The gear reduction unit and propeller of an outboard boat motor are shown in the following...
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The gear reduction unit and propeller of an outboard boat motor are shown in the following figure. This assembly is attached to the structure of the boat through the top "mounting Flange". The motor is mounted above this unit and rotates the "vertical drive shaft" with a torque of 26 Nm. By means of bevel gearing, this shaft turns the "propeller" at a rotational speed that is one third the rotational speed of the vertical shaft. The propeller provides a thrust of 490 N to drive the boat forward. Neglecting the effects of gravity and friction, identify all the external "loads" (i.e. Forces and Torques/Moments) acting on the mounting flange. (In particular, you need to find: FMFX, FMFY, FMF2, MMFX, MMFY, and TMFZ). Also, draw a "Free Body Diagram" of this assembly showing the "loads" acting on it with their correct directions. (Note: The subscript "MF" used in the identification of the "loads" stands for "Mounting Flange". Vertical drive shaft Mounting flange 500 mm Propeller rotation. 150 mm Rotation Foward direction of boat travel 3:1 bevel gears are inside this housing Ans. FMFx = 490 N, FMF,0, FMF, = 0, MMFx 78 Nm, MMFY = 245 Nm, TMF =26 Nm The gear reduction unit and propeller of an outboard boat motor are shown in the following figure. This assembly is attached to the structure of the boat through the top "mounting Flange". The motor is mounted above this unit and rotates the "vertical drive shaft" with a torque of 26 Nm. By means of bevel gearing, this shaft turns the "propeller" at a rotational speed that is one third the rotational speed of the vertical shaft. The propeller provides a thrust of 490 N to drive the boat forward. Neglecting the effects of gravity and friction, identify all the external "loads" (i.e. Forces and Torques/Moments) acting on the mounting flange. (In particular, you need to find: FMFX, FMFY, FMF2, MMFX, MMFY, and TMFZ). Also, draw a "Free Body Diagram" of this assembly showing the "loads" acting on it with their correct directions. (Note: The subscript "MF" used in the identification of the "loads" stands for "Mounting Flange". Vertical drive shaft Mounting flange 500 mm Propeller rotation. 150 mm Rotation Foward direction of boat travel 3:1 bevel gears are inside this housing Ans. FMFx = 490 N, FMF,0, FMF, = 0, MMFx 78 Nm, MMFY = 245 Nm, TMF =26 Nm
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the lower unit of an outboard boat motor 1 The lower unit is responsible for transferring power from the engine to the propeller and it houses two key components Gear reduction unit This unit reduces ... View the full answer
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Income Tax Fundamentals 2013
ISBN: 9781285586618
31st Edition
Authors: Gerald E. Whittenburg, Martha Altus Buller, Steven L Gill
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