Originally Posted by erchn
I'm actually curios as to why FFG doesn't transfer any torque to the back of the chassis through the tube? Note: it's highly likely I'm not seeing the whole picture, while looking at the pictures. :-)
I have to clarify:
there is not transfer of the torque from the rear gearbox to the front end of the chassis
hence there is not any additional parasitic torsion flex of the chassis between the rear gearbox and the front gearbox caused by the torque from the main shaft.
In addition to this we got with FFG a completely new chassis's flex system.
With FFG and without the conventional flat top deck installed:
1. We have the possibility to switch "off" or "on" the additional longitudinal flex (bending) for the rear and the front chassis's ends independently.
2. We eliminate the transfer of the chassis's longitudinal flex (bending) from the front suspension to the rear suspension area and vice versa.
All current cars with the conventional top decks have this parasitic ( according to my opinion) transfer of the longitudinal flex.
You can easily see it - just press the center area of your car by hand to the car stand and simultaneously try to lift the front end of the car. You will see that the top deck transfers the bending of the front end of chassis to the rear and the chassis's rear end bends down. I think that this is not good as it makes the front and rear suspensions "a bit not independant".
3. A twisted chassis problem goes away. No top deck = no twisted chassis.
4. We can use very thin chassis now in case of track conditions will require.
The stiff top rod of FFG combined with the central brace support prevents the excessive bending of such chassis.