I installed the first two electrical components recently. In this picture you can see a 20 way fuse block. This had to go in now since it was necessary to install the cowl cheek extension for painting. Power will come from inside the cowl cheek extension.If a fuse blows I will manage without whatever I loose. Playing with breakers and fuses in the air is pointless.
Under the left hand step, next to the area containing the stick I am installing some electrics. There are three relays and the speed control unit for the trim. I have mounted them on a removable panel so I could ease the task of wiring everything up.Two of the relays control the trim. Strictly speaking I could drive the trim from the stick switch, but I prefer it this way.
The other relay reads a signal from a micro switch on the flaps. When it senses the flaps are up it pushes the trim power through the speed control unit. Otherwise it bypasses it. I have no manual override, but this way I have one less switch to play with. More time for 'eyes out of the window'.
I really like push on terminals. This is a 12 way unit of pairs of tabs. It will be fully populated (24 connections) when all this comes together, and I am all for simplicity. They are made by Western Electric. I am always surprised they are not more popular.
You can just see the end of a bit of conduit poking through the fore and aft bulkhead. My intent is to use this to take a very few wires through the centre of the bulkhead where the control column passes as a way to get behind the spar.
The relays are Potter & Brumfield part # T9AP5D52. They are easy to buy from any of the big electronics suppliers. The terminal strip is here.
http://www.weco.ca/1_0/1_4/1_4_tech_photo_search.asp?level_id=6
Look at the second item down.
