Hi Hamish,
You look good for "aero-ness" with the way the TD will fit
in the cross-sectional area of the Kia that has already "punched
through the air", it shouldn't hurt your gas mileage very much.
There are some threads on the forum RE: aerodynamics, but the
one in the Foamies section is the one I can think of at the moment.
"Aero" affects all builds regardless of construction methods or
materials.
I think brakes are a good idea regardless. Does Australia Require
them ? - as I believe Europe does(?). Andrew/angib could probably steer
you to the source for the Australian trailer design rules. Also the
brake controller is located in the car as that is what allows you
to apply and control the electric brakes on the trailer. There are
some threads/posts in the Electrical section on here about that.
And Just For Fun:
Here is a link to the foremost Australian Vintage Caravans website.
It has interesting info on your caravan heritage and examples of
them by those restoring and using them. There are even a couple
vintage TDs covered - they called them "Caravanettes" back then.
This is the forum:
http://vintagecaravans.proboards.com/index.cgi?
This is the Home Page:
http://vintagecaravans.com/From their DHL - Down History Lane - section you can look up all
the multitude of brands/makes from the past. The first post in it
has an index to them. In that is the link to:
The Expandavan:
http://vintagecaravans.proboards.com/in ... 060&page=1This isn't as aero as your planned TD build, as it is a much taller vintage
Aussie TTT, but it is my favorite TTT design of all that I've seen from around
the world so far. For travel it's body is @ 5ft3in-6in wide by 10-11ft long
and 7ft9in - 8ft6in tall [from the ground]. They were built by three different
manufacturers over the time they were produced in the 1960s and early 1970s,
offered in bondwood [plywood], fiberglass and timber [wood] framed iterations.
[The one called "Fugly" is not an Expandavan brand but is one of @ five builds
by a master carpenter at a furniture company. Its body is about 6ftx8ftx8ft.]
Those expanding on three sides are my favorite version of them [both in the
Expandavan and in Fugly].
And here's another Australian Vintage C'van website:
http://www.ourtouringpast.com/Cheers,
Norm/mezmo
If you have a house - you have a hobby.