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Old 03-01-2016, 07:51 PM
webslinger283 webslinger283 is offline
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Re: McLaren F1 Vehicle Dynamics

One cool place that i found some hidden information is contained in Driving Ambition, page 127. It is some hand written notes from Gordon Murray pertaining to targets for the vehicle. It had a target of:
wheel travel = +80 -90 F&R
Ride Frequency = 80/92 cpm
Roll Axis Centroid = roll center 60 mm a. ground @ F. 90 mm R.
Anti-Roll Bars= Front only
Roll Stiffness = 3 degrees per g lat
Anti-Dive = Yes (40-50%) investigate farb
Anti-Squat = ?
Damping = aluminum shocks[?] - ride ht adj?
velocity ratios = as near 1:1 as poss. (same F&R) + rising rate
Camber Change = 75% of body roll = 4.4 degrees for 80 mm travel
Wheel size = 18" dia x 8.5" F x 11.5" r
Tyre size = 245x40x18
Wheel base = 104" (2640)
Track = 1800 over tyres F&R [corrected to 1554]
Front Offset and Trail = Offset 14 mm @ gr, trail 30 mm
KPI = 10 degrees [corrected to 9 degrees]
Castor = 4 degrees
Static Camber = -45' F&R
Toe In = 3mm neg. F O F
Bump Steer = None
Center of pressure = 57% of wheel base
CD = .330
CL Front and Rear = .150 F .150 R (stable in yaw)
[something off the page] torsional stiffness = 10,000 ft lb/degree axle to axle min
Steering Wheel Diam = 13" dia
Unsprung Weight = 37 kg F 49 R
Frontal Area = 1.62 m^2
CDA = .535
Ground Clearance = 120mm
Ackermann Characteristics = 0-5 degrees / 0% 5-10 degrees / 35% 10-20 degrees / 80% -> 100% From [?] 25 degrees

I know some of that is contradictory to some other sources, like "Mclaren's Road Car an Autocar & Motor Book" claims the KPI is 8 degrees not 9, and the castor angle at 4.6 in lieu of 4. It also states that the ground level offset (the distance between the centre-line of the type and where the steering axis meets the ground) is 25 mm.

Unfortunately that is about all I can contribute at this time....hope it helps some.

Le Man I would be interested in that paper if you are willing to share. The engineering feat that is the McLaren F1 never ceases to amaze me.
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