"Running out of fuel"

[langwadt]

As much as I hate what if questions but...

Due to reliability issues this year and points down to tenth, a car on its last lap is running 10th and the last car running. Half way through the last lap the fuel used during the race equals 100 litres. Do you stop the car and still get tenth or use more than 100 litres and be disqualified?

I would expect something similar to the current qualifying rules; if a car stops on track they estimate the fuel needed to complete the in lap and if that is less than what is in the tank plus the 1 liter sample the car is disqualified

[Cuky]

As much as I hate what if questions but...

Due to reliability issues this year and points down to tenth, a car on its last lap is running 10th and the last car running. Half way through the last lap the fuel used during the race equals 100 litres. Do you stop the car and still get tenth or use more than 100 litres and be disqualified?

You can't start with more than 100litres so you couldn't use more than that

[rscsr]

They are allowed to do so because warmup lap and in lap and sample

[Just_a_fan]

As much as I hate what if questions but...

Due to reliability issues this year and points down to tenth, a car on its last lap is running 10th and the last car running. Half way through the last lap the fuel used during the race equals 100 litres. Do you stop the car and still get tenth or use more than 100 litres and be disqualified?

You would stop and get tenth on count back.

[rjsa]

As much as I hate what if questions but...

Due to reliability issues this year and points down to tenth, a car on its last lap is running 10th and the last car running. Half way through the last lap the fuel used during the race equals 100 litres. Do you stop the car and still get tenth or use more than 100 litres and be disqualified?

You can't start with more than 100litres so you couldn't use more than that

Yes you can carry more, you are not allowed to use more than 100 litres, as per accounted by the flow meter and the ECU.

[turbof1]

As much as I hate what if questions but...

Due to reliability issues this year and points down to tenth, a car on its last lap is running 10th and the last car running. Half way through the last lap the fuel used during the race equals 100 litres. Do you stop the car and still get tenth or use more than 100 litres and be disqualified?

You can't start with more than 100litres so you couldn't use more than that

Not only can you, you have to. There's an installation lap (getting to the grid), a formation lap, an inlap and fuel sample all next to the race. The 100kg only counts from start to finish.

And that's a little bit of an issue. Previously you could play it a bit safe and fuel up a bit more. But with 100kg it'll be more difficult. If parameters that have influence on fuel consumption suddenly change during the race, say headwind turns, it could become a dire situation.

[Juzh]

In theory, we could see a situation in which cars have used more than 100 kg of fuel before crossing the finish line and yet they'd still be going physically. The obvious consequence would be a DQ after the race.

I understand that the Gill sensor is not a auto cut off so if a car consumes more than 100 kgs for the race distance then the car should be disqualified by the FIA. But question is what will be the limit of the allowance as all devices will have a tolerance limit to it. In case it is 1% does it mean that all cars can use 101 kgs or 100 kgs to be classified for a result?

There was a big deal some months ago when it was discovered that flow sensor is actually incorrect up to 1% and could potentially allow someone to burn up 101 kilos unnoticed. It could of course also work the other way around and logged 101 kilos used when in fact you used only 100. I presume it will a talking point come start of the season if the problem is not yet fixed.

[GSBellew]

Seeing as the original plan was for the cars to use electric power only in the pits & they seemingly are still capable of this even though it's no longer a requirement is there anything to stop a driver switching the engine off after crossing the line and driving the in lap under electric power only?

I know they are restricted to 33 seconds a lap, but would that restriction still apply after the end of the race?

[turbof1]

Seeing as the original plan was for the cars to use electric power only in the pits & they seemingly are still capable of this even though it's no longer a requirement is there anything to stop a driver switching the engine off after crossing the line and driving the in lap under electric power only?

I know they are restricted to 33 seconds a lap, but would that restriction still apply after the end of the race?

*33 seconds on full power; they are allowed to use less power over more seconds.

I don't think these rules apply after the race, but also I don't think they cross the finish line with enough harvested energy to cover the inlap.

[langwadt]

Seeing as the original plan was for the cars to use electric power only in the pits & they seemingly are still capable of this even though it's no longer a requirement is there anything to stop a driver switching the engine off after crossing the line and driving the in lap under electric power only?

I know they are restricted to 33 seconds a lap, but would that restriction still apply after the end of the race?

they are not restricted to 33 seconds, they are restricted to 4MJ/lap from the ES

lets see, 4MJ/36MJ/L ~= 0.1Liter, lets say electric is 100% efficient, gas 33% , so ~0.3L for ~3.5Km lap
so they'd have to average ~12km/L to make a lap on 4MJ, I'm not sure they could do that

but in the end energy can come from only one place, the fuel. What ever is in the ES was made by burning fuel earlier

[notsofast]

You can all see where this is going. Instead of managing the tires, the drivers will be managing fuel.

[wuzak]

Seeing as the original plan was for the cars to use electric power only in the pits & they seemingly are still capable of this even though it's no longer a requirement is there anything to stop a driver switching the engine off after crossing the line and driving the in lap under electric power only?

I know they are restricted to 33 seconds a lap, but would that restriction still apply after the end of the race?

*33 seconds on full power; they are allowed to use less power over more seconds.

I don't think these rules apply after the race, but also I don't think they cross the finish line with enough harvested energy to cover the inlap.

They don't need the harvested energy to do the in-lap.

The 100kg fuel limit only counts for lights to flag. They can carry extra for the warm-up lap and for the cool-down/in lap.

[dragosmp]

they are not restricted to 33 seconds, they are restricted to 4MJ/lap from the ES

True, I don't know why some keep insisting you can only use the K for 33 seconds, it can be used the whole lap as long as the H supplies anything that goes over 4MJ.

That said, I don't think the 4MJ restriction is enforced in the in-lap, but I can't imagine one would have the battery necessarily full @4MJ after the last lap.

Let's say they have all the 4MJ available. A lap at full race speed is about 80s; if they're on electric only it means they're @160HP in stead of 750HP, so let's say the lap lasts 200s. If 4MJ were to last 200s the K would need to work @20kW average w/100% efficiency and I'm not sure this is enough to power the car, beat the drag of the ICE and assure the working of the pumps and electronics.

[turbof1]

Seeing as the original plan was for the cars to use electric power only in the pits & they seemingly are still capable of this even though it's no longer a requirement is there anything to stop a driver switching the engine off after crossing the line and driving the in lap under electric power only?

I know they are restricted to 33 seconds a lap, but would that restriction still apply after the end of the race?

*33 seconds on full power; they are allowed to use less power over more seconds.

I don't think these rules apply after the race, but also I don't think they cross the finish line with enough harvested energy to cover the inlap.

They don't need the harvested energy to do the in-lap.

The 100kg fuel limit only counts for lights to flag. They can carry extra for the warm-up lap and for the cool-down/in lap.

It is still a benefit though if they can run on the harvested energy only. Then they don't need to carry that extra fuel on board. That could be around a tenth each lap.

[tim|away]

For comparison:

Tesla Model S
Weight = 4,647 lbs = 2,108 kg

EPA rated Highway fuel economy:
97 mpg-e = 0.21497 kwh/km
0.21497 kwh/km = 0.773892 MJ/km

Range with 4 MJ:
4MJ / 0.773892MJ/km = 5.12 km

With 4 MJ you achieve a range of more than 5km on the highway with a Tesla Model S that weighs 2,108 kg. Having said that, I'm sure that an F1 car could in theory (!) drive a whole inlap slowly without the use of the ICE. This assumes that the car actually has 4MJ of ES and is fully charged. I however highly doubt that we'll see that, as it won't be practical for a lot of different reasons.