As intended, it would have functioned as a stealth helicopter, incorporating a number of different techniques and technologies in order to reduce its radar cross-section (RCS) along with other areas of visibility and detectability. The exterior surfaces of the RAH-66 were faceted and covered with both radar-absorbent material (RAM) coatings and infrared-suppressant paint; as a result of these combined measures, the Comanche's RCS was stated to be 360 times smaller than that of the AH-64 Apache. The acoustic signature of the helicopter was also reported to be noticeably lower than comparative helicopters; this reduction had been partially achieved through the adoption of an all-composite five-blade main rotor and pioneering canted tail rotor assembly.