Directional control system and method of providing directional control

A directional control system for a rotorcraft having an internal combustion engine, a main rotor and a tail boom, the directional control system comprising:

• a no-tail-rotor apparatus configured to control rotorcraft yaw using forced air ejected from the tail boom;
• a duct configured to deliver the forced air to the no-tail-rotor apparatus;
• a heat exchanger in heat exchange relationship with an internal combustion engine, the heat exchanger having air passages and fluid passages, the air passages in fluid communication with the duct, the fluid passages in heat exchange relationship with the air passages and configured for receiving a cooling fluid of the internal combustion engine;
• and
• a forced air driver in fluid communication with the duct and the air passages of the heat exchanger for driving the forced air, including engine cooler exhaust air from the air passages, through the duct to the no-tail-rotor apparatus.