A Solar Car Primer: A Guide to the Design and Construction by Eric Forsta Thacher PDF
By Eric Forsta Thacher
This fascinating primer on sun Racing actually begins from the floor up, describing how the interactions of a car with its setting circumscribe its final luck, from aerodynamics to resistance and propulsion. by means of demonstrating how you can mathematically version those underlying actual phenomena, the writer is helping sunlight racing rivals rigorously opt for key features of the car, reminiscent of weight and form, to supply optimum velocity. power conversion and insist are given specific recognition, through chapters dedicated to analyzing sun racers’ layout, manufacture and trying out utilizing a based problem-solving method to maintain initiatives on course and on agenda. A bankruptcy dedicated to power administration ideas offers beneficial tips about maximizing general pace in the course of a race. complicated concerns resembling air flow approach research and function simulation are lined in committed appendices. The monetary point of venture layout isn't ignored, as either fund-raising and price estimation are given in-depth consideration.
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Additional info for A Solar Car Primer: A Guide to the Design and Construction of Solar-Powered Racing Vehicles
3 If the car were moving through water, the viscosity of which is about 48 times that of air at 25 °C, the frictional drag would be much larger at a given speed (remember the honey). Near atmospheric pressure, the viscosity of air shows a weak tendency to Fig. 2 Boundary layer and aerodynamic forces Many fluids obey this relation between the surface shear force and the velocity gradient, air and water, for instance. Such fluids are called newtonian, after Sir Isaac Newton, who first proposed this linear model.
In the first US cross-country solar car race, the solar cars were required to show that they could climb a 10 % (rise/run times 100) grade. 11 This deformed shape is typical of the small, high pressure, rounded-cross section tires usually used by solar racers. 16 Rolling Resistance 25 Fig. 10 Forces and moments on a wheel We assume that the drag on the wheel caused by the flow over the car is accounted for in vehicle drag and focus on the drag resisting the wheel’s rotation around its axis. A moment, DM, about the wheel’s axis opposing the wheel’s rotation is imposed by the drag force created by the rotation of the wheel.
This is exactly the situation when the aerodynamic forces are measured in a wind tunnel, for instance. When it is more convenient, we will revert to thinking of the car as moving with respect to a coordinate system fixed to the earth, such as at the starting line at the Indianapolis Motor Speedway. 1 Within specified design limits; absolute stability cannot be achieved. 4 Aerodynamic Interactions 7 Fig. 4 Aerodynamic Interactions We will select the point of action of aerodynamic forces as the center of gravity of the vehicle.
A Solar Car Primer: A Guide to the Design and Construction of Solar-Powered Racing Vehicles by Eric Forsta Thacher