So what's the deal with Burt Rutan's Boomerang anyway? Why is it so "lopsided"? As Burt put it, "The engine-out safety of most twins is so bad that even though they provide engine-failure redundancy, they kill more people per mile than singles". The Boomerang is his answer. The arrow in the picture points to the Boomerang's center of gravity (CG). The next two pages explain why the Boomerang is more stable than conventional twins, especially for single engine operation.