dallara F302, Руководство пользователя

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19
RIDE HEIGHT CHECK AND REFERENCES
• Ride height is fundamental for setting and changing the aerodynamic balance of the
car.
•
A lower car generally generates more down-force than a higher car.
•
A lower car improves performance as it features a lower centre of gravity.
•
The easiest way to measure ride heights is checking the FR and RR distances
between the floor wood and the set-up floor, preferably with the driver on board
and tyres at hot tyre pressure. This is the only method which takes into account
the ride height changes caused by wear on the floor wood.
It might sometimes be difficult to measure ride heights directly, so we also provide alternative
references.
The
example shows front ride height 15mm and rear 30mm (at wheel axis).
With 2675mm wheelbase, this gives 0.32 ° pitch angle. [(30 – 15) / 2675] x 57.29 = 0.32°
At the front end of the car you have two alternative references:
•
Two round platforms 513.5mm from car bottom, on top of the tub at the wheel axle line.
You can measure their distance from the ground as 528.5-513.5 = 15 mm ride height
• A flat surface (skid) about 310 mm behind the wheel axis and 40 mm behind the skid
leading edge. Measure its distance from ground as 16.7 - (tan0.32°*310)= 15 mm
At the rear end of the car you have two alternative references:
•
Two machined areas, at 328.5 mm from car bottom, on the gearbox at wheel axle line.
You can measure their distance from the ground as 358.5 – 328.5 = 30 mm height
•
Under the flat bottom, about 310 mm ahead of rear wheel axis and 50mm ahead of the
start of the diffuser. Measure and calculate its distance from ground as
(tan0.32° *310) + 28 (measured)=
30 mm height
REAR RIDE HEIGHT FRONT RIDE HEIGHT
30mm 15mm