>> So the Double Rainbow weighs 37 oz. without stakes and the Lunar Duo weighs 41 oz. with stakes? That's a 4 oz. difference! Love the spin.<<
Sorry, no attempt to spin here! The discussion of weights is more of a general guide than an absolute. Final weight obviously depends upon a number of factors including the rest of the gear you carry, what stakes you carry, how you seam seal the tent, and any weight reductions modification you make to the tent.
Just taking seam sealing alone, you can vary final weight of the shelter by as much as an ounce or more depending upon what sealer you use and how it's applied.
In addition the absolute weight of the tents will vary slightly from production run to run depending upon fabric or component differences.
Bottom line is that either tent provides significantly more room for considerably less weight than most traditional tents.
>> Thanks to both David and Ron for all the info. Perhaps one or both of you (maybe Ron, since David only slept one night in it) could comment on the stability in strong winds (I was thinking the DR looks more streamlined but perhaps I'm somehow influenced by the pic of the LD with vestibule open, which of course looks a bit more "boxy" but probably has nothing to do with vestibule-down stability). <<
Instead of simply talking about stability, I’d like to turn it around and approach it from the failure point of view. What is important is important is what is the possible failure points and how catastrophic is the failure should it occur. There are three primary vectors of failure causing a tent to collapses (Fabric or Seams Ripping Out, Poles Breaking and Stakes Popping Out). While each of these failures results in a collapsed tent. The first two can life threatening if they occur at the wrong time.
That said it’s also important for the user to understand the limits of whatever shelter they chose. The more you know the better prepared you’ll be in using your gear comfortably and safely over a wider range of environments. Ultimately you have the final choice of where to setup your shelter so that it’ll provide you a safe and secure night’s sleep.
That said, while the Lunar Duo is designed to deflect the wind, it doesn’t so by incorporating a rigid frame. The only real tension is on the two vertical poles on either side of the tent. If one is using trekking poles, you’ve got a significantly greater amount of support than found in traditional tent poles. After all how long do you expect your tent pole would last if you had to substitute it for your trekking pole. The two small spreader poles at the ridgeline are not under pressure and simply pivot at the apex as pressure is applied.
The wide side panels of the Lunar Duo will collect a greater volume of wind than the more tapered Double Rainbow. However, there are 3 guy outs on each side that can be used to minimize deflection if needed. Even you don’t add the guy outs, there is such a large volume of space within the tent that you’ll have a lot of room in the tent even at maximum deflection.
The Lunar Duo is designed with no seams in the canopy over the sleeping area. So a ripped seam can be fairly easily repaired enough to get you back to civilization, with minimal affect on the main area of the tent. The Lunar Duo also has no poles that can be easily broken. Even if you manage to break a pole, with a little effort you can make a substitute that’ll get by.
Hopefully no spin just my perspective.