Whatever happened to flying triangular patterns?
Haha. You could still try it, I guess, but good luck. For me, this one only really made sense if I had a complete electrical failure (or something close) and was in or above IMC.
If it was just radio failure, then I always figured that I would rely on a combination of my NAVAIDS (still working) and my transponder to navigate and communicate my situation. Pretty much everyone (pilots and ATC, both) are at least relatively familiar with the broad brush-strokes of that situation.
If I still had working NAVAIDS but no radio and no transponder (through some strange, simultaneous dual EP perhaps), I could try flying triangles, I suppose, but I wouldn't know if ATC saw it, since they wouldn't be able to communicate w/me to let me know that they saw it. Eventually I'd just have to navigate myself to a landing off the remaining working Navaids. I would have no way of knowing whether I should continue with the triangles because no one has noticed yet, or if I should commence my navigation and approach.
About the only situation where it might make sense to fly the triangles would be over a layer of wx that I know continues for a large distance, when I've lost all radios and all navigation equipment. Total electrical out or electrical fire-type scenarios come to mind. In this case, the triangles are my only means to communicate, and I MUST communicate because I have no ability to fly any kind of an approach into the weather. My hope on the triangles is that they send up an airplane, and I can fly the approach on his wing. Formation through the weather is tricky at best, though, and formation on the wing of an unfamiliar airplane, flying unfamiliar speeds is a last ditch effort to avoid an ejection/bailout scenario (if so equiped) or a blind decent into unknown weather to see if I break out at the bottom before I hit the ground. Heck, I'm probably still better off just flying straight and hoping for an end to the clouds before running out of gas than the trying the triangle thing.