176 Pages · 3.39 mb ·
Steve Perry
Automotive
- © (Page 1) - MODEL SOLAR CAR (Page 1) - (Page 1) - (Page 1) - BY: IAN GARDNER © (Page 1) - MODEL SOLAR CAR DESIGN GUIDE (Page 2) - (Page 2) - CONTENTS (Page 2) - Part A: General solar car design 4 (Page 2) - Appendix H Model Solar Car Mathematical Simulator (instructions) 81 (Page 2) - Appendix N Solar Panel Maximum power voltage variations 154 (Page 2) - MODEL SOLAR CAR DESIGN GUIDE (Page 3) - REVISION 10 JAN. 2012 (Page 3) - PART A GENERAL SOLAR CAR DESIGN (Page 4) - (Page 32) - 17 AERODYNAMICS (Page 32) - Drag Force = ½ x Air Density x Drag coefficient x Area x Velocity squared (Page 32) - (Page 32) - There are only two parameters in this formula that you can work on. They are: (Page 32) - Drag coefficient, which is related to the shape of your car. Typically smooth rounded curves with an aerofoil type shape will give a low drag coefficient. Refer to texts for details but remember it takes a lot of effort and attention to detail to produce a car with a low drag coefficient. (Page 32) - Area, which is frontal area. The area that is pushed through the air as the car runs forward. (We will ignore the effect of wind which could be coming from any direction) Frontal area is relatively easy to control. Just make your car as small as possible within the regulations. If you can halve the frontal area you will halve the drag force. (Page 32) - (Page 32) - For a single lap race aerodynamic drag is a significant retarding force by the end of the race when the car velocity is high. For a two lap race the whole of the second lap is run at high speed making the aerodynamic drag even more important. (Page 32) - APPENDIX A: PERFORMANCE OF MOTOR AND PANEL (Page 33) - APPENDIX B: TRANSMISSIONS FOR SOLAR CARS (Page 37) - DIRECT DRIVE: (Page 38) - APPENDIX C: DATA ON MATERIAL PROPERTIES (Page 39) - APPENDIX D: SPECIFICATIONS OF YOUR CAR (Page 40) - APPENDIX E: CAR PERFORMANCE (Page 41) - PHOTON CRUNCHER Mk. IV 8/05 (Page 46) - OTHER COMPONENTS: (Page 54) - (Page 64) - (Page 64) - (Page 65) - (Page 65) - FROM LEFT TO RIGHT (Page 67) - APPENDIX F (Page 70) - POWER TESTING OF SOLAR PANELS (Page 70) - (Page 81) - MODEL SOLAR CAR (Page 81) - (Page 81) - (Page 81) - MATHEMATICAL SIMULATION (Page 81) - (Page 81) - (Page 81) - (Page 81) - BY (Page 81) - IAN GARDNER (Page 81) - IMPORTANT: ACCURATE INPUT DATA IS CRITICAL FOR OUTPUT (Page 82) - SECTION 1 (Page 83) - 1 GRAVITY (Page 83) - 2 AIR DRAG (Page 84) - THE CALCULATIONS (Page 95) - (Page 97) - Below is a sketch of the track showing the distances over which we have allowed the variable forces to act (Page 97) - SECTION 3 (Page 98) - SECTION 4 (Page 101) - DETAILS OF RESULTS DISPLAYED (Page 104) - (Page 107) - TESTS ON PHOTON CRUNCHER MK IV (Page 107) - (Page 120) - (Page 120) - (Page 120) - RESULTS FOR SOLAREX SX 10 PANEL: (Page 120) - (9.8 W at 100% Sun) (Page 120) - RESULTS FOR 9 DICK SMITH SEGMENTS: (Page 121) - RESULTS FOR 10 DICK SMITH SEGMENTS: (Page 121) - RESULTS FOR 11 DICK SMITH SEGMENTS: (Page 121) - (Page 122) - (Page 122) - RESULTS FOR 12 DICK SMITH SEGMENTS: (Page 122)