.
Pitch angle :
[(40-20)/3120]
•
57.296 = 0,367°
Total Castor angle :
5.80° - 0,367° = 5.432°
Apparent Castor angle :
0,00° - 0,367° = -0,367°
MAXIMUN CASTOR
