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Projectdesc - 16.810 Engineering Design and Rapid Prototyping Dept of Aeronautics Astronautics Massachusetts Institute of Technology IAP 2005 Prof

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16.810 IAP 2005 Engineering Design and Rapid Prototyping Dept. of Aeronautics & Astronautics Prof. O. de Weck Massachusetts Institute of Technology C. Graff, A. Bell December 31, 2004 Version 2.1 Design Project A hypothetical Indy racecar manufacturer seeks bids for a new wing design for their 2005/2006 model year vehicles. The rear-mounted wings are intended to maximize downward force (negative lift), while at the same time minimizing incremental drag and weight added to the vehicle. The wings have to conform to regulations (constraints) and be designed and manufactured in an economical fashion. Teams comprised of two students (one aerodynamicist, one structural engineer) will conceive, design, implement and operate a prototype wing and compete for the bid during a 4-week period in IAP 2005. I. Background The challenge for each Indy Car Team is the same every year. Design and develop a race car that is safe, durable, and competitive in different racing conditions (Fig.1 left). A major competitive element in race car design is efficient aerodynamic design [1,2,3]. Team designers consider aerodynamic efficiency to be the most important element in developing a competitive race car. Roughly speaking, aerodynamic design is concerned with two primary elements: reducing drag (D) and increasing downforce (negative lift, L). The principles, which allow aircraft to fly, are also applicable in car racing. The main difference being that the wing or airfoil shape is mounted upside down producing downforce instead of positive lift (Fig.1, right). D L Fig.1 : rear wing detail [3] Downforce is necessary in maintaining high speeds through the corners and forces the car to the track. In actual race car design there are complex interactions between the aerodynamics of the 1
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front wing, rear wing and the main chassis as all three main components (in addition to the tires) contribute to both drag and downforce. In this project we will focus on the isolated design of one component of the race car: the rear wing. II. Project Description The project for IAP 2005 is for the students to design and build a wing section, its supports, and then test the wing in the wind tunnel. The students will be given some boundary conditions and a nominal operating condition. The main focus is on carrying out an end-to-end conceive- design-implement-operate (CDIO) process and to learn from that experience. The maximum design envelope for the wing and its support structure is 20” x 20” x 40” (width, height, span). The wing model can be created as an extrusion of a 2D wing section, thus limiting the aerodynamic analysis to 2D section airfoils. There will be no taper or dihedral, thus simplifying the analysis further and allowing for easier manufacturing. However, taper or dihedral are not explicitly forbidden in the final design.
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This note was uploaded on 11/08/2011 for the course AERO 16.810 taught by Professor Olivierdeweck during the Winter '07 term at MIT.

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Projectdesc - 16.810 Engineering Design and Rapid Prototyping Dept of Aeronautics Astronautics Massachusetts Institute of Technology IAP 2005 Prof

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