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NOTE: Each of the pictures on this page is a clickable thumbnail which will open up to a much larger image for detailed viewing. In some cases you will notice differences between the photos and your plans and parts. This is due to changes made during the building of the prototype. I've tried to make note of the changes but if I missed anything please assume that the plans are correct.

Vertical Fin & Rudder

Image 1

Image 1

1. Dry fit together the basic vertical fin assembly consisting of 1/8" balsa parts V1 through V7. Carefully square up the ribs with part V1 and glue the entire structure with thin CA. (Image 1)

2. Laminate the 1/8" balsa V9/V10 parts together that form the base of the vertical fin. See plan sheet 1 for an isometric drawing. DO NOT add the V11 pieces at this time.

Image 2

Image 2




3. Add the 1/8" balsa sub-leading edge V8 to the assembly and sand to match the taper of the airfoil. Next add the V9/V10 assembly created in step 2 to the base of the vertical fin. (Image 2)

4. Carefully block sand the entire structure in preparation for sheeting. Make up two 1/16" balsa skins for sheeting the fin. Please note that the sheeting stops at the bottom of rib V2 and part V1 is notched accordingly.



Image 3

Image 3




5. Sheet both sides of the vertical fin being careful not to warp the structure. (Image 3)



Image 4

Image 4



6. Add the 1/4" balsa leading and trailing edges and rough sand to shape. These are made from sheet stock and are not supplied in the kit. (Image 4)


Image 5

Image 5




7. Add the 1/4" balsa V11 parts to the fin base as well as the 1/2" balsa tip block V13. Rough sand the entire structure to its' approximate finished shape. (Image 5)

Image 6

Image 6

Image 7

Image 7




8. Lay the 1/64" plywood rudder core RC flat on the table and glue a 3/8" balsa R1 and a 1/4" balsa R2 to one side. You may want to put some wax paper under the assembly so as not to glue it to the table! It is highly recommended that you use a slow cure glue and weight the assembly while it dries to keep it as straight as possible. This will also give you time to line up the parts accurately. (Images 6 & 7)


Image 8

Image 8



9. Repeat step 8 for the other side of the rudder. (Image 8)


Image 9

Image 9






10. Cut the hinge slots in the vertical fin to match the pre-cut slots in the rudder. Temporarily install the hinges so that the fin and rudder can be put together. Mark the leading edge of the rudder to match the taper of the fin and then remove the rudder and carefully sand it to shape. Finish sand both the fin and rudder to final shape. Lastly, sand the bevel on the leading edge of the rudder to allow for control surface movement. The finished assembly can be seen in Image 9.




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