F1 » Alonso: We need to end McLaren run

Fernando Alonso says Ferrari needs to end McLaren's winning run as F1 heads for Singapore

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September 21, 2012 5:44 PM

Rob, My confusion?.
Roberto Dalia (Magnetti Marelli), all the analysis we have done has shown that the part has no problems, It has failed because of the exceptional mechanical stress it is exposed too.
Renault will not dump Magnetti Marelli.


September 21, 2012 6:15 PM

sunny. rather an odd comment by dalia! "the part has no problems" "failed due to exceptional mechanical stress"

to me, that sounds as if there IS a problem! you cannot design a part for an f1 engine and then blame exceptional stress.
either the part was suitable for an f1 engine or it wasnt. if it failed on several engines, then it appears that the part was not suitable


September 21, 2012 7:15 PM

Richard, technically speaking things are not reasoned that way/like that.
Renault is the manufacturer of the alternator they are also the users (spells) integrating it in their engine design, as with most things in this business there are various suppliers of internal parts such as bearings, material/stock and electrical parts, Magnetti Marelli are declaring there is nothing wrong with the electrical part that failed, this electrical part was chosen and integrated into a design by Renault, Renault chose the part on its specification I am one hundred percent sure that the part specifications has been exceeded by Renault and their RBR customer.


September 21, 2012 7:47 PM

sunny. i see what you are getting at, but even so, mm who also supply parts to ferrari, should be well aware of the forces concerned, even if the spec supplied by renault were adhered to. it should be a little like testing pressure vessels, the parts should be tested with a 50% overload, or do you think that even that sort of overload was exceeded?


September 21, 2012 8:25 PM

Richard, it's not done with a fifty percent overload, it's done with a factor of from 1 to ten.
Yes I am certain that the off the shelve part that failed bought/picked up by Renault the specification of which was exceeded by Renault/RBR as users.
As I said, the alternator which have an output of 35 AMP/H can run at a maximum winding temperture of 200 degrees C and at a maximum bearings temperture of 150 degreed C, if these tempertures are exceeded it doesnt mean a faild part is defective or weak.

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