Originally Posted by 
Chops
				 
			Just a quick question on all of these tents. Regardless of which brand you choose, how do you guys decide which way to sit it on your roof?
When I had mine, it went on both the D2 and the Defender, and both times I had it so it hung out the rear. I did this for two reasons, a) to help cover the rear of the car so in inclement weather you wouldn't get wet if you were cooking or something, just gave a bit more usable space (I thought) when it was wet. b)to "try" and help with wind resistance,,, yea yea, I know, pretty futile [bighmmm], but it was worth the try [bigwhistle][thumbsupbig][biggrin]
So, in regards to fuel consumption, many miles of keeping tabs on how we went, it did make a difference, and yes, especially if you went over the speed limit (being 100k), so on a freeway, shot to hell. Having said that, it didn't then seem to matter then what you loaded the car up with, it didn't get worse. So speed, with the tent on, and a trailer, and fully loaded in the back (Dual cab ute), it didn't use more juice than if it just had the RTT on.
So, why do you put them on sideways, or length-ways?