Originally Posted by F1Guy
Honda F1 chief Yusuke Hasegawa has apparently just announced that Honda are now working on yet another new engine!
Well, the way you say that it sounds as if they just dumped what they have now in the trash and are starting with a blank sheet all over again!
Assuming we are looking at the same articles, they are going to be releasing a revised version of this engine somewhere around Monaco. And, IMHO that is pretty much to be expected. You have a series of fly away races in which McLaren is generally stuck with the current spec (+/-). I would actually be shocked if a revision wasn't arriving around that time (or earlier if Honda is able to make it happen that fast). This is actually good news. So no need to invent additional drama.
Originally Posted by knighty
A very good report on Hondas situation by Joe Saward......lightweight components = low stiffness = vey low natural frequency = severe vibrations within the working rpm range of the motor.......I'm betting Honda built a super lightweight crankshaft, probably formed by laser-sintering, so could be wafer thin wall section, but subsequently very flexible = vibrations
The regulations fix some dimensions of the crank such as main and rod journal diameters (actually sets minimum sizes). So I believe that attempts to prevent small cranks, but doesn't require them to be solid. I have read elsewhere about the potential for a hollow crank to reduce weight.
I have also read speculation about a different firing order and/or aggressive cylinder deactivation (run as V4 at times) causing problems. I wonder if part of this revision is to a different firing order (new crank and cam much like Porsche had to do with their LMP1 v4 after vibration issues when the engine was in the car for the first time) and I have heard that maybe the cylinder deactivation can be mostly solved (or reduced) by mapping changes.
Lastly, while Joe Saward gets on my nerves at times, that article is a healthy dose of reality. Especially around the implications of McLaren dumping Honda during 2017 season (highly unlikely). That is exactly the reasons I predicted in the time capsule thread that they would remain partners for 2017.
I tend to believe Honda will get this right, but the question is how deep into the season will it take. Even now, we are seeing McLaren run FP1 and FP2 without the types of failures they had in pre-season testing. Granted, they are likely restricted by specific boundaries (lower revs, etc.) that will limit performance. I expect the immediate goal (using the engines they have at the moment) is to get laps and ensure the cars finish races. The first race or two may be nothing more than extended test sessions for McLaren to make up for lost time.