摘要:
According to some embodiments, there is provided a ballistic-resistant composite including a plurality of large denier per filament (dpf) yarns. The large dpf yarns may have a “Composite-Armor dpf factor” (CA•dpf) of greater than or equal to 6.9.
摘要:
There is provided a ballistic resistant composite including a plurality of large denier per filament (dpf) yarns which are in contact with a resm to form a composite The resm may be thermosetting resm or thermoplastic resm The large dpf yarns may be assigned a "Composite- Armor dpf factor " calculated by CA-dpf factor = dpf yarn x (density yarn ) 3 , where "dpf yarn is the yarn's filament denier and "density yarn is the yarns density.
摘要:
The phase control mechanism includes first gears (3,4) coupled to the output shafts (2,1a) which are to be phase controlled. A Transfer gear (5) is provided for rotation or operation independent of the input and is coupled to the first gears (3,4) to allow rotary motion to be transferred between the first gear members (3,4) and a phase adjuster (10,17) causes the first gears (3,4) to advance on regress relative to one another to change the phase relationship between the outputs.
摘要:
A marine propeller includes a hub rotatable about a longitudinal axis and having a plurality of blades extending radially outwardly therefrom and pivotable about respective radial pivot axes between a low pitch position and a high pitch position. Each blade has a hydrodynamic force characteristic which shifts the location of the resultant hydrodynamic force on the blade in a direction aiding up-pitching of the blade, and increasing the up-pitching pivot moment with decreasing angles of attack. A counteractive hydrodynamic force generating area is provided on the negative pressure backside surface of the blade and shifts the location of the resultant hydrodynamic force on the frontside surface forwardly with decreasing angle of attack. The blade is pivoted by increased water flow along the counteractive hydrodynamic force generating area with decreasing angles of attack, which increased water flow generates a backside hydrodynamic force on the blade at the counteractive hydrodynamic force generating area spaced from the pivot axis by a moment arm provided by the section of the blade between the pivot axis and the counteractive hydrodynamic force generating area, such that the backside hydrodynamic force acting on the moment arm pivots the blade to an increased pitch position. The counteractive hydrodynamic force generating area on the backside surface at the rearward trailing portion separates water flow along the backside surface at high angles of attack, and re-attaches water flow along the backside surface at low angles of attack to change the backside surface at the rearward trailing portion to a positive pressure area to generate the up-pitching moment. A disc has a plurality of guide slots each receiving and retaining a respective lever arm extending rearwardly within the hub from a respective blade. A biasing spring coaxial with the longitudinal axis of rotation of the hub biases the disc to in turn bias the lever arms and blades to the low pitch position. The disc is a generally flat planar plate-like member extending radially outwardly from the longitudinal axis at the rear of the hub and includes a preload mechanism accessible at the rear of the hub for adjusting the bias. The disc restricts movement of the lever arms along the guide slots such that the lever arms can move only in unison, which prevents blade flutter. Pivoting of the blades is controlled by both a) movement of the lever arms along the guide slots, and b) arcuate movement of the guide slots as the disc rotates about the longitudinal axis, such that pivoting of each blade from its low pitch position to its high pitch position requires both a) movement of the respective lever arm along its respective guide slot, and b) rotation of the disc to arcuately move the guide slot.
摘要:
Die vorliegende Erfindung betrifft ein Verfahren zum Betreiben eines Schiffes 10 mit einem Fahrmotor 20, einem Verstellpropeller 30, einem Schiffsleitstand 40 und einem Leitsystem 50, wobei über den Schiffsleitstand 40 eine Geschwindigkeitsvorgabe vorgegeben und an das Leitsystem 50 übergeben wird, wobei das Leitsystem 50 die Drehzahl des Fahrmotors 20 und das Steigungsverhältnis des Verstellpropellers 30 ermittelt und ansteuert, dadurch gekennzeichnet, dass das Leitsystem 50 wenigstens eine erste Fahrkurve 61, 120 und eine zweite Fahrkurve 62, 120 aufweist, wobei die erste Fahrkurve 61, 120 optimiert ist auf eines der Anforderungen ausgewählt aus der Liste umfassend Effizienz 140, Leistungsreserve 130, akustische Signatur, wobei die zweite Fahrkurve 62, 120 optimiert ist auf eine sich von der ersten Fahrkurve 61, 120 unterscheidenden Anforderungen ausgewählt aus der Liste umfassend Effizienz 140, Leistungsreserve 130, akustische Signatur, wobei zusätzlich eine Missionsanforderung vorgegeben wird ausgewählt aus der Liste umfassend Effizienz 140, Leistungsreserve 130, akustische Signatur.
摘要:
Method for operating a ship propulsion system (11), wherein the ship propulsion system (11) has a ship's engine (12), optionally a transmission (16), a propeller shaft (14) and an adjustable propeller (15), wherein the transmission (16) is connected between the ship's engine (12) and the adjustable propeller (15) coupled to the propeller shaft (14), in such a way that the transmission (16) converts a rotational speed of an engine shaft (13) of the ship's engine (12) into a rotational speed of the propeller shaft (14), and wherein the adjustable propeller (15) can be adjusted in order to adjust a pitch angle of the adjustable propeller (15), wherein a setpoint rotational speed is determined for the propeller shaft (14) and a setpoint pitch angle for the adjustable propeller (15) on the control side and automatically on the basis of an adjustable propeller characteristic diagram and as a function of an operator-side drive request to the ship propulsion system, and wherein a setpoint operating point, specifically a setpoint rotational speed and a setpoint torque, are determined for the ship's engine (12) on the control and automatically on the basis of a ship's engine characteristic diagram side as a function of the operator-side drive request and as a function of the setpoint rotational speed for the propeller shaft (14). An actual operating point of the ship's engine (12) is determined as a function of a measured actual rotational speed and a measured actual torque, wherein it is checked on the control side as a function of the actual operating point of the ship's engine (12) and automatically on the basis of the adjustable propeller characteristic diagram and the ship's engine characteristic diagram whether, when the drive power is constant, the set point rotational speed for the propeller shaft (14) and the setpoint pitch angle for the adjustable propeller (15) can be varied while reducing fuel consumption of the ship's engine (12), wherein, when this is possible, the setpoint rotational speed for the propeller shaft (14), the setpoint pitch angle for the adjustable propeller (15) and the setpoint operating point of the ship's engine (12) are adapted.
摘要:
Methods and systems are provided for controlling a propulsion system ( 100 ) of a vessel ( 10 ) including an engine ( 102 ) and a propeller ( 104 ). In one embodiment, the method comprises independently adjusting each of an engine setting and a propeller setting responsive Io real-time vessel operating data. In another embodiment, a propulsion system comprises an engine, a propeller driven through a propeller shaft ( 106 ), a torsion meter ( 107 ) mounted on the propeller shaft, and a controller ( 112 ) which can independently adjust engine settings such as engine speed setting and/or engine torque setting, and propeller setting, such as propeller pitch setting, responsive to real-time data of the vessel propelled by the propulsion system, including output data of the torsion meter.
摘要:
The phase control mechanism includes first gears (3,4) coupled to the output shafts (2,1a) which are to be phase controlled. A Transfer gear (5) is provided for rotation or operation independent of the input and is coupled to the first gears (3,4) to allow rotary motion to be transferred between the first gear members (3,4) and a phase adjuster (10,17) causes the first gears (3,4) to advance on regress relative to one another to change the phase relationship between the outputs.