Evo Construction - Fin Mounting

Locating the fins

With a pen, lightly draw a line from the top of the silencer cutout along the flute toward the front of the Mugi aircraft. Repeat this for both left and right wings of your Evo. These will be the lines on which the fins will sit.

INSERT DOWEL INTO FIN

Mounting rods

Take a 2mm dowel or barbeque skewer and cut it to about 80mm length. Insert one end into a flute near the front of each of your two fins as shown above. These mounting rods will add a great deal of rigidity to the fins when they are mounted on the model and can also allow quick removal of the fins for transport or replacement.

PUSH DOWEL THROUGH WING

Attach the fin to the Evo wing

Mounting the fin onto the Evo wing is very simple. Mark the position on the fin location line where the dowel will need to go and then firmly push the dowel through the top surface of your wing. If your dowel is not sharpened then use a screwdrive to make the dowel holes.

The fin should be mounted at an angle of 30-45 degrees from the vertical to suit your tastes. The two fins should be angled away from each other. Angling them towards each other is found to impair the top speed of the Evo - perhaps due to turbulence in the line of the motor.

FRONT VIEW X-SECTION OF THE FIN MOUNT

Additional security

As shown in the diagram above, using 25mm wide self-adhesive tape, tape the bottom edge of the fins to the top surface of the wing. Without tape, at high speeds the fins have been known to depart and control is adversely affected.