Slipstream a thing?

[DrunkenTee]

^ Yes or no?

I been googling and looking around for this for a bit and couldn't find anything, and as Im watching the SRO Esports race right now, where some of the drivers ignored slipstream on the long straight behind Eau Rouge at Spa I just wondered if slipstream is actually a thing in ACC.. and is there any timeframe about how far it works? As for example in Gran Turismo Sport, slipstream is a thing at below 0.750s time so you get tow

Would love to have a good answer to my question!

[EF_Neo1st]

Yes, it is, not so big but it is.
At Paul Ricard I can get some extra Km/h on the top speed some 200m before the turn there because of slipstream if under 1s from car in front.

[DrunkenTee]

Originally posted by EF_Neo1st:

Yes, it is, not so big but it is.
At Paul Ricard I can get some extra Km/h on the top speed some 200m before the turn there because of slipstream if under 1s from car in front.

Alright, ty!

[Abu Jaber drives Simucube 2 Pro]

Ye sometimes it doesnt feel very powerful as you can see in F1 per exemple, i wonder how it is IRL

[Mahjik]

Originally posted by Abu Jaber drives XK V8 5.0:

Ye sometimes it doesnt feel very powerful as you can see in F1 per exemple, i wonder how it is IRL

It varies per car. In F1, the cars are very aero sensitive. With that, the slipstream provides a good benefit. However, in NASCAR, the slipstream is a huge benefit there as well but for a different reason. The cars have a large frontal square area so they punch a large hole in the air. In short, aerodynamics are pretty complicated but GT3 cars for various reasons do not have have has much benefit from slipstream as some other types of racing cars.

[PhilP01]

I was wondering the same thing and watched this IRL onboard today: https://youtu.be/EiaTasnUEng

Start watching at about 4:45 where soon after he hits the long straight a short distance behind another car. Seems like the slipstream is not as pronounced as in F1.

[imJGott]

like everyone said, its not as powerful as you may think. it does exist in the game but some cars definitely overtake some vehicles better than others. for example, i main the RCF and if i slipstream a porsche i can overtake on the straight with easy. why? the porsche doesnt have straight line power compared to the rcf and a few other vehicles. if i try the same slipstream on the BMW or bentley the likelihood of me overtaking is a bit harder and may not happen. why? those vehicles shine on the straight from their raw power.

[grizta30]

Originally posted by imJGott:

like everyone said, its not as powerful as you may think. it does exist in the game but some cars definitely overtake some vehicles better than others. for example, i main the RCF and if i slipstream a porsche i can overtake on the straight with easy. why? the porsche doesnt have straight line power compared to the rcf and a few other vehicles. if i try the same slipstream on the BMW or bentley the likelihood of me overtaking is a bit harder and may not happen. why? those vehicles shine on the straight from their raw power.

Yeah the Beemer is a pig to get past on the straights, my main is the Audi, it seems the BMW straight line speed cancels out the tow.

[Trezoitao38]

Originally posted by Mahjik:

Originally posted by Abu Jaber drives XK V8 5.0:

Ye sometimes it doesnt feel very powerful as you can see in F1 per exemple, i wonder how it is IRL

It varies per car. In F1, the cars are very aero sensitive. With that, the slipstream provides a good benefit. However, in NASCAR, the slipstream is a huge benefit there as well but for a different reason. The cars have a large frontal square area so they punch a large hole in the air. In short, aerodynamics are pretty complicated but GT3 cars for various reasons do not have have has much benefit from slipstream as some other types of racing cars.

Low top speed.

Drafting is a thing in Nascar because cars move faster than 250 km/h for most of the time at speedways and ahead 300 km/h at superspeedways. GT3 cars are slower most of the time, reach 250 km/h only at the final of the straights.

[Mahjik]

Originally posted by Trezoitao38:

Originally posted by Mahjik:

It varies per car. In F1, the cars are very aero sensitive. With that, the slipstream provides a good benefit. However, in NASCAR, the slipstream is a huge benefit there as well but for a different reason. The cars have a large frontal square area so they punch a large hole in the air. In short, aerodynamics are pretty complicated but GT3 cars for various reasons do not have have has much benefit from slipstream as some other types of racing cars.

Low top speed.

Drafting is a thing in Nascar because cars move faster than 250 km/h for most of the time at speedways and ahead 300 km/h at superspeedways. GT3 cars are slower most of the time, reach 250 km/h only at the final of the straights.

It's not about the top speed. It's much more complicated than that.

[Trezoitao38]

Ok, If you want to believe drafting is not related with speed, It os up to you.

[Dan]

Originally posted by Mahjik:

Originally posted by Trezoitao38:

Low top speed.

Drafting is a thing in Nascar because cars move faster than 250 km/h for most of the time at speedways and ahead 300 km/h at superspeedways. GT3 cars are slower most of the time, reach 250 km/h only at the final of the straights.

It's not about the top speed. It's much more complicated than that.

It's predominantly about top speed. That term is squared, so drag *exponentially* increases with speed. It's also a function of area (geometry - the complicated part) and density (for racing purposes, how far above sea-level the track is located).

...But mainly speed.

[Mahjik]

Originally posted by Trezoitao38:

Ok, If you want to believe drafting is not related with speed, It os up to you.

Related yes. Solely reliant upon, no. However if you think you need to be above 150mph to create a draft, you've obviously never seen a Spec Miata race.

[Dan]

Originally posted by Mahjik:

Originally posted by Trezoitao38:

Ok, If you want to believe drafting is not related with speed, It os up to you.

Related yes. Solely reliant upon, no. However if you think you need to be above 150mph to create a draft, you've obviously never seen a Spec Miata race.

Who said it was solely reliant upon, and that you need to be going above a certain speed to create a draft?
The point made was that the draft effect increases significantly with speed, and that's absolutely the biggest contributing factor.
That's why getting a tow at Monza will usually be a more significant advantage than at other, slower road circuits for example.

[Mahjik]

Originally posted by Grimdanfango:

Originally posted by Mahjik:

Related yes. Solely reliant upon, no. However if you think you need to be above 150mph to create a draft, you've obviously never seen a Spec Miata race.

Who said it was solely reliant upon, and that you need to be going above a certain speed to create a draft?
The point made was that the draft effect increases significantly with speed, and that's absolutely the biggest contributing factor.
That's why getting a tow at Monza will usually be a more significant advantage than at other, slower road circuits for example.

Again, that's not really the point as it's not about speed.

When going down a straight, drag is your enemy as you have no use for it. It only slows the car down. However, in a corner, drag (i.e. aero like wings) depending on the car type helps the car. This is what F1 calls "dirty air". If the car is aero dependent, like more single seaters, being close to a car in corners hurts their grip. Prototypes are similar. With that, when driving on a track with long straights, you have more track to use drafting more effectively. Speed is a component, but it's no more less or more equal to the sum of other characteristics which effects why one car has a better or lesser benefit of drafting.

This is why I used Spec Miata for a example. Those are not getting up to 250 km/h, but they do highly benefit from drafting on tracks with long straights. As mentioned above, tracks with more turns than straights make a draft less effective but not because of the speeds.

You obviously have to go fast enough for aero forces to be in play, but it's a lot lower than people think (i.e. take a look at the crazy aero of some of the top auto-x cars in the non-street divisions).

[Trezoitao38]

Ok, now explain why drafting is a thing at Daytona and not at Martinsville.