Quote:
Originally Posted by Sven7
This is why we always recommend putting large radii on boat tails.
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I've done some research into hovercraft ducts where we go from round to square/rectangular in a convergent taper. Building a boattail would be similar in that we would be going from square to round with a convergent taper.
Other than a generalized arc from the template which must be twisted in 3D to even be considered relevant, I see no direct application of the template in long section if the cross section is a total bust.
This is a classic case of trying to fit a square peg into a round hole (
half round hole actually), maybe there should be vetting process to avoid such situations in the future.
Quote:
Originally Posted by freebeard
I've taken the same journey as you—that's what prompted the 'Does it have to be a half-body...' thread. I was asking how much violence you can do to the template and still have it respect you. Nobody addressed it as I had hoped.
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Sorry, I have failed you (and myself), other forums dedicated to aerodynamics must be reading this and having a good laugh on us all. Like I said I feel embarrassed, and now embarrassed for anyone suckered into this great folly.
I like the aero-template as a concept which I can keep in the back of my mind, but as the tool it was intended to be, it's fallen short, way short in my opinion.
Perhaps a better tool would be a box in section proportioned to a typical road car's length and a typical windshield, then given a "known to work" boattail.
Such a template would be applicable to retrofitting existing cars/trucks, but the gold standard Part-C template could be reserved for scratch built projects with a hemispherical cross section.
Just my thoughts.