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Date:  11-25-2016
Number of Hours:  5.50
Manual Reference:  23-02
Brief Description:  Fabrication of Longerons

After considerable delay and procrastination decided to fabricate the longerons. Read all of the materials on the VAF forum which was very helpful. Completed step 3 page 23-02 - Opened the angle of the longeron as shown in Figure 4 from the start of the longeron to the end of twist & open line as shown in Figure 1. Clamped the longeron in a padded vise at the end of twist & open line as shown in Figure 1. Used a crescent wrench as shown in Figure 3 to twist the longeron inboard as shown and per the dimensions in Figure 1. When finished the top faces of the longeron both fore and aft of the end of twist & open should lay flat against a table. See Figure 6. Completed step 4 - Clamped the F-1255-L Longeron in a padded vise with the Bueller dies at the start of curve line. Carefully moved the die in 1 inch increments to develop the curve checking with the F-1234-R canopy deck template. Repeated the process until the curve matches the Template (F-1234-R Canopy Deck) within a sixteenth of an inch per Figure 1. Checked that the mid fuse longeron did not bend out of plane vertically as it is being bent in the horizontal direction. Rotated the mid fuse longeron 90°, clamped it in a vise, and bend it back straight then rechecked the curve with the template. Clamped the longeron at the start of bend line at the aft portion of the longeron as shown in Figure 1. Bent a single bend in the longeron as shown in Figure 1 of 4 degrees. As before check that the angle has not bent out of plane and adjust as before. Step 5 had been competed previously. Completed step 6 - Using a scrap piece of .025 thick aluminum to simulate the F-1270 Fuselage Side Skin, positioned the F-1234-L Canopy Deck to the F-1255-L Longeron as shown in Figure 2 (the canopy deck will overhang the longeron by .025). Flushed the aft edge of the canopy deck with the aft end of the template mark, then clamped the parts together. Match-Drilled #30 the longeron using the canopy deck as a drill guide. Took care when drilling to ensure that the drill is pe
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