F1 » Horner lays blame on McLaren ECU for Webber woes

With McLaren's technical standing taking a beating on track, now its their provision of the latest generation of ECUs that's under the spotlight.

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Mark _

March 19, 2013 2:56 PM

@Prof-x - I believe that you have misinterpreted what Sunny said. The way that I understand it is that there is gearing between the KERS unit and the drive shaft which allows the KERS unit to spin at twice the speed of the drive shaft. So for the KERS to produce maximum horsepower the engine has to be at 18000 rpm. I did not see anything about an alternator or as you put it a "gizmo" in Sunny's post. While I am no authority on the technical side of F1 I trust that Sunny is not theorizing here. Remember that there are a lot of comments from people on this site for whom English is not their first language. As for the ad hominems perhaps you should re-read what you posted in your attack on Sunny.


March 19, 2013 3:12 PM

Fair point, though the one lengthy comment i read that was attributed to Horner suggested something different. But, heat of battle and all that. I am interested in what both RB and McLaren have to say about the incident in a few day's time.

rob01 - Unregistered

March 19, 2013 3:38 PM

mclaren supplies Nascar with ecu's and have never stopped ONE car. the problem lies in how red bunk is trying to talk with the unit. it was said yesterday that red bunk was trying to achieve results that the unit is now designed to prevent.


March 19, 2013 5:19 PM

Profs, I was not pretending anything, I was talking technical facts which I am sorry to say you are not up to it and so you couldn't understand, the least you should have done was not to comment not having the technical savvy to do so.
Mark, thanks for the support, yes, you was right about the gearing, I will try to explain things a bit better.
The KERS MGU is attached to the crankshaft on the front of the engine through a tiny spur gear gearbox and clutch, the gearbox output shaft is geared down at a ratio of 2:1 which means when the engine is running at 18k rpm the MGU is running at 36k rpm, the MGU functions both as a motor as well as a generator, when the driver is not using KERS and as long as the driver doesn't use the brakes the MGU is disengaged by its own clutch and so it's not rotating. To be continued.


March 19, 2013 5:40 PM

Continued, when the driver hits the brakes the clutch will engage and the MGU will function as a generator (charging the batteries), when the driver activates KERS the clutch engage and the MGU will function as a motor (capacity) 80hp for 6.6 seconds, these 80hp for 6.6 seconds can be divided and any portion used at will by the driver, because the clutch acts like a switch on demand (braking or KERS activation) when the MGU is not in use the crankshaft has no additional hardware (mass) to rotate, at the start (from a standstill) KERS will come on line above 100km/h. (Note) inside the distance Webber covered to reach 100km/h and where KERS is not on line he was passed by several cars.

sam - Unregistered

March 19, 2013 5:50 PM

rickard said the fact that the software was not been transmitted/received, shows that control of the kers by the driver, was intefered with by the software

no the ecu could work perfect and respond to all dtriver commands but take off the ariel and the team will lose telemetry., you cannot assume broken telemetry means other part of ecu not working either. you cannot even say it is any more likely.

sam - Unregistered

March 19, 2013 5:59 PM

i am puzzled how kers work. if it is charged by engine rotation is it acting as an engine brak. if not how is it kinetic energy recovery, it sound more like it is just using more fuel to charge battery to give another way of driving wheels. i thought kers was about recovering kintic energy lost from braking, not using more fuel to charge up battery.


March 19, 2013 6:42 PM

delighted to see that what i have been saying has at last been ackowledged by mes. they have admitted that there was a software problem and have formally apologised to rbr and webber..


March 19, 2013 6:51 PM

Sam, read my latest two posts and you will understand how KERS work.
The acronym KERS stands for kinetic energy recovery system, the KERS batteries are charged by the MGU which is rotated by the engine when the driver hits the brakes so KERS uses no more fuel than the engine needs to charge the batteries and yes it does have the effect of adding engine braking.

atxsxsw - Unregistered

March 19, 2013 7:59 PM

And now McLaren MES has issued an official apology to Mark Webber and Red Bull acknowledging that the blame lies with them and not Red Bull.

So much for all the Macca apologists. Wonder what's the result at the end of the season if Red Bull loses out on the Constructors' championship or Mark loses out on the Drivers' championship by just a point or two as a result of McLaren's incompetence.

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