I'd be surprised if nobody else has had this idea, so I thought I'd throw it out there and find out of it's worth trying.
The idea is to take two standard HVAC elbows--short-radius by default--adjust them to 45 degrees each and put them together to make a longer-radius 90. Has anyone tried this? Did it work? Was the radius long enough to be comparable to "real" long-radius 90's?
While those expensive, smooth long-radius elbows are both lovely to look at and nicely efficient I like the idea of using adjustable elbows, if for no other reason than the reality that "perfectly square" and "perfectly straight" seldom share a sentence with "ductwork" or "Conduit." I like the adjustable LR elbows Oneida sells for around $15, but if I can do the same thing with a couple of $4 elbows back-to-back, I'd love the economy even more.
What say ye? Anybody tried this?
Thanks!
D.