Q2 Plans Chapter 9 Page 9-05
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- Category: Q-2/Q-200 Plans
- Published: Monday, 22 May 2006 09:05
- Written by Quickie Aircraft Corporation
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GLASSING THE AILERON SLOT FOAM CORE SLOTS
.....The aileron slot foam core inside slots are glass ed with 2 BID at 45 degrees to the spanwise direction. (i.e. T.E.). Knife trim to the edge of the foam core, as shown on the sketch. SHOULDER HARNESS INSTALLATION
..... Remember those 20 BID plies that you laminated over the two SH1's when you performed the "BOTTOM" skin and spar cap lamination? Now is the time to drill and tap each SH1 with a i x 28 tap for a AN4 bolt later. The sketch shows the complete assembly. We don't recommend actually attaching the shoulder harnesses until after the main wing is mounted to the fuselage. Note that both shoulder harness straps of each shoulder harness assembly are attached to one bolt, in a Y fashion. Also, the 4130 Steel Bushing should be as short as possible, to reduce bending loads on the bolt. INSTALLING THE AILERON SLOT FOAM CORES
..... This step is critical to having a nice looking main wing and aileron union, so follow the directions carefully. .....To start out with, the aileron slot foam cores that you hot-wired way back when were purposely made longer than necessary. Your first task is to size them for the correct length. To do this, you must measure your fuselage width at the fuselage/aileron slot foam core junction. Take measurements of the main wing, skip ahead to the section on "Mounting The Main Wing To The Fuselage", and determine that dimension, on either side of BL00. Mark the proper points on the main wing. Wait to trim the inboard aileron slot foam cores until after they have been, installed on the main wing. .....Next, determine where to trim the outboard aileron slot foam cores. Since each elevator was made 48" long, measure 48" plus 1 inch (for aileron/ fuselage clearance) from your first mark outboard and place another mark. This is where the outboard ail eron slot foam core wi'" be trimmed, but, as before, wait until after installation to do it. .....Skip ahead to the CANARD chapter, "Installing The Elevator Slot Foam Cores" section for a sketch showing the geometry of the attachment. It is easier to check clearances top and bottom if the main wing is jigged vertically on the jig tible. This will also keep the joint from running. A few scrap pieces of lumber and bondo should be sufficient. .....The important point to remember is that at the shear web attach point along the span, the top and bottom of the aileron slot foam cores should flow smoothly into the top and bottom surfaces of the main wing. .....Once the attachment has cured, trim the aileron s'lot foam cores back to the "Eventual Trim Line". (See CANARD chapter, "Installing The Elevator Slot foam Cores" section for a sketch showing the detail). Next, sand down the "tails" so that you can achieve a minimum of 0.4" of glass-to-glass bond'with the inside slot lamination, while at the same time fairing everything nicely into the main wing contour forward of the shear web. At the glass-to-glass bond area, you must sand, away all micro and epoxy and get down to the glass. Spend some time looking at the surfaces getting the alignment the best that you can. When everything is ready, laminate 2 BID at 45 degrees to the main wing shear web on the aileron slot foam cores, top and bottom, being sure to achieve at least 0.4" of glass-to-glass bond, and lapping up onto the main wing at least I". Note that the sketch in the CANARD chapter calls out dry-micro fill if required at the top and bottom of the shear web joint. Trim the inboard and outboard aileron slot foam cores at the marks previously made on the,canard main wing, respectively. If the aileron slot foam cores want to stick up a little bit, this is OK since that can be sanded later. Any dip, however, will have to be filled with micro. This fit is important cosmetically, so take you time. .....The aileron slot foam cores are installed to the main wing shear web with micro-slurry on the foam cores and epoxy on the shear web (don't forget to remove the Peel Ply!), plus a few dabs of 5-MlN to keep the two attached during cure. |
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