Igor Sikorsky once famously said, «the helicopter is probably the most versatile instrument ever invented by man», a thought echoed by many field commanders and soldiers alike. Indeed, helicopters provide a degree of versatility unlike any other present asset: they can be rapidly deployed, navigate through almost every type of terrain and provide firepower and protection. They cover a vast range of operational tasks, including reconnaissance, troops insertion and extraction, intelligence gathering, patrolling, SAR missions, and MEDEVAC. And now the Defiant, the latest arrival from Sikorsky and Boeing, has chosen its engine.