Where C L is the lift coefficient of the vehicle, based on its frontal area. There is no simple and direct relationship between the two forces as it really depends on how the lift force is created, but equation (4) can be used to make a crude estimate: C D lift a drag force is created (which has to be overcome with engine power). When the vehicle is subjected to a lift force or a downforce, The second one is the lift-induced drag ( C D lift). It is treated like a drag rating as presented above.
Race car dynamics calculator windows#
The first one is for body without a closed cockpit, such as race car with open windows or open cockpit.
Two other sources of drag can be identified, especially for race cars. The coefficient C depends on the fender and hubcap design, as follow: Fender typeįender covers entirely the wheel (Full fender)įender doesn't cover side, wheel has flush hubcap Decades of Motorsport VictoriesPerformance for Every NeedWorld-Class ECU Tuning State of the Art DynamometersDieselTRONIC Tuning BoxClick HerePowerTRONIC Piggyback ECUClick Here Previous Next PERFORMANCE PRODUCTS PowerTRONIC PowerTRONIC DieselTRONIC FuelX Autotune PowerTUNE R200 ESSENTIALS FlashX Balaclava Merchendise TEST SYSTEMS DYNAMOMETERS FUEL FLOW METER VTPMS ELECTRONIC SPEED GOVERNER. Where W is the width of the tire and D is its diameter (see TIRE SIZE for more info). The drag coefficient (based on the frontal area of the vehicle) for EACH wheel can be estimated by: C D wheel
Race car dynamics calculator skin#
The skin friction and internal flow are treated like all other drag ratings. ( skin friction, internal flow and the drag from all wheels ( C D wheels)) such that equation (1) becomes: C D = The method adds the drag rating for only the first nine areas presented above, and the sum is put in equation (1): C D =īased on that work, equation (1) was modified such that the base factor (0.16) could be detailed. (p336-338), which gives a drag rating (the number under each figure) for shapes of different areas of a car body. The drag coefficient ( C D) can be estimated with a method presented in Handbook of Vehicle Design Analysis Drag coefficient is at the bottom of your screen. Some parts use a different approach than other books.C D = 0.347 C DA = 7.83 ft² C LA = 3.38 ft² Drag & lift coefficients For each category, select the most appropriate choice for your vehicle. Antonino Pizzuto, Head of Chassis Development Group at Hyundai Motor Europe Technical CenterĪstonishingly good! Everything is described in a very compelling and complete way. We are now using part of its theory on a daily basis to constantly improve ride and handling performances. Great book! It has changed drastically our approach on many topics. The book deals with several relevant topics in vehicle dynamics that are not discussed elsewhere and this new edition includes thoroughly revised chapters, with new developments, and many worked exercises. The reader will soon achieve a clear understanding of the subject, which will be of great help both in dealing with the challenges of designing and testing new vehicles and in tackling new research topics. This innovative approach provides a deep, yet simple, analysis of the dynamics of vehicles. Mathematical models of vehicles are developed always paying attention to state the relevant assumptions and to provide explanations for each step. This textbook covers handling and performance of both road and race cars.
0 kommentar(er)
