Mclaren MCL40

A place to discuss the characteristics of the cars in Formula One, both current as well as historical. Laptimes, driver worshipping and team chatter do not belong here.
User avatar
AR3-GP
535
Joined: 06 Jul 2021, 01:22

Re: Mclaren MCL40

Post

The shape of the front wing trailing edge, and the shape of the sidepod inlet lower edge complement one another.

Image
Beware of T-Rex

User avatar
SilviuAgo
104
Joined: 15 Aug 2020, 16:08

Re: Mclaren MCL40

Post

MCL40 close-up:

Image

Image

Image

Image

Image

And an interesting video. Curious if more teams will go onto Alipin direction.


User avatar
AR3-GP
535
Joined: 06 Jul 2021, 01:22

Re: Mclaren MCL40

Post

In my opinion, one of the reasons that Mclaren has such an efficient cooling system is because they have focused a lot on isolating the cooling airflows from the engine bay. This way the air flowing through the ducts doesn't lose energy due to passing over rough surfaces and blockage like the engine, suspension components, wiring harnesses, and the exhaust.

In this picture, you can see the inner baffling (1) which isolates the sidepod radiator flows from the engine bay as it moves to the rear and out the back. You can also see a well-designed roll hoop duct (2) which allows the air to enter, pass through the radiator, and then remain contained inside of a channel that is bounded above by the engine cover, and sealed on the sides/below by the grommeting on the outer edge of the radiator. There's even an aero shroud inside the engine cover just to isolate the suspension arm (3) that is crossing into the cooling channel. This is how you get an extremely efficient cooling system that doesn't need much openings to pass a large mass flow of air.

Image

Mclaren has a Mercedes engine and has the exact same cooling requirements as the factory Mercedes team. Yet Mclaren can run smaller ducts. Why? Mclaren's well isolated internal duct system is more efficient. Therefore, they don't need large openings. In the following picture, you can see the suspension bell housings of the Mercedes looking into the engine bay from the back. The cooling air has to go through and over that mess before it comes out of the engine cover at the back. This creates a lot of flow energy losses. That means you don't get the same efficiency from the cooling system and have to run larger openings.

Image
Last edited by AR3-GP on 16 Feb 2026, 01:21, edited 1 time in total.
Beware of T-Rex

Brahmal
Brahmal
40
Joined: 19 Oct 2024, 05:07

Re: Mclaren MCL40

Post

AR3-GP wrote:
15 Feb 2026, 21:07
There's even an aero shroud inside the engine cover just to isolate the suspension arm (3) that is crossing into the cooling channel. This is how you get an extremely efficient cooling system that doesn't need much openings to pass a large mass flow of air.
One of the theories last year for why McLaren had such good rear tire temperature control was that they were diverting some of the internal air-flow through the suspension shrouds into the brake assembly. I wonder if this is what that would look like?

HungarianRacer
HungarianRacer
37
Joined: 25 Jun 2019, 12:26

Re: Mclaren MCL40

Post

AR3-GP wrote:
15 Feb 2026, 21:07
In my opinion, one of the reasons that Mclaren has such an efficient cooling system is because they have focused a lot on isolating the cooling airflows from the engine bay. This way the air flowing through the ducts doesn't lose energy due to passing over rough surfaces and blockage like the engine, suspension components, wiring harnesses, and the exhaust.

In this picture, you can see the inner baffling (1) which isolates the sidepod radiator flows from the engine bay as it moves to the rear and out the back. You can also see a well-designed roll hoop duct (2) which allows the air to enter, pass through the radiator, and then remain contained inside of a channel that is bounded above by the engine cover, and sealed on the sides/below by the grommeting on the outer edge of the radiator. There's even an aero shroud inside the engine cover just to isolate the suspension arm (3) that is crossing into the cooling channel. This is how you get an extremely efficient cooling system that doesn't need much openings to pass a large mass flow of air.

https://i.postimg.cc/3wY4R43m/image.png

Mclaren has a Mercedes engine and has the exact same cooling requirements as the factory Mercedes team. Yet Mclaren can run smaller ducts. Why? Mclaren's well isolated internal duct system is more efficient. Therefore, they don't need large openings. In the following picture, you can see the suspension bell housings of the Mercedes looking into the engine bay from the back. The cooling air has to go through and over that mess before it comes out of the engine cover at the back. This creates a lot of flow energy losses. That means you don't get the same efficiency from the cooling system and have to run larger openings.

https://i.postimg.cc/cJhhhthR/image.png
That's a bit of a biased assessment.... McLaren's rear heat exhaust is definitely larger (less flattering angle on the Merc image), their engine cover (center line) is not quiet as shrink-wrapped as the factory team's, the later also uses some sidepod volume to deliberately keep the wheel wake out longer, although it is true that Mercedes had to open up their car more for the Bahrain test.

Image

User avatar
AR3-GP
535
Joined: 06 Jul 2021, 01:22

Re: Mclaren MCL40

Post

HungarianRacer wrote:
16 Feb 2026, 01:58
AR3-GP wrote:
15 Feb 2026, 21:07
In my opinion, one of the reasons that Mclaren has such an efficient cooling system is because they have focused a lot on isolating the cooling airflows from the engine bay. This way the air flowing through the ducts doesn't lose energy due to passing over rough surfaces and blockage like the engine, suspension components, wiring harnesses, and the exhaust.

In this picture, you can see the inner baffling (1) which isolates the sidepod radiator flows from the engine bay as it moves to the rear and out the back. You can also see a well-designed roll hoop duct (2) which allows the air to enter, pass through the radiator, and then remain contained inside of a channel that is bounded above by the engine cover, and sealed on the sides/below by the grommeting on the outer edge of the radiator. There's even an aero shroud inside the engine cover just to isolate the suspension arm (3) that is crossing into the cooling channel. This is how you get an extremely efficient cooling system that doesn't need much openings to pass a large mass flow of air.

https://i.postimg.cc/3wY4R43m/image.png

Mclaren has a Mercedes engine and has the exact same cooling requirements as the factory Mercedes team. Yet Mclaren can run smaller ducts. Why? Mclaren's well isolated internal duct system is more efficient. Therefore, they don't need large openings. In the following picture, you can see the suspension bell housings of the Mercedes looking into the engine bay from the back. The cooling air has to go through and over that mess before it comes out of the engine cover at the back. This creates a lot of flow energy losses. That means you don't get the same efficiency from the cooling system and have to run larger openings.

https://i.postimg.cc/cJhhhthR/image.png
That's a bit of a biased assessment.... McLaren's rear heat exhaust is definitely larger (less flattering angle on the Merc image), their engine cover (center line) is not quiet as shrink-wrapped as the factory team's, the later also uses some sidepod volume to deliberately keep the wheel wake out longer, although it is true that Mercedes had to open up their car more for the Bahrain test.

https://i.postimg.cc/T3gd1FvB/ezgif-com ... ker(9).gif
Mclaren have fully isolated the engine bay from the cooling channels. You can't see anything inside from the back of the car. It makes their cooling system more efficient. That's why they run the least amount of openings of any team.

Image

Red bull and Mercedes are no match. You can see all of the engine bay through the opening in the back. The airflow has to pass over and through these rough surfaces and loses energy. That's why they have to open the rear of the car more and they lose more downforce as a result, especially at high altitude.

Image
Beware of T-Rex

User avatar
SilviuAgo
104
Joined: 15 Aug 2020, 16:08

Re: Mclaren MCL40

Post

McLaren have some beautifully detailed front floor vanes and wakeboard

Image

Image

Brahmal
Brahmal
40
Joined: 19 Oct 2024, 05:07

Re: Mclaren MCL40

Post


User avatar
Blackout
1579
Joined: 09 Feb 2010, 04:12

Re: Mclaren MCL40

Post

AR3-GP wrote:
15 Feb 2026, 21:07
In my opinion, one of the reasons that Mclaren has such an efficient cooling system is because they have focused a lot on isolating the cooling airflows from the engine bay. This way the air flowing through the ducts doesn't lose energy due to passing over rough surfaces and blockage like the engine, suspension components, wiring harnesses, and the exhaust.

In this picture, you can see the inner baffling (1) which isolates the sidepod radiator flows from the engine bay as it moves to the rear and out the back. You can also see a well-designed roll hoop duct (2) which allows the air to enter, pass through the radiator, and then remain contained inside of a channel that is bounded above by the engine cover, and sealed on the sides/below by the grommeting on the outer edge of the radiator. There's even an aero shroud inside the engine cover just to isolate the suspension arm (3) that is crossing into the cooling channel. This is how you get an extremely efficient cooling system that doesn't need much openings to pass a large mass flow of air.

https://i.postimg.cc/3wY4R43m/image.png

Mclaren has a Mercedes engine and has the exact same cooling requirements as the factory Mercedes team. Yet Mclaren can run smaller ducts. Why? Mclaren's well isolated internal duct system is more efficient. Therefore, they don't need large openings. In the following picture, you can see the suspension bell housings of the Mercedes looking into the engine bay from the back. The cooling air has to go through and over that mess before it comes out of the engine cover at the back. This creates a lot of flow energy losses. That means you don't get the same efficiency from the cooling system and have to run larger openings.

https://i.postimg.cc/cJhhhthR/image.png
Most teams used to do like Mclaren but it seems like some ditched those big streamlined internal aero shrouds.

But Mclaren was doing something interesting with the exit air of the lower centerline rads. (unless is that fairing just covering the suspension parts)
viewtopic.php?p=1306607#p1306607
.
Image

User avatar
SilviuAgo
104
Joined: 15 Aug 2020, 16:08

Re: Mclaren MCL40

Post

A nice look at the sidepods and bodywork of the McLaren, Mercedes, Ferrari and Williams.

Image

Image

Image

Image

User avatar
SilviuAgo
104
Joined: 15 Aug 2020, 16:08

Re: Mclaren MCL40

Post

Nice comparison for rake, but also for cooling options between McLaren, Aston and RedBull. McLaren did again an amazing job in this area.

Image

User avatar
organic
1141
Joined: 08 Jan 2022, 02:24
Location: Cambridge, UK

Re: Mclaren MCL40

Post

Nice view of the forward floor, and the shaping of their bib as it goes rearward.

Tobi Grüner

Image
Image

Andi76
Andi76
471
Joined: 03 Feb 2021, 20:19

Re: Mclaren MCL40

Post

Zynerji wrote:
12 Feb 2026, 18:09
Andi76 wrote:
12 Feb 2026, 03:23
Zynerji wrote:
12 Feb 2026, 02:05


Imagine the money spent to independently develop these diffusors, just for them to look so identical... 🤣🤣🤡

They really look Identical for you?
You missed the sarcasm, sir😉

Obviously :D

Macklaren
Macklaren
14
Joined: 23 Feb 2014, 16:26

Re: Mclaren MCL40

Post

Any changes to the car for this test? Surprised to see the giant aero rake setup out again

Emag
Emag
133
Joined: 11 Feb 2019, 14:56

Re: Mclaren MCL40

Post

Interesting flow patterns on the wheel hub.

Developer of F1InsightsHub