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There are examples throughout the paper where many of the rules of thumb so often used here are shown to have quite doubtful validity.
That won't surprise anyone who has done their own research - either through reading or testing.
Just a few examples
1. I've never understood the fascination here for Kamm tails - I could never see a mechanism by which they were supposed to give the results often attributed to them. And it turns out those results are a fallacy.
2. The oft repeated statement made here that we're interested only in what is happening at the back of the car isn't supported by the paper - and furthermore, what works best at the back of the car is heavily dependent on what is happening further forwards. So applying a template shape to just the back of the car - done here dozens of times - is misleading.
On the other hand, the paper does support some things that have been done here - notably the use of added long, tapering tails to a small base area.
It's a very significant paper for this group, and the advice that's often given in it.
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