Originally Posted by 20bPlease' date='Jan 13 2005, 09:08 PM

not true... the rotors are yes open in the center but not "hollow." by hollow i mean the useless area between the apex and the center hole. thats alot of unnecessary weigth in that cast iron. now i know a certain degree of thickness is required to and the pressure but i believe that the right fabricator could actually use titanium plates or maybe inconel or even other light materials and cnc weld or laser weld the unit together incredibly reducing mass. The unit is already triangulated and anyone who knows anything knows that triangles are extremely strong designs so i dont see why a hollow core rotor would fail. probably wouldnt be good for drag racers who need that inertial energy to launch the car but for the road racers its perfect. I honestly think you could save a very meaniful level of weight which could really help these things spin up faster and higher... i mean hell they already spin high enough but a lighter rotor wouldnt have as much to worry about the g's tossing as much weight around and also hopefully avoid that dreaded dragging on the sideplates. From my rotary knowledge the only part of the rotor that touches metal(besides the gear on the inside) is the apex and oil seals correct? because titanium doesnt do well with direct metal to metal contact. I dunno maybe im just dreaming but I am an engineer and i was going through some of the machinery at a power plant im working at and it just got me thinking...