marcush. wrote:the story says the Coanda exhaust feature considerably smaller diameters to speed up the flow at lower revs to achieve a broader range of the exhaust working as an aero help-at the expense of a fair amount of top end power.
If you stick on a this much different exhaust to your engine ..I´d assume the map for the big endpipe diameter map is very different to the small diameter map.
Why Mercedes are struggling
That's because they have developed themselves in a direction to go slower, all because they have been trying to get more consistency from the rear tyres to help race performance. And that is linked to the 'double DRS'.
HOW HAVE MERCEDES TRIED TO FIX IT?
To solve that rear tyre wear problem, since the Canadian Grand Prix in mid-June Mercedes have removed quite a lot of the downforce-producing devices on the front wing and are never running anywhere near maximum front wing angle.
That reduces the amount of front grip. They've probably lost something like 50-60kg of front downforce so they are running the centre of aerodynamic pressure much further rearward.
The benefit of that is that it will balance the car better so tyre degradation will reduce. But it comes at the cost of a slower overall pace. So the car feels better to drive, but is slower.
HOW CAN MERCEDES SOLVE THE PROBLEM?
Mercedes have a very conventional rear-end aerodynamic treatment and are not trying to exploit the exhaust gases for aerodynamic effect in the way McLaren, Ferrari and Red Bull are.
There is 0.2-0.3 seconds a lap in trying to do that - all produced from greater rear-end grip.
So if Mercedes want to improve, they would be better advised to build that kind of exhaust system. That would give them better rear-end grip, which would enable them to put the front downforce back on without suffering the rear instability they had earlier in the year.
If I was them, I would be thinking very seriously about getting rid of the 'double DRS', unless I was absolutely on top of which circuits it will provide a benefit at and which it will create a deficit.
godlameroso wrote:The Mercedes is a very good car, especially above 200kph, unfortunately there aren't many turns in F1 that are above that speed. In Spa, there is only Eau Rouge, Pouhon and Blanchimont. The turns where the downforce is inconsistent are in the 140-190kph range, precisely the speed where most F1 turns occur. Below that the Merc's mechanical grip is as good as anyone else's.
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