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BRS Installation Hints: Difference between revisions
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* The manual says to avoid interference with the longitudinal stringers however, the brackets don't fit between them. The photos also show overlap. One needs to grind away a bit to allow space for the stringer. | * The manual says to avoid interference with the longitudinal stringers however, the brackets don't fit between them. The photos also show overlap. One needs to grind away a bit to allow space for the stringer. | ||
* The distance of the centers of the brackets should be 15 inches. However that is not achievable. The center tunnel is 2.4 inches outside to outside wall. The bracket is 4.8 inches wide, so the gap between bracket and center tunnel should be 3.9 inches to give you 15 inches center to center (2.4 + 3.9 + 2.4 + 3.9 + 2.4). If you do that you are crossing the stiffener in the middle of the bracket. Doable is 0.5 inch which gives you 8.2 inches center distance (2.4 + 0.5 + 2.4 + 0.5 + 2.4). This is also what the photo shows in violation with the instructions. Best is to align the innermost hole with the rivet line that connects the F-1019-L inboard baggage rib with the F-1006B Bulkhead. | * The distance of the centers of the brackets should be 15 inches. However that is not achievable. The center tunnel is 2.4 inches outside to outside wall. The bracket is 4.8 inches wide, so the gap between bracket and center tunnel should be 3.9 inches to give you 15 inches center to center (2.4 + 3.9 + 2.4 + 3.9 + 2.4). If you do that you are crossing the stiffener in the middle of the bracket. Doable is 0.5 inch which gives you 8.2 inches center distance (2.4 + 0.5 + 2.4 + 0.5 + 2.4). This is also what the photo shows in violation with the instructions. Best is to align the innermost hole with the rivet line that connects the F-1019-L inboard baggage rib with the F-1006B Bulkhead. | ||
*The edge distance for the holes in the area of the lighting hole of the bulkhead is violated if used as shipped in the kit. One needs to move the outer bolt lower (a tiny bit into the bend; the bend needs to be ground flat for the screw head) and the 2nd outermost hole towards the center.<br>[[File:2023-05-06 13-43-12.jpg|400x400px]]<br>The lines represent the lighting hole inside diameter, the lighting hole diameter where it starts being flat and then 2xD edge distance to all edges.<br>[[File:2023-05-06 15-22-37.jpg|400x400px]]<br>Note:Fasteners shown are temporary.<br>[[File:2023-05-06 16-12-03.jpg|400x400px]] | *The edge distance for the holes in the area of the lighting hole of the bulkhead is violated if used as shipped in the kit. One needs to move the outer bolt lower (a tiny bit into the bend; the bend needs to be ground flat for the screw head) and the 2nd outermost hole towards the center.<br>[[File:2023-05-06 13-43-12.jpg|400x400px]]<br>The lines represent the lighting hole inside diameter, the lighting hole diameter where it starts being flat and then 2xD edge distance to all edges.<br>[[File:2023-05-06 15-22-37.jpg|400x400px]]<br>Note:Fasteners shown are temporary in all images.<br>[[File:2023-05-06 16-12-03.jpg|400x400px]]<br>[[File:2023-05-06 14-12-24.jpg|400x400px]] | ||
*On the inside top corner, the bracket interferes with a rivet in the bulkhead, one needs to make an indent. | *On the inside top corner, the bracket interferes with a rivet in the bulkhead, one needs to make an indent. | ||
*The 5/16 hole match drilling can be done using a 5/16 to 1/4 inch drill bushing or a short piece of aluminum tube with 5/16 OD and 1/4 ID. With it, drill a 1/4 inch hole from the inside to the outside using an angle drill attachment. Then use a unibit step drill and widen the hole from the underside of the fuselage from 1/4 to 5/16. Finally file a bit from the inside to ensure the hole matches all the way around the circumference. | *The 5/16 hole match drilling can be done using a 5/16 to 1/4 inch drill bushing or a short piece of aluminum tube with 5/16 OD and 1/4 ID. With it, drill a 1/4 inch hole from the inside to the outside using an angle drill attachment. Then use a unibit step drill and widen the hole from the underside of the fuselage from 1/4 to 5/16. Finally file a bit from the inside to ensure the hole matches all the way around the circumference. | ||