Free Fuel with aerodynamics but ugly?
#1
05-23-2007, 10:59 AM
Free Fuel with aerodynamics but ugly?
my truck's available for free sample testing
if someone wants to build undercarriage pans for it....i'll supply the rivets, so you won't have to leave the screws exposed....
PHOTO CAPTION: Phil Knox's streamlined 1994 Toyota Tacoma pickup saw its fuel economy go from 25 mpg to 32 mpg at 70 mph just by improving its aerodynamics, reducing its Cd from 0.44 to 0.25, the same as the Honda Insight gasoline-electric hybrid.
http://www.evworld.com/article.cfm?storyid=870
http://www.mmiiccrroossoofftt.com/ideas/cars/cars1.htm
if someone wants to build undercarriage pans for it....i'll supply the rivets, so you won't have to leave the screws exposed....
PHOTO CAPTION: Phil Knox's streamlined 1994 Toyota Tacoma pickup saw its fuel economy go from 25 mpg to 32 mpg at 70 mph just by improving its aerodynamics, reducing its Cd from 0.44 to 0.25, the same as the Honda Insight gasoline-electric hybrid.
http://www.evworld.com/article.cfm?storyid=870
http://www.mmiiccrroossoofftt.com/ideas/cars/cars1.htm
Last edited by Maj Easy; 05-23-2007 at 11:29 AM.
#2
05-23-2007, 08:20 PM
Diesel Bomber
#4
05-23-2007, 09:24 PM
http://www.recumbents.com/car_aerodynamics/
Body pan notes:
A body pan fairs the underside of the vehicle. This becomes increasingly important as the vehicle gets closer to the ground. The pan ideally covers the entire underside of the car, but this may be impractical in many cases, so the idea is to make it as smooth as possible. Covering the exhaust system can lead to heat buildup between the belly pan and the floorboards. In general it's a good idea to create a heat shield/tunnel extending from the engine compartment to the rear of the vehicle. This will serve to seal in as much of the heat as possible. High pressure from the engine compartment will force air down the tunnel and out the rear of the car. Also, louvers may be cut into the body pan in areas where more heat needs to be released, such as along the route of the exhaust pipe. NACA ducts do not work well for this application as they are designed as devices to scavenge incoming air without disturbing the airflow, not as an air exhaust device. Engine airflow needs to be retained, but generally there are large enough opening between the engine compartment and the front wheels to give good engine airflow, even with the underside of the engine covered.
Be sure to make the areas where maintenance will occur easily accessible, especially oil pan drain and oil filter access. The belly pad should be parallel to the ground until just past the rear axle, then it should gradually curve upward to meet with the underside of the rear fascia of the car.
Even the most aerodynamic cars manufactured today, for example the Toyota Prius pictured here which is touted as having a full body pan, can be cleaned up extensively.
Body pan notes:
A body pan fairs the underside of the vehicle. This becomes increasingly important as the vehicle gets closer to the ground. The pan ideally covers the entire underside of the car, but this may be impractical in many cases, so the idea is to make it as smooth as possible. Covering the exhaust system can lead to heat buildup between the belly pan and the floorboards. In general it's a good idea to create a heat shield/tunnel extending from the engine compartment to the rear of the vehicle. This will serve to seal in as much of the heat as possible. High pressure from the engine compartment will force air down the tunnel and out the rear of the car. Also, louvers may be cut into the body pan in areas where more heat needs to be released, such as along the route of the exhaust pipe. NACA ducts do not work well for this application as they are designed as devices to scavenge incoming air without disturbing the airflow, not as an air exhaust device. Engine airflow needs to be retained, but generally there are large enough opening between the engine compartment and the front wheels to give good engine airflow, even with the underside of the engine covered.
Be sure to make the areas where maintenance will occur easily accessible, especially oil pan drain and oil filter access. The belly pad should be parallel to the ground until just past the rear axle, then it should gradually curve upward to meet with the underside of the rear fascia of the car.
Even the most aerodynamic cars manufactured today, for example the Toyota Prius pictured here which is touted as having a full body pan, can be cleaned up extensively.
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