Mclaren MP4-30 Honda

[mclaren111]

Formula Update:

Finally, McLaren have added three gurney flaps to the leading edge of the diffuser. By creating a low-pressure drag area behind the flap, it increases the effectiveness of the wing because low pressure pulls high pressure towards it. This means that for a specific drag trade-off you gain more downforce from the wing, by slotting the elements on a gurney you could perhaps increase the net pressure gain.

Furthermore, McLaren could also be using a slat method of retrieving downforce. You can allow the diffuser to operate at a higher angle of attack without inducing wing stall, which means you can curve the diffuser side walls more aggressively for increased expansion of air flow. This should also see the rear end of the MP4-30 more planted and stable.

Any pictures anyone

[Jef Patat]

Yes, check my post on the previous page
And now go clean up that drool

[mclaren111]

The article stated it is new for this race which is incorrect

They raced it in Britain already - hence my incorrect assumption

[JDC123]

McLaren have added three gurney flaps to the leading edge of the diffuser

I only see two gurney flaps from the picture on the previous page

[GoranF1]

Honda is 120hp down on Mercedes!
http://www.inautonews.com/boullier-not- ... sting-cuts

[Silent Storm]

Honda is 120hp down on Mercedes!
http://www.inautonews.com/boullier-not- ... sting-cuts

Today Kimi lost his MGU-K which mean loss of 160hp and he was lapping 2 seconds slower than Vettel. So how slow was Mclaren today compared to Lewis and Ferrari. Maybe you can add 1.5 seconds to that and you will get what Mclaren's pace would be with a good PU I guess.

[GoranF1]

Honda is 120hp down on Mercedes!
http://www.inautonews.com/boullier-not- ... sting-cuts

Today Kimi lost his MGU-K which mean loss of 160hp and he was lapping 2 seconds slower than Vettel. So how slow was Mclaren today compared to Lewis and Ferrari. Maybe you can add 1.5 seconds to that and you will get what Mclaren's pace would be with a good PU I guess.

In race pace that's about it 1.5......in Q its closer to 2 seconds

[GoranF1]

@Silent storm
I am having a hard time beliving 160Hp is only wort 2 seconds....what were the condition of Vettel vs Kimi tires at the time,did Kimi had 0 KERS....?
In Mclaren case its not only about 120hp its also about "snowball" efect Button was talking about(tyres operating window,levels of DF etc.)

[dr_cooke]

Honda is 120hp down on Mercedes!
http://www.inautonews.com/boullier-not- ... sting-cuts

Today Kimi lost his MGU-K which mean loss of 160hp and he was lapping 2 seconds slower than Vettel. So how slow was Mclaren today compared to Lewis and Ferrari. Maybe you can add 1.5 seconds to that and you will get what Mclaren's pace would be with a good PU I guess.

Those 160 hp are not permanent, are they? Meanwhile, from what we know, Honda PU can be permanently de-tuned, maybe not by as much as 160 HP, but still...

[Moose]

Honda is 120hp down on Mercedes!
http://www.inautonews.com/boullier-not- ... sting-cuts

Today Kimi lost his MGU-K which mean loss of 160hp and he was lapping 2 seconds slower than Vettel. So how slow was Mclaren today compared to Lewis and Ferrari. Maybe you can add 1.5 seconds to that and you will get what Mclaren's pace would be with a good PU I guess.

Those 160 hp are not permanent, are they? Meanwhile, from what we know, Honda PU can be permanently de-tuned, maybe not by as much as 160 HP, but still...

Also, Kimi will have been carrying around enough fuel for the assumption that the engine will be running nice and efficiently. McLaren have to carry around more because their engine is operating at reduced power consistently, and hence also operating inefficiently consistently.

[basti313]

Honda is 120hp down on Mercedes!
http://www.inautonews.com/boullier-not- ... sting-cuts

Today Kimi lost his MGU-K which mean loss of 160hp and he was lapping 2 seconds slower than Vettel. So how slow was Mclaren today compared to Lewis and Ferrari. Maybe you can add 1.5 seconds to that and you will get what Mclaren's pace would be with a good PU I guess.

It is not that easy. With the loss of MGU-K Kimi lost more than just the 160hp in regard to top power. He also lost breaking power on the rear wheels and a good power distribution out of corners.

[trinidefender]

A little piece of info for those interested in the aerodynamics of the new mirror mounts and piece behind it.

On the old vortex generator that hung horizintally the vortex was spun clockwise on the right hand side of the car (when at the rear of the car facing forward)

With the new vortex generator/small flow conditioner behind the mirror mount the vortex rotates the other way. Counter-clockwise on the right hand side of the car (when at the rear of the car looking forward) this will change how the vortex interacts with the vortex generators (and their associated vortices) as well as how airflow moves over the sidepod.

From what I can tell the large vertical surface of the new mirror mounts plus the vortex generator pushing outward helps to have a more outward flow effect on the sidepods. This aids the slight outward flow created by the vortex generators on the top of each sidepod. This combined effect helps push airflow around the sidepods and down onto the floor. The is an old pic that demonstrates this effect.

Here are two pics demonstrating such effect. Look at the flowvis paint at go from the top on the sidepod and curl around the side and down to the floor.

[diffuser]

Honda is 120hp down on Mercedes!
http://www.inautonews.com/boullier-not- ... sting-cuts

Today Kimi lost his MGU-K which mean loss of 160hp and he was lapping 2 seconds slower than Vettel. So how slow was Mclaren today compared to Lewis and Ferrari. Maybe you can add 1.5 seconds to that and you will get what Mclaren's pace would be with a good PU I guess.

It is not that easy. With the loss of MGU-K Kimi lost more than just the 160hp in regard to top power. He also lost breaking power on the rear wheels and a good power distribution out of corners.

Not sure that would be all that differenet fot McHonda.

Honda is 120hp down on Mercedes!
http://www.inautonews.com/boullier-not- ... sting-cuts

Today Kimi lost his MGU-K which mean loss of 160hp and he was lapping 2 seconds slower than Vettel. So how slow was Mclaren today compared to Lewis and Ferrari. Maybe you can add 1.5 seconds to that and you will get what Mclaren's pace would be with a good PU I guess.

In race pace that's about it 1.5......in Q its closer to 2 seconds

[Wazari]

Honda is 120hp down on Mercedes!
http://www.inautonews.com/boullier-not- ... sting-cuts

Today Kimi lost his MGU-K which mean loss of 160hp and he was lapping 2 seconds slower than Vettel. So how slow was Mclaren today compared to Lewis and Ferrari. Maybe you can add 1.5 seconds to that and you will get what Mclaren's pace would be with a good PU I guess.

In race pace that's about it 1.5......in Q its closer to 2 seconds

I don't understand why the loss of the MGU-K unit (120 KW max, approx. 160 HP) would equal 1.5 sec in race pace and 2 sec in qualifying? Also remember with a limit of 4MJ allowed per lap, that's about 30 to 35 secs. of that additional power available per lap.

[iichel]

imagine yourself driving an F1 car and imagine being in on Hockenheim.
you've just hit the brakes until your eyeballs came out, currently you're in the hairpin looking for that nice and clean exit.

right in front of you a mercedes with HAM in it and on your tail a red hot VET.

so after the hairpin is a long(ish) straight and you have the choice of:
A) ICE (625hp)
B) ICE + ERS (625hp + 160hp)

A: you accellerate on the ICE alone and after 10 seconds you're doing 280kph (?)
B: you accellerate on the ICE and MGU-K (so you have the full 800pk push in the back and all the traction you need) and after 10 seconds you're doing 300 kph

Let's say after 10 seconds, ERS is depleted and all is equal. But you have a 20 kph advantage and thus a 0.2 sec advantage at the end of the straight.
Do this 4-5 times a lap and there is your difference.

ERS deployment at the beginning of the acceleration period adds to top speed and decreases laptime.

Adding to that, loss of MGU-H will decrease the braking ability of the car and compensation by the (undersized) rear brakes
and (overheating) front brakes as demonstraged by the mercs in canada 2014
Numbers are semi-fictional of course but I hope you get the point.