Quickie Plans

Q1 Plans Chapter 9 Page 9-8

Details: Category: Quickie Plans; Published: Wednesday, 24 September 2008 01:00; Written by Dan Yager; Hits: 2525

account for the buildup of glass later on, move the line aft 0.1” . That is the cut line; it should intersect the leading edge of the wing at, or inside of, the fuselage sides. Check this to be sure. If it intersects the leading edge outside the fuselage, you will have to taper and rcnd -he core area outside the fuselage to avoid a flat spot. Cut off the foatri core along the cut line and round the corners slightly so that the glass will lay down properly.

Sand off the “tails” at the aileron slots and smoothly contour the airfoil back to the aileron slot. Put a micro corner in as shown.

LAYING UP THE BOTTOM SKIN AND SPAR CAPS

You are now ready to lay up the bottom skin and spar caps. This layup will require about 2.5 hours and take at least 2 individuals, and preferably 3.

Begin by cutting UNI glass cloth for the skin. Roll the cloth along the cut direction and mark it with the width. The wide pieces(22”) go outboard whi the narrower pieces(17”) go inboard.

Next, reread the aileron construction section and peel piy the trailing edge of the wing outboard of BL52 the same way.

The UNI layup is crossed at 45 deg. to the trailing edge of the wing to provide torsional stiffness. The fibers must be straight, so take your time getting the wrinkles and kinks out. Unrolling the cloth as you need it is advised also to reduce the awkwardness. Use scrap UNI oriented in the same directions to fill any spots not covered by the main skins.

At the leading edge, let the cloth hang down vertically. Trim to within 1” of the tangent pt. Trim the rest of the edges to within 1” also. At the inboard portion where you cut the core for the seatback bulkhead fitting, permit the UNI to wraparound to the bottom of the face.

No overlap is required; just butt fit the skins together. Squeege the cloth well to avoid building up excess resin.

Find the main wing spar caps FG, and H. These will be put on in that order. The easiest way to accomplish this is with three people: two hold the ends of the unrolled cloth while the third removes the frazzles; then the third man stands at BLOO and positions the cap in the proper location (centerline on BLOO and proper distance from leading edge) while the other two individuals keep the cloth off the foam. When the center man is ready, one of the people holding the ends lays down his end of the cloth spanwise and helps remove the wrinkles and kinks. Then, the other individual on the other end does the same thing. Squeege the spar cap well before repeating the process with the next one. Always squeege from BLOO outboard to keep the UNI fibers straight.

Peel ply all of the joints. Peel ply the first two inches of the leading edge.

Knife trim the leading edge at the tangent point before quitting.

Q1 Plans Chapter 9 Page 9-9

Details: Category: Quickie Plans; Published: Tuesday, 23 September 2008 01:00; Written by Dan Yager; Hits: 2551

LAYING UP THE TOP SKIN & SPAR CAPS

Let the bottom skin cure for at least one day.

Build a framework out of lumber and Bondo, as shown, to hold the wing jigged in place while you turn it over.

After the wing has been turned over, leave the lumber on and check the level lines on each tip. Shim as necessary to get the tip level lines absolutely level; then Bondo the jigging to the table in preparation for glassing the top skin.

At the leading edge, feather the bottom skin to a feather edge at the tangent point just like you did with the ailerons.

Glassing the top skin and spar caps is just like what you accomplished on the bottom skin with these changes:

The top of the wing has more spar caps.
At the leading edge, the top skin must wrap around the leading edge and overlap the bottom skin by about l

Although this layup involves more cloth, you should still be able to finish it in about 2.5 hours with two or three people.

Permit the wing to set for two days before breaking loose the lumber. Before moving the wing, Bondo a board onto the wing surface in the level position (i.e. so that a level set on top of the board will be level with the tip level lines). This will allow you to easily tell when the wing is level as you mount the wing to the fuselage later.

By the way, to avoid letters and phone calls to us, it should be noted that the photos accompanying these words show the level board and lumber framework on the canard. The principle is identical, however.

After the level board has been bonded to the canard, you may carve the wing tip to a pleasing shape and glass over it with one BID, overlap ping onto the wing skin at least l!

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Q1 Plans Chapter 9 Page 9-8

Q1 Plans Chapter 9 Page 9-9

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