AMuS did some in depth regarding the fuel flow meter, and RBR´s problems with it.
Quick and dirty translation of the important points:
- without restriction, cars would go up to 1500hp, and the engines would last for one lap
- the fuel flow meter is inside the tank
- the manufacturer Gill says they have a tolerance of .25%, which would be within the rules
- but being in the tank, those meters are within high vibrations and temperature, so there could be variations
- Merc was over the limit on Friday as well, got warned, and reduced to the FIA mandated rates
- RBR was over the limit on Friday
- due to the problems, FIA decided to reduce test frequency from ten times per second to five times per second for all teams (on Friday evening)
- the algorithm checks at 10500rpm, and compares all data over and under the limit. If those balance out, no alarm is raised
- after Fridays problems, RBR asked FIA for new meters. Those were fit into the car the night Friday to Saturday. Additionally, RBR changed the softwares engine maps.
- on Saturday, RBR was again over the limit, and had less power than Friday
- they say 40% of this power loss was due to the meters
- both the Friday and the Saturday used meters differed, from what readings RBR got from their own sensors
- they complained with FIA, and were allowed to build back to Fridays meters
- but of course those meters showed the same data they showed on Friday
- after this, FIA ordered them to go by that data, and ignore their own readings, like the other teams had to do as well (!)
- they warned RBR twice in qualifying
- the first race warning was given in lap five (!)
- Charlie Whiting: Had they reacted then, we wouldn´t have penalized them
- remaining questions:
-- Why didn´t RBR listen? Maybe they shed some light on this on their hearing.
-- Why is only RBR this bad off, and not the other Ren engine users? Is their car so much more vibrating, and/or getting hot?