Brief Description: Fabrication of External Power Mount
When last I left this topic, Phil had machined a spare seat back brace to accept the back of a 3-prong power receptacle. I ordered some 1"x1" angle to complete the mount; it arrived, so I cut a section to match the length of the mount so far. I clamped the angle to the mount so there was about 1/2" extending from the side and marked the cutout in the mount. Using a grinder, I removed this material from the angle and then marked and drilled four holes for AD4 rivets to hold the angle to the mount. The two innermost rivets will be under the receptacle, so they were countersunk for flush rivets. Then I cut a 1.5" section of angle to tie the mount to the baggage bulkhead. This angle would be on an angle, so I clamped it to the builhead and placed the mount on it for drilling. Then I bent the angle open a bit so it matched the bulkhead while the mount was parallel to the floor. You can see in the third picture where I am holding the mount in place so that it will be slightly lower than flush to the baggage floor.It still needs to be drilled to the rib and bulkhead but first I must install a ground strap from the third post to the mount. However, the EAA monthly meeting started, so I will continue tomorrow.
You may wonder about the close proximity of the Oxygen fill but the receptacle is completely inert when not activated (the solenoid must be powered externally) and will be placarded to warn against filling the oxygen while the aircraft is on external power.