What do you mean by "cut 2 side-by-side strips from one end of the balsa control surface stock?".

Which piece is this "balsa control surface stock?"

From : Don Stackhouse

Jose,

On the parts list (the last page), look about 1/3 of the way up from the bottom of the list. The control surface stock is a piece of 3/32 inch x 2 inch x 26 inch balsa sheet, used for making the control surfaces (rudder and elevator, or ruddervators, depending on which type of tail you're building). After you make your control surfaces, there will be a piece left over. The filler pieces are cut from this leftover piece.

If I understand well, I have to glue them on top of the longerons, Do I glue BOTH?, meaning as the top of the glider's nose?. Even if it is like this, F2 sits higher than the sides of the ship, therefore this top simply does not fit, even worst, the picture shows the strips being glued ON THE SIDE, Is it then like a triple layer of wood to the sides?.

Then it says "between each fuselage side" so I come back to the feeling that it is the top of the nose, am I right?.

The spruce upper longerons run along the top edge of the fuselage sides in the tailboom and most of the wing saddle area. At the leading edge of the wing saddle and along the nose we ran into a problem. We wanted to keep the longerons in one piece and fairly straight for strength, but the shape of the top edge of the fuselage sides in that area would have required a break in the longerons at the leading edge of the wing. It would have caused a very bad weak spot. Instead, we ran the longerons in a smooth curve a little below the top edge of the fuselage sides, with the position of the longerons controlled by the top edge of the doublers (step 4) on either side of the fuselage. The problem is that there would now be a section of the fuselage side walls above the longerons in the nose and the front portion of the wing saddle that would only be 1/16 inch thick balsa. By the time you finished sanding the corners of the nose area round, there would be almost nothing left of the fuselage side walls in that area for the side edges of the hatch and battery cover to sit on. The filler pieces fill in this area between the top of the longerons and the top edge of each fuselage side. If you look on the plans sheet at the drawing of the fuselage cross section at F2 you can see them. They are also visible on the fuselage cross section at the front end of the radio compartment hatch, between F1 and F2. Find the 3/32 inch square spruce upper longerons on either side of F2. Notice that they are a little below the top edges of the 1/16 inch balsa fuselage sides. There is a space between the top of each longeron and the top edge of the fuselage side. The filler strips fill those spaces. You cut them a little too wide so that they stick up above the top edge of the fuselage sides when you glue them in, then you trim their top edges flush with the top edge of the fuselage sides.

Look at the photo for step 7, at the top of page 6 of the instructions. The fuselage is lying sideways, with the left side up and the nose at the right side of the photo. The left filler strip has been installed and Joe Hahn's hand is trimming it flush with the edge of the fuselage side with a no. 11 X-acto knife. The right filler strip has not been installed yet, and you can see the top of the right upper longeron and the inner face of the right side of the fuselage where the filler strip will sit. After trimming, the forward end of each filler strip will taper to a point at the front end where it meets F1, and also to a point at its aft end where it blends into the top of the upper longeron about 1 inch behind the leading edge of the wing.

Hopefully I've cleared this up for you, if not, please e-mail me and I can try again. Good luck with your Chrysalis, and please keep in touch, especially if you have any more questions.

Don Stackhouse @ DJ Aerotech djarotec@bright.net