Quote:
Originally Posted by skyking
Driving home from my friend's shop today, I was thinking about suspending a 5' boat tail off the back of my tuck, complete with tail lights and backup lights. Thanks for giving me a little hope for that idea.
A proper aeroshell will hit my tailgate at about 50" or so on template. Carry it out another 5' makes it tasty indeed. 5' of taper won't hurt things either.
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In the images posted earlier for the railroad boat-tailed tailcar,all the boat-tailing was done in plan-view.
The length of the tail is 1.74X the body width for the full stinger.It's within 2.5% of the template,so it's going to just slide in between Mair's 22-degree,and Emmelmann's 23-degree max slope angle protocol for attached flow.The base drag is completely eliminated.Which would be the lion's share of road load for a light truck on the highway.
The locomotives,self-powered railcars,and buses all show higher drag without the 'trailer.'
At 9" ground clearance,the ideal self-powered railcar comes in at Cd 0.08.NUNA territory.
We may not be able to go that low with ground clearance without active suspension,but nobody has said that we can't streamline the wheels.
The caveat is,that we can't have all the excressences like awnings and rooftop AC units,'n such scraping the sky as we go.These sorts of things must be better integrated into the body,as orbywan is doing on his rig.
