[seuadr]

Originally Posted by aerohead

this goes back a few generations, but illustrates some of the challenge to streamlining an ICE underbody, compared to a BEV underbody.

fortunately, for the travel trailer there is not really any driveline to work around as everything is mostly tucked up inside the frame rails already - but the material that they use is very flexible and it is meant to cover the bottom, not streamline - for instance:



it seems like there is an opportunity to round out those flats (this is very similar to my trailer)

Originally Posted by aerohead

the original box-cavity, by Continuum Dynamics, financed with a Defense Advanced Research Projects Agency (DARPA ) / Small Business Administration' ( SBA ) innovation and research grant.
You may notice how 'shallow' the vortices are, captured along the spans of the four longitudinal panels.

Am i understnading this correctly - instead of a boat tail i could look at a stepped box (like in the picture)
for similar results? that is attractive because it would keep storage open for me, as well as likely be something
i could fold down when not in use.

Originally Posted by aerohead

Introducing a more radical change in initial cross-section violates adverse pressure gradient boundary-layer rules

Mmmhhh Mhhh - I definitely recognize some of those words.

I have no idea what that sentence means, but it sounds important?

i'm looking in to an inflatable section between vehicle and trailer - that sound simple to test and probably rather inexpensive

while googling it, i found a patent for a "Boat trailer with inflatable bladder" and got excited, but
turns out it is for keeping it from sinking - Borrrrinnnnggg (not really, i thought it was pretty cool)



now, would i need to have something to keep it inflated like those flailing car lot guys, or, do you think it might be possible to rig up an intake so that my driving inflates it appropriately?

I also still have diffusers to look in to - i've run across the concept in regards to a vehicle solo - and, actually in the act of working on replacing an evap canister vac valve found that the bottom of the durango actually already has a lot of pan in place (presumably to protect components) so i'm not sure if a diffuser in addition would make sense? thoughts?

Would i also be putting a diffuser on the trailer in the front?

Thanks again for your time and effort!

Jared