1999 Nissan R391 LMP

 
Reference: wind tunnel data
Medium downforce configuration:

Map average:

Downforce:
2030 lbs. @ 150 mph, with 658 lbs. of drag
2923 lbs. @ 180 mph, with 948 lbs. of drag
3609 lbs. @ 200 mph, with 1170 lbs. of drag

Lift-to-drag ratio: 3.09:1 
Map average balance: 43.6%

Single ride height point, peak downforce: FRH: 37.5 mm RRH: 65 mm:

Downforce:
2162 lbs. @ 150 mph, with 697 lbs. of drag
3113 lbs. @ 180 mph, with 1004 lbs. of drag
3844 lbs. @ 200 mph, with 1239 lbs. of drag

Lift-to-drag ratio: 3.10:1 
Balance: 43.4%

A Low downforce configuration (Paul Ricard):

Map average:

Downforce:
1509 lbs. @ 150 mph, with 576 lbs. of drag
2173 lbs. @ 180 mph, with 829 lbs. of drag
2683 lbs. @ 200 mph, with 1024 lbs. of drag

Lift-to-drag ratio: 2.62:1
Map average balance: 42.8%

Single ride height point, peak downforce: FRH: 30 mm RRH: 50 mm:

Downforce:
1760 lbs. @ 150 mph, with 593 lbs. of drag
2534 lbs. @ 180 mph, with 854 lbs. of drag
3129 lbs. @ 200 mph, with 1054 lbs. of drag

Lift-to-drag ratio: 2.97:1
Map average balance: 44.9%

Single ride height point, minimum drag: FRH: 20 mm RRH: 20 mm:

Downforce:
1359 lbs. @ 150 mph, with 536 lbs. of drag
1957 lbs. @ 180 mph, with 772 lbs. of drag
2416 lbs. @ 200 mph, with 953 lbs. of drag

Lift-to-drag ratio: 2.54:1
Balance: 44.6%

Extra low downforce (extra low drag) configuration:

Map average:

Downforce: 
1257 lbs. @ 150 mph, with 532 lbs. of drag
1810 lbs. @ 180 mph, with 766 lbs. of drag
2235 lbs. @ 200 mph, with 946 lbs. of drag

Lift-to-drag ratio: 2.36:1
Map average balance: 45.3%

Single ride height point, minimum drag: FRH: 20 mm RRH: 20 mm:

Downforce:
1082 lbs. @ 150 mph, with 496 lbs. of drag
1558 lbs. @ 180 mph, with 714 lbs. of drag
1924 lbs. @ 200 mph, with 882 lbs. of drag

Lift-to-drag ratio: 2.18:1
Balance: 55.4%


ęCopyright 2013, Michael J. Fuller