Braking hardware includes full brake kits including calipers, rotors and stainless steel braided brake lines. The car is equipped with Brembo brake calipers, rotors and pads. Front brakes were disks with solid rotors. Bigger brake rotors and calipers were added and the front suspension was strengthened. This is commonly accomplished by a tail rotor, coaxial rotors, and the NOTAR systems. Brakes too were upgraded to larger 332mm front rotors on LWB versions. The braking system included larger cross-drilled front rotors. The parts include pistons, hinges and rotors. The tips of rotating surfaces (such as propellers and rotors) sometimes produce visible contrails. The rotating airfoils, also known as blades or "rotors", accelerate the fluid. This Enigma variant was a four-wheel unsteckered machine with multiple notches on the rotors. Another approach (Magnax) is to use a single stator sandwiched between two rotors. The largest machines were on towers with four-bladed diameter rotors. It is a compound helicopter with rigid coaxial rotors and two Honeywell T55 engines. Little used, it contained four rotors mounted vertically.