In January, 2002, the 48" Bluto was born. It had a slightly different aspect ratio, and a single, rotating, split-fin. Many of the B-48 DS videos on this site show it in action. In May, 2002, the 56" Bluto was the next step. In general, the testing of this new "Delta-Nose" design was proving to be an amazingly high speed, low drag flying wing, with phenomenal energy retention!
Unbelievable energy retention and it simply doesn't fly slow. The longer you fly the faster it gets. This is liable to replace the JW as my primary high speed, higher wind, dynamic soaring glider. It's got about 3 times the roll rate of the JW or Nemesis too. It's very very fast out of the box!