I needed to install a bunch of things on the firewall before hanging the engine. Since the engine mount hadn’t been torqued to the firewall yet, I pulled it with the gear still attached to give me better access.
I laid out the ANL current limiter and shunt and drilled mounting holes through the firewall.
Then I laid out for nutplates and some extra rivets to tie the doubler to the firewall. The nutplate on the right (at an angle) ties the shunt into the firewall reinforcement angle.
I also laid out for the fuel pass through and installed the throttle cable pass through. As with other firewall penetrations, this is all steel, It can also swivel up to 50º to accommodate cables that have to penetrate the firewall other than orthogonally.
I then drilled out for the fuel pass through and some rivets for the doubler.
I replaced the AN3C bolts holding the parking brake on with some flush head stainless steel screws. Where there is nothing attaching on the forward side of the firewall, I’m trying to keep everything flush so the firewall is easier to keep clean. I still need to install the rivets in the doubler, but it’s too late to make noise tonight. I also installed the pass-throughs for the mixture and prop cables.
Since the parking brake is in for good now, I installed and torqued rigid lines connecting the parking brake to the firewall pass-throughs. It looks like the line on the right is touching the right cable pass through, but there’s plenty of clearance.
