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Steves S-20 Build Site.
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Date: 4-5-2016
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Number of Hours: 2.00
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Manual Reference:
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Brief Description: Antenna Plate Spacer and Header Tank.
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In preparing to cover the fuselage I noticed that the com antenna plate was not going to contact the fabric. I drilled out the existing inside rivet and inserted a 1/4" spacer and a 1/32" washer, re-riveting with a long 1/8" rivet I had left over from a previous project.
I have a plan for a low fuel alarm based upon an optical liquid sensor installed in the tank line from one of the wing tanks. It will never be used if I pay attention to fuel usage and levels while flying, but if I should happen to get distracted one day I would strongly prefer a light come on rather than the engine stop. The theory is that the optical sensor will turn a light on when the wing tank(s) run dry, and I will have 15 to 20 minutes (at reduced power) to find an airport, or at least a clear road or field while burning the fuel in the header tank.
To make this a more effective plan, I designed and had an aluminum header tank fabricated that has a 1 gallon usable volume, (a little larger than the stock tank).
I will run the return line to the gascolator, which will allow the fuel flow meter to give accurate readings, and eliminates a fuel line in the cockpit, as well as one of the ports on the header tank.
To ensure the header tank is full, I put a port at the front of the top surface and installed a schrader valve intended for a fuel injection system. This will allow me to purge all the air from the tank instead of relying on the air making its way up the wing tank feed lines.
I had to remove the factory supplied header tank mount angles from the fuselage frame and then fabricate and mount some new angles that allow the custom header tank to be bolted in place.
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Antenna plate will not contact fabric.
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Spacer makes everything better.
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Custom header tank mounted in place.
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