RE: Rail mounting a Ryobi?
YES IT WILL WORK I HAVE ONE MOUNTED ON A BIPLANE IT WORKS GREAT THE ONLY THING IS IT IS TOUGH TO GET THE THRUST LINE CENTERED USING THIS METHOD BECAUSE OF THE LOCATION OF THE SCREWS ALL I DID WAS:
TRIM THE BACKPLATE RIGHT DOWN TO THE SIZE OF THE CASE ( SO THE BRACKETS WOULD FIT FLUSH
NOTCH THE BRACKETS SO THEY WOULD SLIDE INTO THE MOTOR A LITTLE BIT THERE IS A LITTLE HUMP IN THE CASTING YOU NEED TO GET AROUND AND POPPED SOME 1/4 IN LONGER BOLTS IN IT BUT FOR ME IT WORKED OUT GREAT I HAVE RAN THE ENGINE A BUNCH BUT HAVE NOT GOT THE PLANE OFF THE GROUND YET I AM DEALING WITH SOME WEIGHT ISSUES I TRIED TO FLY WITH A 15\6 PROP SPINNING 5,600 RPM ON A 18 LB PLANE AND IT WOULD NOT LIFT IT SO I AM IN THE PROCESS OF MODIFYING THE EXHAUST TO TRY TO PULL SOME MORE RPM ALSO TRYING TO TRIM SOME WEIGHT GOOD LUCK !!!!