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Bob Leffler's RV-10
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Date: 4-30-2009
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Number of Hours: 1.50
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Manual Reference: 29-2
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Brief Description: Bending the fuselage longerons
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29-2, Steps 1, 2, 3, 4, 5, 6, & 7
Cut the F-1046-L and -R Middle Fuselage Longerons from AA6-125X3/4X3/4 per the dimensions. Mark the skin rivet line on both the F-1046-L and -R Middle Fuse Longerons.
The F-1046B Longeron Bending Template is used for both the F-1046 Middle Fuselage and F-1013 Forward Fuselage Longerons. Mark it as shown in Figure 2 to eliminate future confusion. The markings on the other side of the template are shown on Page 29-3, Figure 1. Place one of the ends of the F-1046-R Middle Fuselage Longeron in a padded vise and prelude the free end. Using a rubber mallet, firmly strike it adjacent to the vise to produce a bend. Repeat this process at one inch intervals to produce a curve that matches the F-1046B Longeron Bending Template within a sixteenth of an inch.
Check the curve often to prevent over bending. The mid fuse longeron can be placed in a six-inch vise without removing any of the bend, so it is easy to add more curve later. Remove curve by clamping the middle fuselage longeron at the required point and pulling back slightly. Check that the Middle fuse longeron does not bend out of plane vertically as it is being bent in the horizontal direction. If this occurs, rotate the middle fuse longeron 90", clamp it in a vise, bend it back straight with your hands, then recheck the curve with the template.
Repeat this step to curve the F-1046-L Middle Fuselage Longeron.
Debur the F-1 046-L and -R Middle Fuselage Longerons. Cut the F-1013-L and -R Forward Fuselage Longerons from AA6-125X3/4X3/4 per the overall length dimensions. Mark the F-1013-L and -R Forward Fuselage Longeron at the four locations shown. Mark the skin rivet line, on both Forward fuselage longerons.
29-2 Completed per plans
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Middle Fuselage Longerons
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Forward Fuselage Longerons
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