Re: Push-rod versus pull-rod suspension Quote:
Originally Posted by deetjohn |
Its not just the pull-rod dude! Gary Anderson and all the old boys have been talking crap while Ferrari has denied any issues with the pull-rod. The pull-rod was used by Ferrari for the reason quoted below.
Gary Anderson was mentioning that the contact patch of the front tires keeps changing through entry and exit of corners and that is because of the pull-rods. But if that was the case, Alonso would have never been able to show that pace in wet track like he did in Malaysia. So give the oldies a break
Here is a brief translation of what was tweeted by JoseLuisF1 yesterday on Ferrari's trouble. I am feeling confident that its a fixable issue
BTW, JoseLuisF1 works in the SF Team and he has been reliable informer from Ferrari
The below quote was translated by e34@AtlasF1 Quote:
The long twitter by @Paliyoes and retwitted by joseluis
The real problem with the F2012, a problem Ferrari cannot openly admit, is the ban of reactive suspensions (Lotus style). Ferrari's were even more radical than the Lotus, as they inter-connected also the front and the rear wheels and the left and right sides. This explains why the car behaves well with heavy loads and why it ceases to be effective under light loads; such a system would allow to maintain a stable height, and even more important, would improve the balance under braking, in pure traction exits and in slow curves. As Ferrari was not allowed to put it on the car, the rest of the car suffers, as everything was designed for that device.
The starting point of the exhaust system, pointing towards the wings of the rear brakes (that never had been so complex in a Ferrari car) would work with that device, but when the system was stripped from the car, all the original exhaust system did was to increase the instability that the device would have prevented. When it is said that there is a team in Maranello that is working on the initial exhaust solution, I think that what they are trying to do is develop such suspension device, but in a way that the FIA may not ban; meanwhile there is another team that is working on a new location for the exahusts (as the McLaren one, etc), and for that alternative location, it will be necessary to modify the sidepods and the engine cap, removing the "Acer Duct". If the first team is successful, the car will be a blast; if it is not, and the second alternative is used, the car may only be abreast of rivals, but not above them.
The ban of reactive suspensions by the FIA has resulted in a bigger loss for Ferrari than for Renault or for any of the other teams in the championship. This explanation is twofold; on the one hand that of Ferrari went beyond, as it interconnected the front and the rear wheels and the left and right sides, while the Lotus Renault solution was limited to prevent the pitch (or change in pitch) under braking and acceleration.
On the other hand the Ferrari is much more "pitch sensitive" than the Renault or any rivals who had plans to use such devices, because of its wide and very fine nose, that does not have an overhung, almost like a horizontal spoiler, different to any other nose used by the teams on the Championship, which are narrower, thicker and extending ahead of the pillars. The Ferrari is thereby subject to pressures from the nose, as when you get your hand out of the window of a car and put it horizontally: a little tilting is all it takes to displace it. When the Ferrari slows down, the nose tends to fall, and that gives more downforce in the front, but at the same time, it removes downforce from the rear and it, therefore, makes the car less stable under braking than the engineers had hoped when they designed it with the reactive suspension that initially the FIA did not declare illegal (which was why it was initially developed by several teams); later, coming out from a slow curve, the nose rises and reduces the downforce in the front, increasing it in the rear; that should be good for traction, but the traction lost at the front means that the improved traction may not be fully used, as the car would oversteer, forcing drivers to get out of slow corners with more restraint than necessary.
The woes of Ferrari begun due to the absence of a device designed to improve the balance, and due to the flawed aerodynamics of the car, that were planned for being used with that device.
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Last edited by aah78 : 29th March 2012 at 19:43.
Reason: Post edited on request.
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