Engineering design Research Paper Example | Topics and Well Written Essays - 2500 words

Engineering design - Research Paper Example The ease of accommodating the power source can also be increased by carefully selecting a location for installing the source. The largest dimensions are of Honda GX 35 i.e. 7.8† ? 9.8† ? 12.7†. The calculations of the resistive forces are very simple because the only resistive force to the motion of the bicycle is the frictional force (Wormell). The frictional force can be coupled with the gravitational force while the bicycle is travelling on an inclined surface. For an inclined surface we can assume an angle of 4-8 degrees at the tourist resort at roads where the bike can travel. We will do the calculations for 8o inclined plane. Pr =  µs FN + W sin ? Where Pr is the total resistive force  µs is the coefficient of friction taken as 0.005 for bicycle tyres FN is the normal force equal to the weight (mg) of the bicycle and the driver W is the combined weight of the bicycle and the driver = mg (mass ? gravitational acceleration) ? is the angle of inclination of t he road = 8o Assuming the driver mass to be 80 kg and the total mass of the bike to be 20 kg we can calculate the total resistive force: Pr =  µs FN + W sin ? = 0.005 ? 100 ? 9.81 + 100 ? 9.81 ? sin 8o Pr = 141.43 N In order to calculate the torque required by the motor/engine to produce we have to assume the diameter of the tyre of the bicycle. The average diameter ranges from 55cm to 70 cm. Taking d =70 cm Tr= Pr ? 0.35 m Tr= 49.5 N m The power rating required will be Power = Tr ? 2?N/60 (N = 50) Power = 260 W The power rating of motors and engines provide a factor of safety of more than 5 as the power required is 260 W. The power rating of the battery can be computed by employing the following calculations: Average speed of the bike = 15 mph Maximum Distance to be travelled = 50 miles Discharging time of the battery = 3.3 hrs Power rating of battery = 45 A ? 3.3 hr = 150 Ahr 7. Produce a detailed PDS based on quantified data The manufacturing process is based on a detailed PDS (Musharavati). The various relevant elements of PDS for the product are mentioned below: 1. Function and Performance: The function of the product is to provide an environment friendly means of transport for tourists in a countryside resort. The performance is enhanced by proposing solutions which can provide means of transport with minimum exhaust. 2. Environment: The product is environment friendly because there is no exhaust and thus no addition of harmful chemical compounds to the environment. The design will be in accordance with the emission standards like euro 3 and USEPA. 3. Ergonomics: While developing the product ergonomic principles are kept in mind according and the design will be carried out according to the ergonomics principles. The ergonomics are mainly concerned with the position of the seat, foot rest and paddles and the convenience in the operation of control mechanism. The overall weight of the bicycle should not be greater than 30 kg. 4. Safety: The safety is ver y important and the safety and protection guidelines according to the manufacturing standards provided by ASME and ASTM. 5. Materials: The selection of materials should be done according to the ease of use and feasibility of manufacturing according to the local conditions. The proposed materials are aluminium and iron. 6. Competition: The product under consideration i.e. the environment