Four angle brackets for the safety harness anchor points were fabricated from 1/8″ x 1″ x 1″ 2024T3 extruded aluminum angle. The brackets were cut out with a hack saw and then rounded with a bench grinder and any sharp edges filed away. Three 1/4″ holes were drilled in each of the four brackets. The …
Using a hack saw and file, the excess material from the four shoulder harness support tabs were removed and made flush with the front seat. A small and thick batch of flox was mixed and applied over the slot area to fill in any cavities and smooth out the surface. Four 1/4″ thick birch plywood …
Workshop temperature was21 deg C and 46% humidity. A small batch of flox was mixed using 16g resin and 6g hardner along with some flox. The four aluminum tabs were flox’d in place. Four 1/4″ holes were drilled (and countersink) into the aircraft step.
A line was marked on the forward face of the front seatback where each of the four shoulder harness supports are located such that the aluminum insert tabs would be centred with respect to the bolt hole and just below the layers of fiberglass reinforcement. Note: I measured the depth of the fiberglass reinforcement through …
Using a 1/16″ thick aluminum plate, four shoulder harness bolt attachment plates (3/4″ width) were cut out after drilling the holes for the shoulder harness support bolts and the nutplates. The alumium pieces were cleaned with Alumiprep. Four used shoulder harness attachments were obtained from the Beyond Blue Shop and also cleaned. The shoulder harness …
