godlameroso wrote: ↑
Wed Nov 10, 2021 7:14 pm
8mm is 1/3 of an inch, while not a huge amount it is not insignificant.
Thats this years rules, next years are more stringent.
https://www.fia.com/sites/default/files ... -10-15.pdf
3.15.6 Front Floor Flexibility
Bodywork flexibility will be tested by applying a load vertically upwards using a 50mm
diameter pad with a gimbled interface to the loadcell. The position of the centre of the pad
will be given by the FIA and will be on the underside of the plank within a quadrilateral area,
with vertices at points [XF=460, 50], [XF=610, 65], [XF=610, -65], [XF=460, -50]. The deflection
will be measured along the loading axis.
At all times during the test, the load at a given deflection must exceed the load given by a
straight-line graph defined by connecting the following coordinates in order: (0 mm, 0 N) (1
mm, 0 N) (5 mm, 4000N) (25mm, 6000N). This must be the case whether the deflection is
increasing, decreasing, or held constant. The test will have no more than a maximum load of
8000N or a maximum deflection of 15mm (whichever is reached first) unless specifically
requested by the FIA to investigate behaviour above these limits.
The load deflection relationship must be strictly monotonic with both increasing and
3.15.7 Outboard Floor Flexibility
a. Bodywork may deflect no more than 5mm vertically when a [0, 0, -500]N load is
applied to it at XR=-450 and Y= ±450. The load will be applied using a 50mm diameter
ram and an adaptor of the same size. Teams must supply the latter when such a test is
b. Bodywork may deflect no more than 20mm vertically when a [0, 0, 500]N load is
applied to it at points [XR, Y] [-450, ±600] or [-1300, ±670]. The load will be applied
using a 50mm diameter ram and an adaptor of the same size in an upwards or
downwards direction. Teams must supply the latter when such a test is deemed
3.15.8 Central Floor Flexibility
a. Bodywork within RV-PLANK may deflect no more than 1mm at the two holes in the
plank at XF=1080 and no more than 2mm at the rearmost hole, when the car, without
driver, is supported at these positions. The car will be supported on 70mm diameter
pads, centred on the holes, and only in contact with the underside of the plank
assembly. The displacement will be measured at the supports, relative to the
reference plane at the centre of each hole. Furthermore, there may be up to 1mm
additional deflection at the forward positions provided it complies with Article 3.15.2.
b. Bodywork on the reference plane may deflect no more than 0.2mm when the car,
without driver, is supported at the two holes in the plank at XF=1080 and at the
rearmost hole in the plank. The car will be supported on 40mm diameter pads,
centred on the holes, and only contacting the bodywork on the reference plane. For
the two holes at XF=1080 the displacement will be measured at the supports, relative
to the survival cell datum points detailed in Article 3.2.6. For the rearmost hole the
displacement will be measured at the support, relative to the power unit at the
uppermost transmission mounting studs detailed in Article 5.4.8.
Also if a floor flexed anywhere close to as much as the rules allowed, the car would be next to impossible to drive. The flutter it would have would lead to a lot of downforce instability, as you would run the risk of stalling the floor.