JC Glue strips of lumber around the edges of the your panel in the same manner as the sidewall of the fuselage boat. Backup the backside of the panel at each instrument with thin aluminum angle set vertically with the instrument bolts through the instrument, plywood and aluminum angle. Make the aluminum angle long enough to reach the upper and lower edge of the panel. Fasten the ends of the aluminum angles at the edge of the panel. You could get fancy and install nut plates in the aluminum angle to accept the instrument screws. Depending on how you stack them, you could put two or more instruments on the same pair of aluminum rails. When you are done, you would have a 3 mm plywood panel that's braced with aluminum angle and hard points at each instrument.
Sid Wood Tri-gear KR-2 N6242 Mechanicsville, MD, USA smw...@md.metrocast.net >I'm starting to build the instrument panel. I plan to build the panel from 3mm (might be 2.8, I'm not sure) plywood, and I need to know what thickness is required to ensure the panel will be stiff enough. I understand that it is firstly important to know WHAT will be installed. Well, I'm very much in the steam-age regarding my instruments, so they are heavier than the nice electronic gadgets one can buy. Should I stick 2 plies together, or will one be enough? Regards. JC JC Marais Centurion South Africa 082-401-5259