There is a fine line there. The B&R rigs were first used, as I recall
, in the early '70's. Over time we have gone to almost all frac rigs with our new boats with spreaders swept as much as 30 degrees. This allows the designer
to eliminate the standing backstay and open up area for a square head
main or lots of roach. It also allowws builders to get away with having one chainplate on each side instead of two or three and if you eliminate the backstay chainplate you have saved even more money
. The swept spreader rig has less wire and fewer chainplates.
I would think that a royalty has to be paid to call a rig a B&R rig and I suspect your boat is not a licensed B&R rig. But you could say it was "inspired" by the B&R rigs.