EcoFins Silver Stick-on Vortex Generator Semi Truck Trailer Fuel Economy

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ECOFINS AIR FOILS FOR TRUCKS, TRAILER, RV'S AND MOTORHOMES<br>SILVER<br>Saves Up to<br>5%<br>in<br>FUEL<br>Improves handling<br>Less driver fatigue<br>Easy to Install in about an hour per truck or trailer<br>Pays for itself in<br>TWO to THREE MONTHS<br>(Estimate based on $2.50 per gallon fuel cost, 6 to 8 miles per gallon before install, 150,000 miles per year, a 2% improvement)<br>Dimensions: 4.5625" long X 3.125" wide X 1" high<br>Install three per foot on 4" centers for maximum<br>effectiveness<br>Requires about 80 per truck or trailer<br>Requires about 90 per truck or trailer with lower skirting<br>Requires about 50 per RV or Motorhome<br>Other colors available: White, Black,<br>Midnight Blue,<br>& Glow White (glows in the dark)<br>Custom colors are also available contact for information<br>ECOFINS™<br>help to reduce drag effect by spinning the air as it leaves the rear of the vehicle. Each vortex lasts several meters in length, keeping the airflow controlled and restricting it from becoming turbulent. This allows the vehicle to move forward more easily as it encounters less drag. The result is a reduction in required energy (fuel) to maintain the required speed.<br>Each EcoFin produces two counter rotating solid body vortices that rotate at approximately 3000 rpm. These vortices are about 4 to 5 inches in diameter and trail behind several meters. They help to reduce turbulence and suction drag at the tractor-trailer gap and at the rear of the trailer.<br>A lack of trailer streamlining causes a partial vacuum to form at the rear of the trailer at highway speeds. This causes turbulent air in the form of large vertical (swirling motion) eddies to tumble into the partial vacuum and the large alternating (swirling motion) eddies cause the trailer to sway. Disturbances from passing vehicles or obstacles tend to amplify these (swirling motion) eddies and increase the trailer’s tendency to sway, increasing driver work load and fatigue, increasing drag and<br>lowering fuel consumption<br>. Streamlining the trailer by tapering consumption would be the best solution but is not practical due to a necessary reduction in trailer capacity and massive changes to loading facilities.<br>The large square area at the trailer rear causes a partial vacuum to form as the vehicle moves through the air at speed. These are usually devices that physically alter the trailer rear by using inflatable sails, fiberglass boat tails or rigid metal panels that extend to taper the trailer rear. However, these devices can be cumbersome, expensive, heavy and prone to collision damage. Physically tapering the trailer or load would be the best solution but is not feasible due to trailer capacity and loading operations.<br>Installation Instructions<br>EcoFins<br>should be installed when vehicle is clean and skin temperatures are at or above +40F (+5C). The surfaces must be free of all contaminants.<br>EcoFins<br>should be installed on warm, clean, dry, flat surfaces. If a degreaser is used, it must be completely removed before installation. Regardless of the cleaning agent used, the final cleaning process should use a final cleaning agent such as rubbing alcohol or paint thinner.<br>DO NOT USE any window cleaners containing ammonia.<br>Use clean shop rags. For installation purposes, the cleaner, the dryer, the warmer, the better.<br>Location on Vehicles:<br>EcoFins<br>should be installed as close as possible to the back (trailing) edge of the vehicle. If the<br>EcoFins<br>must be moved forward to avoid rivet heads etc, keep the wide edges of the<br>EcoFins<br>within 12-18 inches<br>(30-45cm)<br>of the back for best performance.<br>EcoFins<br>are effective shielding gaps or reducing turbulence entering undesirable areas. Any vehicle component with an edge that is 90 degrees to the airflow is a possible<br>EcoFins<br>location provided that location receives an adequate supply of relatively undisturbed airflow. Examples: forward of wheel wells, hung tool boxes, trailer skirts etc.<br>EcoFins<br>are also effective on roof trailing edges of automobiles with a rear window slope exceeding 30 degrees. For<br>ALL<br>applications, ensure that the leading (wide) edge of the<br&