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I have just joined ecomodder. I found the site while searching for details of vortex generators for cars etc. I am interested in making a set to fit to my caravan (RV) which has a upright rear end which creates heaps of drag. I have seen a few caravans here in Australia fitted with VG's. They might work but it will be fun trying anyway. I would like to find out the dimensions/angles etc required to make and fit VG's. I don't believe it is cost effective to buy a set not knowing if they are going to work. Thanks in advance. Frank
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