Tom said:I can't imagine a 4" (4 inch) deflector having any measurable impact on drag, fuel economy or anything else. Do you mean a 4 foot deflector?
Tom said:There's a big difference between one 4" deflector and 50-100 of them? ? I can't imaging attaching all those things to my RV. If nothing else, it would look quite ugly.
w5blt said:I don't believe that I said that you only needed one of them.
This thing that I'm talking about is an "air disruptor". It's plastic, about 4" square with specific molding on it.
Tom said:Translate that to hp, mpg, or whatever and it's negligible.
BernieD said:IIRC, he indicated that he got between 1-2 mile increase in fuel economy with the deflectors installed. I wouldn't call that negligible.
IIRC, he indicated that he got between 1-2 mile increase in fuel economy with the deflectors installed. I wouldn't call that negligible.
The deflectors smooth out the air and move it around the vacuum improving your aerodynamics.
Ned said:There are some photos of wind tunnel tests on the web site.