Seat Belts - Part 3

This blogs cover the installation of the seat belt and attachments.

Overview
Covering the ongoing work to install the seat belts.

Installation
Attachment's for the pilot's shoulder harness were fabricated from two [2] pieces of 0.040'' 2024-T3 secured buy reusing existing 4 mm pop rivets located in the main spar. Both plates were fixed into a single assembly using five [5] 3 mm pop rivets.

Pilots shoulder harness attachment
Note: slotted attachments

The pilot's shoulder harness will be installed as two separate runs to prevent the belts being trapped by the gas strut with quick release attachments allow seat removal. 

To ensure that the belt attachments are located about the shaft center, a spacer was machined from 2024-T3 aluminium bar and alodined. 

Co-Pilot shoulder attachment
Doubler not installed as this was when that error was noted

The rear seat shoulder harness attachment had its doubler fitted at the attachment point using five [5] primed S/S pop rivets for this attachment as it's the most loaded single attachment point with a 600 kg design load.


Note: Breaking load for a forged 6 mm shackle is 2000 lbs [900 kg]

Co-Pilot lap attachment
spacers are typical for all standard triangular attachments

As noted previously Bow Shackles prevent unwanted alignment issues and ensures the belts are tight as practical in an accident.

Co-pilots area showing belts, hydraulic runs to pump which is now located in baggage compartment.  The flap controller was relocated forward one station to provide better access at commissioning while allowing the seat belts to be installed

Comments
Doing it again slots would be used at the attachments points but in the end the biggest task was just to design a suitable method for the attachment for the shoulder harnesses and in the end, it's a happy builder.

Next task is to terminate the flap controller, finish cable supports and install flap controller and once done that is the rear compartment at the famous 80/20 point.

At least the co-pilots happy