A flying wing sans vertical surfaces uses "spoilerons" for yaw control, but needs artificial (closed-loop) stability augmentation. It has no natural yaw stability.
Note: the
Northrop B-35 (prop powered) had enough lateral area in its pusher props to provide yaw stability. When the props were replaced w/ jets on the XB-49, it was necessary to add small vertical fins.
The air Transat hyperlink should I think be this one Air Transat Flight 961 - Wikipedia, the free encyclopedia as the one previously quoted leads to the same airline's fuel starvation incident.
Roger that. I copied the link before checking.
