Abstract: An aircraft includes a fuselage having a nose end and a tail end and a center of gravity. A primary wing is coupled to the fuselage aft of the center of gravity. A secondary wing is coupled to the fuselage forward of the center of gravity. A v-tail is coupled to the fuselage between the primary wing and the tail end of the fuselage, the v-tail comprising first and second angled stabilizers, each of the first and second stabilizers including a first end fixed to the fuselage and a second free end, distal to the fuselage.

Abstract: An automated conveyorized wash system to wash oil field positive displacement motors and drilling tools can include a conveyor track to guide a load-carrying carriage filled with drilling tool parts and/or displacement motors along a predetermined path inside the washer. A relay switch and control means can be used to begin and end the washing process. Oscillating nozzle arrays and rotating nozzles are disposed throughout a series of sprayer tube assemblies further mounted onto a framework to dispense water or aqueous cleaning solution at the tool parts and/or displacement motors as they travel inside the carriage. Heated water can be used and stored in a reservoir. Motorized pumps transfer the water through flexible hosing to the spray nozzles.