ron sterba
Well Known Member
Five hours on just finished RV9A. I have float senders in tanks. Right tank sends intermittent readings of fuel capacity. Figured I had a high resistance open on grounding between frame and fuel tank plate and wing frame. Every screw showed a good short between fuselage/wing ground and large plate ground. fuel float plate (center of plate has screw for sender lead wire) assembly bolts up to the larger plate on tank. This larger plate has good grounding but NOT THE SMALLER plate. I used pro seal on ALL screws on both plates but I figure after testing that smaller plate ,it has HIGH RESISTANCE OPEN TO GROUND. The screws on the small plate are pretty much covered with pro seal that trying to remove one might be impossible. Now my friend helped me come to this conclusion on the high resistant OPEN when he grounded a test lead to the aircraft frame and used the other probe wire pin to scratch a mark into the plating coat of that smaller plate. It was at this point the tank level reading started to read correctly on the Dynon Skyview display. ( same reading as dip stick in tank). Conclusion is I need a ground to the small plate of sending unit. I don't think I want to remove tank from wing. At this point I don't understand why a small angle plate wasn't spot welded to small plate when it was made. Now I grant you I know more about grounding than I did when I made this assembly several years back. So what are your thoughts on making a connection for a ground to this smaller plate????. I can remove the fuel from this tank. I thought of drilling but I would not be able to contain metal fragments in tank from hole drilled. Can a ring terminal be soldered to smaller plate???. Or maybe a spot weld of a angle piece???
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Thanks,Ron in Oregon RV9A
OPEN FOR YOUR THOUGHTS
![Winking face with tongue :stuck_out_tongue_winking_eye: 😜](https://cdn.jsdelivr.net/joypixels/assets/7.0/png/unicode/64/1f61c.png)
![Winking face with tongue :stuck_out_tongue_winking_eye: 😜](https://cdn.jsdelivr.net/joypixels/assets/7.0/png/unicode/64/1f61c.png)
![Winking face with tongue :stuck_out_tongue_winking_eye: 😜](https://cdn.jsdelivr.net/joypixels/assets/7.0/png/unicode/64/1f61c.png)
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Thanks,Ron in Oregon RV9A