Vodafone McLaren MP4-27 Mercedes

[simieski]

edit: the flow slows down through the tunnel

Would this not be the expected result? The sides of the tunnel will create a large surface area which will create a large amount of boundary layer interaction slowing the air down significantly.

[N12ck]

whats interesting is it follows the coke bottle then rapidly changes direction towards the outer edges of the diffuser, exactley where you want the exhaust gases

[simos]

whats interesting is it follows the coke bottle then rapidly changes direction towards the outer edges of the diffuser, exactley where you want the exhaust gases

Under normal circumstances with 2012 exhaust positioning that would push exhaust gases away (probably up) and would be a bad idea. But they can combine it with double floor Red Bull trick, and keep tunneled air under the floor separated from exhaust.

I'm more interested in another option. A variation of regular 2011 U sidepods used to channel air over exhaust position to push exhaust gasses down over diffuser.

[N12ck]

Possibly my tunnel isnt long enough, I will try a longer tunnel

[Huntresa]

Possibly my tunnel isnt long enough, I will try a longer tunnel

Plz try if you can to add a duct similair to the red bull one that leads the air to the motor starter hole, after the tunnel or inside the tunnel at the end.

Edit: If its hard to understand or visulize what i mean, i think of the U-Tunnel as it not having an open end, that it feeds air into a duct that starts inside the tunnel at the very end of what would be the wall of the cutout under the mclaren exhaust on the current car setup, and that duct would then be above the floor at the end much like RB has and lead to the start motor hole.

Do you understand what i mean by that ?

[N12ck]

Possibly my tunnel isnt long enough, I will try a longer tunnel

Plz try if you can to add a duct similair to the red bull one that leads the air to the motor starter hole, after the tunnel or inside the tunnel at the end.

I will do tomorrow, but at the moment, I am getting my head round the current solution, I am trying to do all this before we see McLaren's new bodywork so we can know its effects without guessing, 'it may do this or that'

[FrukostScones]

So the "no sidepods as such" car arrives for the German GP? ..... maybe the change is only so minor that you will barely notice it (like with Mercedes W03)..... But according to Andrew Benson of BBC Martin Whitmarsh said they will be "quite different" .....hoolahoop

[amc]

I've been wondering why teams haven't done something like this before. However, here it seems is the answer:

Any vertical cross section of bodywork normal to the car centre line situated in the volumes defined below must form one tangent continuous curve on its external surface. This tangent continuous curve may not contain any radius less than 75mm:

a) The volume between 50mm forward of the rear wheel centre line and 300mm rearward of the rear face of the cockpit entry template, which is more than 25mm from the car centre line and more than 100mm above the reference plane.
b) The volume between 300mm rearward of the rear face of the cockpit entry template and the rear face of the cockpit entry template, which is more than 125mm from the car centre line and more than 100mm above the reference plane.

Since I think a fully enclosed tunnel's sides count as external surfaces, a tunnel like this is limited to 50mm in height - surely too small to be effective as Red Bull found with their V1 and V2 tunnels.

It could be done, sure, but it would not be effective in my opinion.

The shape will revert to something far more like the Red Bull or Ferrari I think. It is more likely to be the Red Bull because of the Ferrari's odd radiator layout etc. which has all been done with their exhaust in mind.

[PhillipM]

Well, it's still guessing, as we don't know what the bodywork is

It could just be a massive repackaging for small pods for all we know atm

[N12ck]

Well, it's still guessing, as we don't know what the bodywork is

It could just be a massive repackaging for small pods for all we know atm

true but we can know the effects of the upside down L pods, so everyone is happy!

[beelsebob]

I've been wondering why teams haven't done something like this before. However, here it seems is the answer:

Any vertical cross section of bodywork normal to the car centre line situated in the volumes defined below must form one tangent continuous curve on its external surface. This tangent continuous curve may not contain any radius less than 75mm:

a) The volume between 50mm forward of the rear wheel centre line and 300mm rearward of the rear face of the cockpit entry template, which is more than 25mm from the car centre line and more than 100mm above the reference plane.
b) The volume between 300mm rearward of the rear face of the cockpit entry template and the rear face of the cockpit entry template, which is more than 125mm from the car centre line and more than 100mm above the reference plane.

Since I think a fully enclosed tunnel's sides count as external surfaces, a tunnel like this is limited to 50mm in height - surely too small to be effective as Red Bull found with their V1 and V2 tunnels.

It could be done, sure, but it would not be effective in my opinion.

The shape will revert to something far more like the Red Bull or Ferrari I think. It is more likely to be the Red Bull because of the Ferrari's odd radiator layout etc. which has all been done with their exhaust in mind.

Not a problem to avoid really – just twist it around so that the cross section joins up at other front or back. Or... just put it in the bottom 100-125mm, 10cm is more than enough space to get a nice big tunnel.

[N12ck]

the flow exiting the tunnel is very turbulent from flow simulations I am loading some images up later tonight

[NoDivergence]

That will be greatly appreciated, what if you put a fin to control the flow a bit more within the tunnel?

[PhillipM]

Well, just heard a rumour from someone that it involves new radiators/duct packaging, not sure how reliable that info is though as it's secondhand.

[PlatinumZealot]

They will be bringing "special" updates to ensure Hamilton victory for his 200th GP.

When did he sprout another 100? Did he inherit them somewhere?

No he's right... Mclaren will be bring the stepped nose/ raised chassis in another 100 races...

Ah.. Very good. You saw it! =D> I always cover my tracks.