Each propeller of the twin-screw ship develops a full-speed thrust of F = 375 kN. In maneuvering the ship, one propeller is turning full speed ahead and the other full speed in reverse. What thrust P must each tug exert on the ship to counteract the effect of the ship's propellers? Assume a = 55 m, b = 100 m, c = 14 m. a
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- Each propeller of the twin-screw ship develops a full-speed thrust of F= 290 KN. In maneuvering the ship, one propeller is turning full speed ahead and the other full speed in reverse. What thrust P must each tug exert on the ship to counteract the effect of the ship's propellers? Assume a = 59 m, b=116 m.c=18 m. D÷ Answer: P = KN Hluta5. Each propeller of the twin screw ship develops a full speed thrust of 300 KN. In manoeuvring the ship, one propeller is turming full speed ahead and the other full speed in reverse. What thrust P must each tug exert on the ship to counteract the turning effect of the ship's propellers? - 50 m- 12 n F 120 mEach propeller of the twin-screw ship develops a full-speed thrust of F = 330 kN. In maneuvering the ship, one propeller is turning full speed ahead and the other full speed in reverse. What thrust P must each tug exert on the ship to counteract the effect of the ship's propellers? Assume a = 55 m, b = 133 m, c = 18 m. Answer: P = J KN F F
- Each propeller of the twin-screw ship develops a full-speed thrust of F = 340 kN. In maneuvering the ship, one propeller is turning full speed ahead and the other full speed in reverse. What thrust P must each tug exert on the ship to counteract the effect of the ship's propellers? Assume a = = 44 m, b = 113 m, c = 16 m. 14 Answer: P = i KN FEach propeller of the twin-screw ship develops a full-speed thrust of F = 245 kN. In maneuvering the ship, one propeller is turning full speed ahead and the other full speed in reverse. What thrust P must each tug exert on the ship to counteract the effect of the ship's propellers? Assume a = 49 m, b = 133 m, c = 18 m. Answer: P = i D÷ KNA torque T = 0.30 N-m is applied to a bevel gear B. Bevel gear D meshes with gear B and drives pump A. Gear B has a radius of gyration of 150 mm and a weight of 50 N, whereas gear D and the im- peller of pump A have a combined radius of gy- ration of 50 mm and a weight of 100 N. Find how many revolutions of gear B are needed to get the pump up to 200 rpm from rest. What is the power output of the pump at this speed if it is 90% efficient.
- The turning-moment diagram for an engine consists of two isosceles triangles each with a height equivalent to a torque of 16kNm. The bases of the triangles lie between ? = 0 ? and ? = 180? , and ? = 180? and ? = 360? Sketch the turning-moment diagram and add the mean torque line. If the engine is to rotate with a mean speed of 130 rpm, calculate the following: the power developed the mass of the flywheel having a radius of gyration 1.1m to restrict the fluctuation of speed to +1.5% of the mean speed. Demonstrate which would be most effective to reduce the fluctuation of speed, a change in diameter of or a change in mass of the flywheel.Each propeller of the twin-screw ship develops a full-speed thrust of F= 395 kN. In maneuvering the ship, one propeller is turning full speed ahead and the other full speed in reverse. What thrust P must each tug exert on the ship to counteract the effect of the ship's propellers? Assume a = 47 m, b = 118 m, C= 14 m.3 من إجمالي 3 60 80 N-m o 0.4 m 2 Problem 5: A commercial airliner with four jet engines, each producing 90 kN of forward thrust, is in a steady, level cruise when engine number 3 suddenly fails. Determine and locate the resultant of the three remaining engine thrust vectors. Treat this as a two dimensional problem. 90 kN 3 12 m 12 m 90 kN 9 m 90 kN Problem 6: Two rods and one cable are attached to the support at O. If two of the forces are as shown, determine the magnitude F and direction of the third force so that the resultant of the three forces is vertically downward with a magnitude of 1200 lb. 1000 Ib 500 Ib 45 30
- =↑ -7----- mg Sw mg 2. A drone of mass m (shown above) moves with a horizontal velocity v and is propelled by a thrust force ft produced from its propellers. To move, it tilts itself by an angle 0, which causes the thrust force ft to take on a component in the horizontal direction. This forward-directed force is indicated by ff in the diagram above. The drone is also subject to an aerodynamic drag force fa that acts in a horizontal direction and is proportional to forward velocity according to fa= -bv (regardless of 0). (a) Assuming ft acts along the inclined axis of the body, find ff as a function of the tilt angle and ft. (b) Find the necessary thrust ft needed to ensure that lift is balanced by gravity so that the drone does not move vertically. That is, find ft such that its vertical component as shown is equal to mg. Your answer will be a function of 0, g, and m. (c) Give the the small-angle approximations of these two functions when ≈ 0. (d) Suppose the drone has a mass m = 1 kg…Q/4 The arms of a Porter governor are equal in length and pivot on the axis of rotation. The mass of each ball is 10 kg and the mass of the central load is 25 kg. The ball rotates at radius 210 mm when the governor is at its lowest setting and 260 mm when it is at its maximum setting. At maximum speed, the vertical distance from the center of the sleeve to the pivot was 500 mm. For another case, it can be seen that the height of the governor will reduce to half values when the ball masses are replaced by three-time larger from the first case. The friction force for both cases is 10 N ; Calculate 1- Arms length L. 2-The range of speed in first case . 3-what will be the final range of speed .4-As a result of extracting the speed range values in both cases, what did you conclude?The car shown in the figure below has a mass of 1673 kg. The coefficient of static friction between the rubber tires and the pavement is 0.6. Determine the maximum incline e [degrees] that the car can drive up if it has rear-wheel drive. 0.85 m 1.2 m 1.7 m Answer: 18.87 Calculate the normal reaction force at the rear wheels for the condition of rear-wheel drive in N. Answer: