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Figure shows a mechanism that operates the landing gear in a small airplane. Use the Working...
1. Given the mechanism parameters below for the nose landing gear of an airplane, answer the...
1. Given the mechanism parameters below for the nose landing gear of an airplane, answer the following What is the Grashof mechanism type? what are the values for θ4 and θ3? Assume the 12" link is the input link. Measure angles with respect to the ine between the me Find the location of the bottom of the wheel assuming (0,0) is at the fixed joint of the input link. a. b. evo u ints C. 32" 15° 5" 12" 26"...
Design Problem Design a speed reducer gear box that will take 1.5 kW power from an...
Design Problem Design a speed reducer gear box that will take 1.5 kW power from an electric motor rotating at 3000 rpm (clockwise) and deliver it to a machine which operates at 2 different speeds, 1000 rpm (clockwise) and 500 rpm (counter-clockwise). Use Spur Gears with 20° pressure angle and 5mm module. Gear box should be of smallest possible size. The gear shift mechanism is not the part of the design A 2-speed double-reduction speed reducer is shown in the...
Question 2 (a) A small electric vehicle is propelled by a motor with the performance data...
Question 2 (a) A small electric vehicle is propelled by a motor with the performance data shown in Figure Q2 below. The motor drives a gear with 12 teeth, which in turn drives a larger gear, which is attached to the vehicle's driving wheels. The diameter of the driving wheels is 380 mm and the vehicle is designed for a speed of 30 km/h. (Note: Errors of +10% in reading data from the graphs are acceptable for the purposes of...
Question 3: DC motors can be simplistically modeled as shown in Figure 5 MoTor back emf Vi: +1 Re...
Question 3: DC motors can be simplistically modeled as shown in Figure 5 MoTor back emf Vi: +1 Resistor Ra Ia Figure 5: Simplified model of DC Motor (a) Write the three characteristic equations that determine the behavior of the DC motor. Denote torque constant and speed constant as Ka, K, respectively. (b) Motor parameters are the quantities that define the behavior of the motor. List the motor parameters from the described model. What are their units? (c) For given...
Figure Q1 shows a gear train consists of four spur gears A, B, C and D to be designed for a specific mechanism. The power transmitted by gear A is 5 kW at rotational speed of 720 rpm counterclockwise direction. Number of teeth (N) for gears A,B,C and D ar
Figure Q1 shows a gear train consists of four spur gears A, B, C and D to be designed for a specific
mechanism. The power transmitted by gear A is 5 kW at rotational speed of 720 rpm
counterclockwise direction. Number of teeth (N) for gears A,B,C and D are respectively 20, 50,
30 and 60. The module and pressure angle of the gears are respectively 4 mm and 20o
. Determine
followings:
(a) Tangential and radial forces between gears...
2) (120 pts) After successfully landing on the planet Mars, some scientists want to experimentally test the compressor mechanism given below. The compressor mechanism shown below is driven clockw...
2) (120 pts) After successfully landing on the planet Mars, some scientists want to experimentally test the compressor mechanism given below. The compressor mechanism shown below is driven clockwise by a DC electric motor at a constant rate of 800 rpm, and accelerating at 1000 rad/s'. In the position shown, the cylinder pressure is 70 psi, and the plston weighs 2 lb. The coefficient of friction between the piston and the compressor cylinder is 0.5. The weight of all other...
An ideal gas refrigeration system operates with air as the working fluid. Air is at 100...
An ideal gas refrigeration system operates with air as the working fluid. Air is at 100 kPa and 20°C before compression and 500 kPa and 30°C before expansion. The system is to provide 15 kW of cooling. Calculate the rate at which air is circulated in this system, as well as the rates of heat addition and rejection. Use constant specific heats at room temperature.
Figure 1 shows the layout of countershaft used to transmit power to a blower through a...
Figure 1 shows the layout of countershaft used to transmit power to a blower through a pulley drive (4-5). Pulley (driving sheave) 4 has a diameter of 125-mm and pulley (driven sheave) 5 has a diameter of 75 mm. Pulley 5 is mounted vertically below pulley 4 (as shown in the figure). Belt tension on the loose side is 20% of the tension on the tight side. A power of 7.5 kW is transmitted via the gear set (2-3) from...
Figure Pl 1-12 shows an oil field pump mechanism. The head of the rocker arm is...
Figure Pl 1-12 shows an oil field pump mechanism. The head of the rocker arm is shaped such that the lower end of a flexible cable attached to it will always be directly over the well head regardless of the position of the rocker arm 4. The pump rod, which connects to the pump in the well casing, is connected to the lower end of the cable. The force in the pump rod on the up stroke is 2970 lb...
(b) Figure Q3 shows a design of a plumbing system to be used in a new building. Water at 20°C is ...
(b) Figure Q3 shows a design of a plumbing system to be used in a new building. Water at 20°C is free to be pumped from reservoir A to another reservoir B at a higher elevation through two 30 m long pipes connected in parallel on a common elevation level. The difference between the water surface elevations is 10 m. The pipes are made of commercial brass and the diameters of the two pipes are 4 cm and 8 cm....
1. Given the mechanism parameters below for the nose landing gear of an airplane, answer the following What is the Grashof mechanism type? what are the values for θ4 and θ3? Assume the 12" link is the input link. Measure angles with respect to the ine between the me Find the location of the bottom of the wheel assuming (0,0) is at the fixed joint of the input link. a. b. evo u ints C. 32" 15° 5" 12" 26"...
Design Problem Design a speed reducer gear box that will take 1.5 kW power from an electric motor rotating at 3000 rpm (clockwise) and deliver it to a machine which operates at 2 different speeds, 1000 rpm (clockwise) and 500 rpm (counter-clockwise). Use Spur Gears with 20° pressure angle and 5mm module. Gear box should be of smallest possible size. The gear shift mechanism is not the part of the design A 2-speed double-reduction speed reducer is shown in the...
Question 2 (a) A small electric vehicle is propelled by a motor with the performance data shown in Figure Q2 below. The motor drives a gear with 12 teeth, which in turn drives a larger gear, which is attached to the vehicle's driving wheels. The diameter of the driving wheels is 380 mm and the vehicle is designed for a speed of 30 km/h. (Note: Errors of +10% in reading data from the graphs are acceptable for the purposes of...
Question 3: DC motors can be simplistically modeled as shown in Figure 5 MoTor back emf Vi: +1 Resistor Ra Ia Figure 5: Simplified model of DC Motor (a) Write the three characteristic equations that determine the behavior of the DC motor. Denote torque constant and speed constant as Ka, K, respectively. (b) Motor parameters are the quantities that define the behavior of the motor. List the motor parameters from the described model. What are their units? (c) For given...
2) (120 pts) After successfully landing on the planet Mars, some scientists want to experimentally test the compressor mechanism given below. The compressor mechanism shown below is driven clockwise by a DC electric motor at a constant rate of 800 rpm, and accelerating at 1000 rad/s'. In the position shown, the cylinder pressure is 70 psi, and the plston weighs 2 lb. The coefficient of friction between the piston and the compressor cylinder is 0.5. The weight of all other...
Figure 1 shows the layout of countershaft used to transmit power to a blower through a pulley drive (4-5). Pulley (driving sheave) 4 has a diameter of 125-mm and pulley (driven sheave) 5 has a diameter of 75 mm. Pulley 5 is mounted vertically below pulley 4 (as shown in the figure). Belt tension on the loose side is 20% of the tension on the tight side. A power of 7.5 kW is transmitted via the gear set (2-3) from...
Figure Pl 1-12 shows an oil field pump mechanism. The head of the rocker arm is shaped such that the lower end of a flexible cable attached to it will always be directly over the well head regardless of the position of the rocker arm 4. The pump rod, which connects to the pump in the well casing, is connected to the lower end of the cable. The force in the pump rod on the up stroke is 2970 lb...
(b) Figure Q3 shows a design of a plumbing system to be used in a new building. Water at 20°C is free to be pumped from reservoir A to another reservoir B at a higher elevation through two 30 m long pipes connected in parallel on a common elevation level. The difference between the water surface elevations is 10 m. The pipes are made of commercial brass and the diameters of the two pipes are 4 cm and 8 cm....
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