The main modifications are tricycle gear, and a larger 160.5 sq ft wing area. 1/4th scale model airplane plans will be used to get the shape of the S9.
I will use the Poorboy building techniques of aluminum tubes, bolts, and riveted gussets.
The wing will be built with a main spar, and braced ribs. It will be in three sections. The center section will be bolted to the fuselage. It will have an 8' leading and trailing edge with a 6' width. The airfoil will match the plans scaled by 4. The outer wing sections will be removable, 12' long with a 4' width at the tip. The fuselage will be 3' wide leaving 5' of wing length for the center section. The center section will have 30 sq ft, 5' x 6'. The outer wing sections will be 12' long, and go from 6' to 4' width at the tip. The outer wing sections are 60 sq ft each, 5' average width x 12'. Total wing area will be 150sq ft, 30 sq ft + 60 sq ft + 60 sq ft. Also the area of the ailerons has to be added to the 150 sq ft. They at .5' x 8', 4 sq ft each. Also the center section has .5' x 5' of aileron area, Bringing the total wing area to 160.5 sq ft.
The fuselage will be built from 1/8th inch thick 1" T6 tubes with gussets, bolts and rivets. The outer wing sections will be removable for storage.
The landing gear will be changed to tricycle for ease of turn around on my 50' wide grass runway.
The motor to be used is a Rotax 583 Rave with 85 horsepower. The carburator will be a pumper carb from a SeaDoo 587 for acrobatics.
