Visualize your hand as the caliper on the right front brake, observed from standing outside, to the right of the car. If your hand was behind the center of the wheel, and you gripped the brake, your hand would be forced up. If it was fixed to the upright, it would be exerting a clockwise torque against the upright. If your hand was in front of the wheel centerline as you gripped the brake disk, you would exert a torque that too was clockwise. The location may be different, but the resulting force remains in the same direction and force.RH1300S wrote:Yes, but the if the caliper is mounted on the upright (in this case it is) - if behind the upright the direction the caliper will be moved in is upwards (and rotating). If you grab a spinning bicycle wheel with your hand, from the back your hand will be pulled up; from the front, downward.
As a matter of fact, that piece of engineering marvel called the Citroen 2CV originally had interconnected central mounted springs, linked to the front and rear wheels of each side to achieve a anti-pitch and dive effect (and quite successfully, also). The 2CV had naturally (was a Citroen!!!!!) fully independent suspensions.RacingManiac wrote:About the anti-pitch/dive bar, I think its not feasible for a regular car as the distance the bar needs to span is too great and hard to package, but I can see someone trying that at some point in Formula SAE when cars have ~ 60 inches of wheelbase....
it'll be more difficult to do with double wishbone though......most system nowadays are still hydralic based....which I guess is the same idea as the 2CV...dumrick wrote:As a matter of fact, that piece of engineering marvel called the Citroen 2CV originally had interconnected central mounted springs, linked to the front and rear wheels of each side to achieve a anti-pitch and dive effect (and quite successfully, also). The 2CV had naturally (was a Citroen!!!!!) fully independent suspensions.RacingManiac wrote:About the anti-pitch/dive bar, I think its not feasible for a regular car as the distance the bar needs to span is too great and hard to package, but I can see someone trying that at some point in Formula SAE when cars have ~ 60 inches of wheelbase....
http://home.iprimus.com.au/hobbier/chri ... pslow.html
In fact, in a thread here lost by the tides of time, there was mentioned an interesting system that was fitted in the WRC Citroens (still CitroenRacingManiac wrote:it'll be more difficult to do with double wishbone though......most system nowadays are still hydralic based....which I guess is the same idea as the 2CV...
) that connects hidraulically the shock absorbers from diagonal sides (front left/rear right and front right/rear left), that was supposed to be responsible for a certain amount of the Xsara dominance in WRC. The function of this system is partly to control the lift and dive movements of the body of the car. University of Western Australia has the system, they purchased the license for it and integrated on their FSAE car.......DaveKillens wrote:http://www.kinetic.au.com/techno.html
but I still cant get my head around this 
Surely the position of the caliper is irrellevent when considering the forces being put into the upper and lower outboard suspension joints as the braking moment will be a rotational moment about the wheel centre 
