Almost every aircraft Burt Rutan has built is a breakthrough. Mostly asking questions that other designers weren't, like does a twin need to be symmetric. twin

Almost every aircraft Burt Rutan has built is a breakthrough. Mostly asking questions that other designers weren't, like does a twin need to be symmetric. twin tail booms have a long history. e.g p38 with twin engines. Burt Rutan's key realization was that the connected skinny horizontal tail doesn't really add much torsional stiffness and it's easy to obtain the required stiffness with the wing center box.