In my earlier posts, I mentioned that to manipulate the various levers which move the seats results in relatively large amount of stress being placed on the attachment points of the seat to the platform floor; there is reason Weber seats have 16 attachment points to the flightdeck floor.
To minimise the chance of the seat moving when adjusted, I fabricated a mount that sits beneath each seat. The mount, constructed from wood, is 16 mm in thickness and is bolted to the 16 mm thick platform floor (36 mm total thickness). Rather than use wood screws to attach the seats, I decided to use 55 mm length bolts with washers; my thinking is that the bolts will provide far stronger attachment points, when installed through the seat mounts and platform floor, than wood screws.
Attaching the Seats
The first task was to cut and paint the seat mounts which was straightforward. Each seat was then attached to its mounting base and then secured to the platform in the correct position with bolts. The biggest problem was actually lifting and moving each seat into position on the platform, each seat and segment of flooring weighs over 50 kg.
Correct Positioning
The correct positioning of the seat and seat mount is very important. Boeing specification states that the distance from the front of the seat to the MIP is 340 mm, however, this depends on where you are measuring to and what type of MIP you are using. The measurement if using a FDS MIP is from the front of the claw feet to the forward edge of the lower kickstand. This measurement is 440 cm.