The advantages associated to Vertical Short-Take-Off and Landing (VSTOL) have been demonstrated since the early days of aviation, with the initial technology being based on airship and later on helicopters. Its operational advantages are enormous, being it in the field of military, humanitarian and rescue operations, or even in general aviation. Helicopters have limits in their maximum horizontal speed and classic VSTOL airplanes have problems associated with their larger weight, due to the implementation of moving elements, when based on tilting rotors or turbojet vector thrusting mechanical oriented nozzles. A new alternative is proposed within the ACHEON Project. The review article introduces a detailed state-of-the-art review of the concepts that have been proposed in the framework of orienting jet propulsion systems. This review allows demonstrating the advantages of the new concept in comparison to competing technologies in use at present days, or of competing technologies under development worldwide. The review paper has been published by Prof. Pascoa (UBI) in the Central European Journal of Engineering issue of July 2013.