Hino wrote: ↑
Fri Jun 15, 2018 7:29 pm
MPH: hot Honda sets up Red Bull deal
The ‘size zero’ concept of having the turbo in the vee quickly became an obsolete layout because of efficiencies in the hybrid systems improving enough to justify far bigger turbos than could be fitted. Even after that concept was abandoned for last year, vibrational problems that limited the performance could have been fixed, say Honda, if only the problem mechanical components had been allowed a little more space.
article by Mark Hughes.
Mark Hughes has no clue, looks like he's just writing stuffs coming out of his head not based on evidence.
I don't know why so many people keep being obsessed with size zero. Smaller lighter faster/stronger/better/etc is basic and common principle of engineering, "size zero" is merely what Ron Dennis came up with in presentation of the car. Look at this year's Merc, or any other cars and makers, all of them are size zero too, look at whatever stuffs around you, everything is size zero as well, and most importantly the fundamental and premise about this common basic engineering principle is about performance not being sacrificed, not about the small-ness for the sake of small-ness. For journos and some people buzzwords and cliches of any sorts are convenient tool to come across and allow themselves to be lazy. Forget about size zero already, it has already long passed a point where anyone mentioning this particular word should be dismissed/disregarded instantly. Honda themselves (Arai, Hasegawa and other Honda engineers) have repeatedly been saying they were not forced anything from McLaren, that the 2015 config was what McLaren and Honda worked on and reached together, and turbo being too small etc etc was because Honda back then did not have sort of technological "knack" about the whole thing of this high level and complicated F1 power unit, etc etc, yet why some people keep saying McLaren forced Honda or it was McLaren fault or whatever, I have no idea.
Regarding the vibration issue at the beginning of 2017, firstly, lack of preparation/collaboration. They didn't dyno-test the PU with real gearbox attached in winter (Honda engineer Kakuda, in f1sokuho special edition 2018). Hasegawa repeatedly recalled and regretted there was not enough technical collaborations between McLaren in matching preparation process during winter.
Secondly, there were 2 separate vibration/oscillation issues. Initially revised MGU-K was having issue, which arose only when matched with real gearbox and run under real on-track environment. MGU-K's shaft was breaking because of its vibration with drive system. This was solved in time for Melbourne. [f1sokuho special edition 2018]. Then the first version of ICE had erratic combustion issue in lower rpm range, that was causing cliff in torque curve and inconsistent power delivery in low-mid rpm range. This was another and major cause of vibration. Was solved in Spain with the upgrade to intake system which improved low speed torque. [repeatedly explained by Hasegawa across GPs]
So in short, lack of dyno experiment/evaluation opportunity, insufficient exchange b/w McLaren and inherent issue/flaw in initial version ICE as well as MGU-K. Nothing to do with space or sizing.