- All tents have to either absorb wind energy briefly (backpacking/alpine tents deflect significantly under heavy gusts, then spring back) or they have to avoid it through aerodynamics (ie, no flaps, rounded shape, low to the ground etc.) The challenge with all roof top tents is they have vertical walls to maximize the space, are located well off the ground above the vehicle and usually require pretty stout poles/canvas due to the folding mechanism.
- It's always better to put the small side of a RTT into the prevailing wind if you can to reduce the surface area exposed, or if possible locate your camp in the lee of some larger object be it a rock or a grove of trees/brush. There's no magic that will make this tent do something other RTT designs can't. Anything flapping loose in 35 knots of wind is bound to wear prematurely, whether a tent or a main sail.
Even so, our goal is to make a durable weather proof shelter for extended use. The first UMV tent was pretty simple, so there is not a lot to catch the wind. The other subtle thing is it's 12” shorter in the front than the 2nd UMV tent or the Nemo design, both of which were even in height front/back, which gives more room inside but increases the surface area on the front panel. The walls on all the designs are slightly tapered in, to help shift wind over the sides and stiffen the poles, and the single-wall design so that should help the flapping. The eaves/awnings on the UMV & NEMO designs will definitely change in the next revision(s) to improve set up and weather proofing.
The tent on the NEMO looks to be the original revision to my eye, though the new tent was due any time, but maybe not “in time” as AT had other projects they were working on for SEMA. We did a batch of upgrades on the shell/cap/hinges and the tent poles over the summer so everything is fitting better on that prototype even with the same tent.
- The NEMO is the only unit on display at SEMA – the other prototype is back at UMV with the new tent in progress on it. We're building the first production composite parts right now, so I need the tent dialed in now so we can ship the first couple. (If I was authoring a novel they'd call it writer's block, not sure what they call it in sewing work) I have a lot of ideas that I am exploring with suppliers and more experienced tent guys about technical aspects of the design and sewing - single wall tents are more challenging that our pop up tents. Instead of prototyping a whole tent which would be cool to post photos of, I am doing concepts in CAD then sewing a feature at 1/3 scale to see how it looks/works.
- off to SEMA myself, the AT guys are already there - so we might not reply as quickly this week!
cheers, John