I understand binary,it's two canary's flying in formation-right?[sm=lol.gif]As far as T/W is concerned,all you need is about .2! What you need is LAUNCH SPEED with a pusher! Remember,a piper cub with a 65hp. engine takes-off and flies just fine on a power to wt. ratio of just 1:10 or so.The F-18 needs about 20+ mph for launch in order for the control surfaces to BITE the air.Would "trinary" mean-3 canary's flying in formation?[sm=bananahead.gif]