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Thread: [WRC] Arctic Rally 2021
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27th February 2021, 15:08 #811
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Mikkelsen is a good driver in a good car, no doubt in that. But at the moment, Lappi gives some "down to the Earth" perspective for him.
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27th February 2021, 15:10 #812
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This is a bit difficult because all scenarios are somewhat theoretical both mine and yours.
You are right that the important thing is torque on the wheels but that is why I give the example in speaking about power curve. Because the torque on the wheels x wheel speed is the same thing as the engine power minus mechanical losses, i.e. speaking about power curve simplifies things (when talking torque you anyway get from one power curve to another power curve but in a more complicated way).
You are also right that normally the teams will try to limit what they loose in the power band by using different gearing but they need a ballanced peformance, they need also certain top speed on straights, traction etc. In other words where one team can use shorter gearing to their advantage the other can do as well and keep their advantage (or put the advantage on top speed if needed).
Why it matters more on twisty stages (in my interpretation based also on long time observation) is because no matter how much time you push the throttle you always need to deliver biggest possible energy on the wheels in that period of time, i.e. largest possible graph area under the power curve. In twisty events it is physically impossible to keep the engine RPM tightly around the peak power and therefore car with flatter curve will always have advantage because between two gearshifting it always delivers more energy to the wheels.
The second reason why it matters more in lower speeds is traction because car with flatter curve has smoother delivery of the wheel torque (less raise or drop of torque).
IMHO this was very well illustrated in times when S2000 were the second category. They had very low torque compared to the turbo cars but reasonable power. They were able to keep within 1 s/km on very fast events (Finland for example) but the difference was around double on twistier mountain events (Acropolis for example) and even worse in muddy events (up to tripple sometimes).
You are right that normally the team with stronger engine may use advantage of the higher top speed but they also may opt for other options, for example higher downforce, hence why we can not know whose engine is more powerful just by looking on the onboards. We don't know how they ballanced the drag/downforce/power/torque/gearing/traction and how successful they were in their preparations.Last edited by Mirek; 27th February 2021 at 15:16.
Stupid is as stupid does. Forrest Gump
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27th February 2021, 15:11 #813
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Power is a lazy word probably, easier than to get into all that you guys mentioned. We generally mean power curve probably.
What I understand is Ford is the “slower” engine of the three and they have to compensate with a closer ratio gearbox, hence the slower top speed on some events. Also slower engine means they get to the same top speed but they take longer to do so.
I remember Warmbold talking about how his car was slower than the factory ones, but the main point here is we should use a radar gun on a certain point of the stage to better understand that. If the straight is long enough you will eventually get to the same speed with the same top gear ratio but take longer.
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27th February 2021, 15:14 #814
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27th February 2021, 15:18 #815
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27th February 2021, 15:22 #816
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miracles do happens - R5 streaming from stage 7
- Likes: cali (27th February 2021),Eli (27th February 2021),Japé (27th February 2021),Lead (27th February 2021),Mirek (27th February 2021),the sniper (27th February 2021)
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27th February 2021, 15:24 #817
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Stream from fixed camera's only, no commentators. I feel like I'm out there spectating
Only thing I miss is being able to help the poor Fabia driver to get out of the snow wall...
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27th February 2021, 15:33 #818
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27th February 2021, 15:43 #819
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I think it has something to do with the switch from using Stilo helmets and intercom, to using Bell helmets and intercom. Stilo has been in the intercom game for many years, while Bell has only recennty started to do their own intercom series. There is not much adjustment that can be done on the intercom system that would help pronounciation problems, but sound quality problems could certainly add to the problem of pronounciation.
/peter
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27th February 2021, 15:43 #820
Let's see who managed the tires the best in this last stage of the day.
toyota running pajari, msport's sponsor running sesks... im waiting on hyundai to run someone else too, since they pushed hard for keeping rally1s. need to have space for new guys. oli, lindholm,...
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