[skyking]

Originally Posted by aerohead

if the 'rear' of the tow vehicle and 'front' of trailer are 'matched'( however you can do that ),and if the gap were sealed,as in the graphic,there would be no pressure on the front of the trailer.It would be in a full draft.
That would be getting off to a really good start.

It will be in line with no more than a 2" gap between. The bed of the truck will be ~4" below the projecting part of the trailer. That will be the biggest gap.

What do you think of the rear profile as I have it?
The initial 9 degree slope fits the requirements of the floor plan. The 2nd, 12 degree increase to 21 degrees is totally arbitrary. I can steepen or shallow that one up, it is over mechanicals and storage. Everything aft of that vertical line, the side taper and roof taper can be changed.
I can construct those 75" transition radii from 0 to 9 and 9 to 21 degrees without too much difficulty. I hope that will keep things better attached than a hard angle.

Slowmover, the truck is getting 22 now, and 13 with the current 5th wheel. That's about a 41% drop.
There are several economy mods underway, but no time to either finish them or test them for a few months. Mostly it sits while I work 6 tens.
I have an active grille control in the works, electric cooling fans, rear wheel fairing, 75% belly pan, new bumper and front spoiler all planned.