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1. The Drag Coefficient
- www.grc.nasa.gov
- The drag coefficient is a number that aerodynamicists use to model all of the complex dependencies of shape, inclination, and flow conditions on aircraft drag. This equation is simply a rearrangement of the drag equation where we solve for the drag coefficient in terms of the other variables. The drag coefficient Cd is equal to the drag D divided by the quantity: density r times half the velocity V squared times the reference area A. ...
- The drag coefficient then expresses the ratio of the drag force to the force produced by the dynamic pressure times the area. ...
- This equation gives us a way to determine a value for the drag coefficient. In a controlled environment (wind tunnel) we can set the velocity, density, and area and measure the drag produced. Through division we arrive at a value for the drag coefficient. As pointed out on the drag equation slide, the choice of reference area (wing area, frontal area, surface area,. ... ) will affect the actual numerical value of the drag coefficient that is calculated. When reporting drag coefficient values, it is important to specify the reference area that is used to determine the coefficient. We can predict the drag that will be produced under a different set of velocity, density (altitude), and area conditions using the drag equation.
- The drag coefficient contains not only the complex dependencies of object shape and inclination, but also the effects of air viscosity and compressibility. To correctly use the drag coefficient, we must be sure that the viscosity and compressibility effects are the same between our measured case and the predicted case. ... At supersonic speeds, shock waves will be present in the flow field and we must be sure to account for the wave drag in the drag coefficient. So it is completely incorrect to measure a drag coefficient at some low speed (say 200 mph) and apply that drag coefficient at twice the speed of sound (approximately 1,400 mph, Mach = 2. ... In our discussions on the sources of drag, recall that skin friction drag depends directly on the viscous interaction of the object and the flow. ... If they are very different, we do not correctly model the physics of the real problem and will predict an incorrect drag.
2. SMOoOTH DRAG *** Can Stop Anything ***
- www.smoothdrag.com
- Smooooth Drag Installation Instructions .
- Replacement Drag Washers .
- SMOOOOOTH DRAG produces an extensive selection of replacement drag washers for Penn, Penn International, Daiwa and Ambassadeur reels.
- Largest fish ever taken on Smooth Drag, Carns Australia 1990. ... This was 1 of 9 thousand pound or larger taken on one set of 130 international drag washers super smoothies.
- Smooooth Drag Installation Instructions .
- SMOOOOOTH DRAG produces an extensive selection of replacement drag washers for Penn, Penn International, Daiwa, Ambassadeur, Shimano and Fin-Nor reels. ...
- New! "Xtreme Smoothies" are our newest drags, offering the finest performing drag washer friction material available today. Xtreme Smoothies provide xtreme smoothness and xtreme durability, with the greatest range of drag progression. ... Xtreme Smoothies are our longest lasting drag. ...
- The "Super Smooooothie" rubber and zinc compound is used in our production of the Penn International drag washers. The washer material is cut to exact specifications that will allow your reel to go in to, and have a free spool, and also allow for maximum drag adjustment. ...
- SMOOOOOTH DRAG also produces metal washers as a compliment to any of our drag washers. ... These are available for popular star drag reel models. ...
- This new metal top drive plate for Shimano Trinidad reels provides even, consistent pressure to the drag stack, eliminating uneven and inconsistent drag settings. The plate is precision machined (by Cal's 2 Speed Reel Conversions) to distribute the pressure to the outside of the drag stack, is made of high quality stainless steel, with a rockwell hardness of 32, which will eliminate any flexing of the plate away from the drag washers. We recommend our Xtreme Smoothie drag washers in conjunction with the new drive plate for excellent drag performance and the highest drag settings available for your Trinidad reels.
3. Drag Bingo
- www.dragbingo.com
- About Drag Bingo .
- History of Drag Bingo.
- What is Drag Bingo?.
- Drag Tip of the Month.
- You May be a Drag Queen.
- Join Drag Bingo's E-mail .
- I further swear that BINGO is just a stupid game, but I will continue to play DRAG BINGO until this crisis is over.
- Next Drag Bingo.
- To all of the Bingo Heroes who purchased tickets for the January 22nd Drag Bingo We appreciate your continued support of Drag Bingo, we know that we could not do this event without you. If you purchased tickets for the January 22nd Drag Bingo, hang on to them!!!! They can be used for ANY of the 2005 Drag Bingo events. ...
4. Aerodynamic Drag, Data for Airfoils, Wings, Aircraft, Automobiles
- aerodyn.org
- Drag Coefficients.
- Drag coefficients (CD) in aerodynamics are drag forces normalized with a reference area, usually the frontal area, another projection area or the wetted area. Sometimes the reference area is not given, so the drag coefficient is a misleading figure. ... The drag force, instead, is more clearly identified. ...
- Table 2 is a summary of typical drag coefficients of streamlined bodies. Table 3 is a summary of drag data for airborne systems and road vehicles. Table 4 reports a summary of drag data for a human being performing some well known physical activities. Table 5 reports drag coefficients and total drag forces for some automobiles. ...
- Table 1: Drag Coefficients for bluff bodies Rough Shere (Re=) .
- Table 2: drag coeffs for streamlined bodies Laminar flat plate (Re=).
- Table 3: drag coeffs for transport systems Subsonic Transport Aircraft .
- Table 4: drag coeffs of Human Man (upright position) .
- Table 5: Drag coefficients for some passenger vehicles Vehicle (class) CD CD × A (m²).
- Table 6: drag coeffs of other systems Wires and cables .
- 4 It is the drag coefficient for a helicopter in hover; depends on the type of fuselage and the number and type of free standing sub-parts (stubs, nacelles, wings, fuel tanks, weapons, etc. ...
- Drag levels of Fixed and Rotary Wing Aircraft .
5. Straightliners home of Run What You Brung Motorcycle Racing in the UK
- www.straightliners.co.uk
- Home of Run What You Brung Motorcycle Drag Racing in the UK.
- Ever wanted to Drag Race your Motorcycle? Now you can with Straightliners. Visit one of our many Drag Race events across the UK, or enter into the entire series. ...
- Think you've got what it takes to be the fastest, quickest, meanest speed merchant on the track? Drag race that bike against other speed demons like yourself to find out!.
- Got a Harley Davidson, Buell, Vintage or Classic motorycle? You can drag race these too at one of our events. ...
- Straightliners specialise in running Motorcycle Drag Racing events for every type of bike, including Buell, Harley Davidson, Vintage and Classic bikes. ... The main Straightliners Drag Racing events cater for all types of motorcycles, be it a Yamaha / Honda / Suzuki / Ducati sports bike mean machine, or a clapped out old rat bike or monkey bike (as long as it passes the drag race safety martials checks of course!). The drag race events are held throughout the UK, including Esholt Park, Avon Park, East Kirkby, the Isle of Man (Ramsey and Jurby), Santa Pod, York Raceway, Waterbeach and North Weald.
- We also run the American Motrcycle Drag Challenge, sponsored by Just Harleys and the Vintage and Classic series, sponsored by Classic Bike Guide. ... We put on two drag races during the TT week, both on Ramsey promenade. So if your on the Island during the TT week, pop on out to Ramsey and take part in the great Drag Racing scene that goes on there!.
- Also, at every drag racing event, you'll see the stunt show. The best motorcycle stunt riders in the UK will put on a spectacular show of extreme bike stunts! People like Dave Coates, Sonnie Ferguson, Jason Finn and Terry Grant will show you how to do stoppies, wheelies, and stunts that you just have to see to beleave! Enjoy the pause in the drag racing by cheering our stunt team on. ...
- Inside the site, you'll find Straightliners drag racing photo's and picture's, write ups on the Streetfighter style drag bikes and the people that ride them, news on the Straightliners / Streetfighters scene, articles on the stunt bike riders and their bikes, rules and regulations, results and times for all the rounds (going back to 1997), Straightliners Merchandise, message boards and links to other Straightliners / Streetfighters orientated web sites.
- So what are you waiting for? Come on in and join the fun with Straightliners Motorcycle Drag Racing.
6. Race Tech 102: Aerodynamic Drag
- www.insideracingtechnology.com
- Aerodynamic Drag.
- Just as airplane engines are needed to overcome the drag of the plane, a racecar engine has to overcome the drag of the car, including the wings.
- Aerodynamic drag = 1/2 D x A x Vsquared.
- For real body shapes, air at standard conditions, V in mph, and drag in pounds of force, this equation becomes:.
- Drag = 1/391 x Cd x A x Vsquared.
- This equation shows that to calculate drag you need to know three things: Cd, the drag coefficient; A, the frontal area of whatever youre driving through the air; and the speed of air past it. ... That means you quadruple the drag or lift when you double the speed.
- The drag coefficient, Cd, is important because, in concert with frontal area, it determines the power cost of pushing a shape through air at a certain speed. ...
- Here are measured drag coefficients for some basic shapes. ...
7. Drag World USA, Vintage Drag Racing Literature, Diecast and Apparel & collectibles !
- www.dragworldusa.com
- Welcome to Larry Smith's DRAG WORLD USA .
- VINTAGE DRAG RACING LITERATURE, .
- Drag Sport Illustrators: .
- Last Update: Tuesday, 01-14-05 00:30:00 CDT CONTACT Drag World USA/ORDER PAGE .
- Drag Racing Magazines and Books .
- Drag Car Restorations .
8. Welcome to the Melbourne Drag Web Pages for the best in Female Impersonation and Drag Queen information. ....
- www.melbournedrag.com
- Melbourne Drag presents the best of Melbourne's Drag Entertainment. ...
- For the true drag enthusiast we have a tribute to the unsung heros and heroines of drag - the costume makers, and we will entertain you with Melbourne's drag history.
- Miss Melbourne Drag 2004.
- If you are interested in 'doing drag' we can tell you all you need to know and we can tell you about the best shopping in Melbourne to help you do it. ...
- Enjoy the best of Melbourne Drag.
- Melbourne Drag especially thanks Leigh Klooger and Focus Magazine for images on this web site. ...
9. The Drag Force on a Sphere
- www.ma.iup.edu
- The Drag Force on a Sphere.
- Adapted from UMAP Module 712, The Drag Force on a Sphere (UMAP Journal, Volume 12, no. ...
- The Graph of the Drag Coefficient verses Reynolds Number.
- Two Models for the Drag Force.
10. Air resistance
- carini.physics.indiana.edu
- Air resistance: the drag force.
- drag (or air resistance): the frictional force from the air that resists the forward motion of the object. ...
- spin-related forces: these result from the interaction of the rotation of the object and the motion through the air We'll consider drag first it's somewhat simpler, but also we cannot understand the spin effects without understanding drag . Drag.
- All objects moving through the air experience drag, and the drag force plays a crucial role in all speed-related sports and all sports involving projectile motion. The drag force produced by the motion through water is the most important force in swimming as well and can be understood using the same ideas and formulas that is why we use the word "fluid" below, which can be a gas or a liquid . ...
- In your video analysis you already saw several examples of the effect of the drag force on a basketball. ... This acceleration was produced by the drag force. The drag force can also affect vertical motion: it is responsible for slowing down and bringing to earth gently skydivers with parachutes, for example. ...
- The drag force is more the result of an imbalance of pressures than the direct result of the viscous force. ...
- This is what happens in the drag force: the pressure in front of a moving object is somewhat greater than the pressure behind the object and the difference produces a net force that opposes the motion of the object through the air. ...
- Although all of this sounds complicated, the strength of this force is given by a simple formula: D=(1/2)*CD*A*r*V2 where CD is called the drag coefficient, which is a number that depends on the shape of the object for a smooth sphere, CD~0. ...
- Example of a drag force calculation. Let's try to estimate the drag force and acceleration on a basketball tossed horizontally with a speed of 8 m/s. ...
- Here the drag force is significant, but not as great as the weight of the ball: D/W = (0. ...
- "Action at a distance"Straight downW=m*gupward force on center of earth Normal (N)Acts at point of contact between two objectsPerpendicular to the contact surfaceVariable strengthNormal force on the other object Kinetic friction (K)Contact force, acts at point of contact parallel to contact surfacesOpposite direction of slidingK=mk*NKinetic friction on other object Static friction (S)Contact force, acts at point of contact parallel to contact surfacesVariable: Opposes slippingVariable strength, Smax=ms*NStatic friction on other object Drag force (D)Acts on objects moving.
11. Performance Trends - drag racing circle track road racing engine suspension software
- www.performancetrends.com
- Update (Oct 27, 2002): Drag Racing Analyzer v3. ...
- Update (June 20, 2002): Drag Race DataMite v3. ...
- Performance Trends started in 1986 with the release of our popular Drag Racing Analyzer computer program, quickly followed by the Engine Analyzer. ...
- Current products include engine simulation software, drag racing simulation software, circle track simulation software, suspension simulation software, flow bench software, flow bench electronics, flow bench swirl meters, flow bench tumble meters, EZ Flow flow bench systems, valve spring testers, retro-fit kits to computerize your Rimac spring tester, fuel economy software, gear selection software, pit stop fuel mileage software, practice tree software, cam measurement software, cam measurement systems, compression ratio software, dynamometer data acquisition (data loggers), drag race data acquisition (data loggers), circle track data acquisition (data loggers), road race data acquisition (data loggers), 4 link suspension software, and more. ...
12. Lift and Drag
- home.hccnet.nl
- 2812 21 5,65 pt 5,65 pt 4 4 Lift and Drag.
- Maybe already twenty years ago the question was raised to what extend lift or drag forces propelled the rowing boat. ... Below the nature of lift and drag will be explained, set in perspective and lift and drag coefficients are presented.
- 2 Basics of lift and drag.
- Discussion of lift and drag starts usually with the introduction of an airfoil. ...
- FD is the drag force, the resistance to be balanced by the propulsion force generated by the engines. The net power required is the product of drag force times flow velocity. The lift and drag forces are expressed as:.
- FL and FD = lift and drag force.
- CL and CD = lift and drag coefficient.
- When not an airfoil but a flat surface with zero thickness is placed in a flow a lift and drag force can be distinguished as well.
- the distinction between lift and drag is not of a physical nature but it is a functional one (carrying and resisting) or a geometrical one (perpendicular and parallel to the flow direction) but the observation made before that the lift force does not do work is of importance. ...
- Otherwise than in the case of a wing of an airplane the direction of the lift and drag force has no functional meaning. ...
- Atkinson presents on his website values for CD and CL as a function of the angle of attack as taken from Hörner's "Fluid Dynamic Drag" for a flat plate. ...
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