Mclaren MP4-30 Honda

[Lucky]

http://www.omnicorse.it/magazine/50767/ ... posteriore

[Jashko]

Now to make this quick, the entire ICE at about 35% efficiency produces heat a rate in orders of magnitudes greater than 18kW. The point is, if they can cool, the entire engine minus the MGU-K, the additional task of cooling the MGU-K will be easy.

A lot of the heat produced by ICE goes out with exhausts. 18kW of heat is not very small, especially because ICE normally are marginal (e.g. F1 cars don't like to be run slowly, don't like staying stationary with engine running etc). And also the energy density needs to be considered. MGU-K unit is small, so again if it produces that much of heat, things can get really tough in its vicinity.

Decided not to go there but 18kW compared with what goes into the radiator is small. Also this 18KW is super aggressive and if we have an electrical engineer here, he'll say 99% motor efficiency isn't unusual. The MGU-K, isn't working all the time also...unlike the ICE. If MGU-K overheating has been the bulk of their problem, they've had weeks after the first test to start augmenting their cooling. Redbull did that last year. So far there's been zilch sign of that at mclaren

I am an electrical engineer, and definately you are right, efficiency is around 99 %...but on the contrary MGU - K is working all the time. It is mechanically linked with the crankshaft, and just because this is high performance vehicle, they need to keep it working for immediate response on need. Everything in nature has its inertia, electrical conductors, coils, magnetic fields need some time to enter its operating state (the result of accumulated energy in system - voltage, currents will behave differently until they enter operating state).

I don't think that overheating is their major problem, but as the ERS system are so important it just adds up to give them a one hell of a headache.

[Thunder]

Do i see an S-Duct? 99% sure it is not a reflection.



Edit: Also the Engine Cover seems to be tighter, i can't remember the bulb just in Front of the "Honda".

[Postmoe]

There's likely nothing to the MGU-K overheating story. Conservatively, electric motors and generators, are at least 95% efficient across their entire envelope of operation. Let's take for a example a braking event from 250kph to 50kph in 100m for a car that weighs about 720kg; with brake bias of 50% F/R. So using m*v^2 delta, energy into rear axle is half of the total...which is about 1.7MJ of energy.
Assuming the MGU-K takes 50% of that, we have 0.9MJ of energy going through it. At the previously stated efficiency of 95%, that leaves 43kJ of heat into the MGU-K in 100m. At constant deceleration, it'll take about 2.4 seconds for this event to take place. So we have heat transfer at a rate of 18kW.
Now to make this quick, the entire ICE at about 35% efficiency produces heat a rate in orders of magnitudes greater than 18kW. The point is, if they can cool, the entire engine minus the MGU-K, the additional task of cooling the MGU-K will be easy.
Again, this is the same MGU-K motor that can be put between the turbine and impeller housings of a turbo to make an MGU-H....a much harsher location in my opinion.
I think the entire package has a myriad of problems...of course a few more prominent than others...but MGU-K cooling isn't one...if engine cooling is roughly adequate, all they'd have done was run coolant to the MGU-K if they aren't already.

I have to disagree with you, electric motors are very sensitive to overheating. Especially, MGU - K and H are synchronous permanent magnet motors. Permanent magnets lose ability to generate magnetic field in overheating conditions, this leads to various problems - electric motor/generator stops generating torque as the link between stator and rotor field is broken. Excessive heat has a spiraling effect on electric motor/generator, as the heat builds up, conductors heat up, resistance goes up, more current has to pass through them to maintaine magnetic field, and more current produces more heat...

So besides the regular problem regarding integration of all these components, there is a massive problem with excessive heat...

Like when you OC your CPU? Very lamequestion, I know.

[Lucky]

En el pontón derecho ... RT @AlbertFabrega: El intercooler del McLaren MP4-30.

https://twitter.com/Albrodpul/status/581053246262870016

[Postmoe]

Do i see an S-Duct? 99% sure it is not a reflection.

It would be a hell of a reflection, there's even a cable running there and some harrdware seemingly related to the suspension tunning.

[dren]

Like Button said, there are a few aero updates to the car. It looks like an S-duct and a new front wing.

[mclaren111]

Amus:

[Jef Patat]

Do i see an S-Duct? 99% sure it is not a reflection.

It would be a hell of a reflection, there's even a cable running there and some harrdware seemingly related to the suspension tunning.

That's the cable to activate the reflection

Seriously: it seems like that cable is in some kind of a tray and that tiny part sticking out of it at the end, doesn't look very aerodynamic. I think there is still something missing there.

Edit: the pitot tube is missing

[frosty125]

S-Duct has finally arrived and looks like quite a refined one not like Force India where the outlet bulges out the top of the nose.

Mice pictures of the intercooler the inlet and outlet are approximately halfway down the cooler by the looks of things.

[Thunder]

Seriously: it seems like that cable is in some kind of a tray and that tiny part sticking out of it at the end, doesn't look very aerodynamic. I think there is still something missing there.

Edit: the pitot tube is missing

Jep thats what i think too, the Pitot Array will be mounted`where that Cable is.

Edit: Now i'm pretty sure. The position would fit. (Picture is from Melbourne to show the Position of the Array)

[ringo]

That bulb on the engine cover has been there from testing.
Funny that we can't get a good shot of the engine up to now.

[Jef Patat]

Edit: Also the Engine Cover seems to be tighter, i can't remember the bulb just in Front of the "Honda".

I don't think that part looks different:
http://www.f1technical.net/forum/viewto ... 57#p567757

[Thunder]

Yes is was looking too hard.

[Abarth]

[[....]efficiency is around 99 %...[...]

That would be extremely optimistic. I don't believe that you can go beyond 96% with such motors.

And 4% of 120kW is almost 5kW of heat. Not trivial.