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Zenith CruZer & Sonex Logs
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Date: 6-16-2020
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Number of Hours: 3.20
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Manual Reference: n/a
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Brief Description: Brain work / redesign stick wiring
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About half of this recorded time was based on brainwork, talking to vendors, and redesigning my stick grip.
Was trying to determine where to run my ADSB antenna; Main issue was that I have some coax on the right side of the plane, and one really shouldn't have parallel runs of coax next to each other. If I mounted the ADSB antenna on the oeft side, in order to maintain spacing from the main xpndr antenna, a 1 meter distance is required. Which would put the ADSB right under "the boys." Even though it's only 18 watts of power, I'd want it somewhere else. I decided I can now run coax down the left side and most the antenna a bit further back in the fuselage.
Next up was the stick functions. My stick grip has 5 separate functions - one PTT and 4 of my choosing. Ray Allen Co gives two wiring diagrams, but they assume you will be controlling their servos from all 4 switches. Speiaking with the company a few weeks ago, I believed that I was to use one of their diagrams for what I want - two switches for trim, and two for comm functions. When I finished wiring the other day, it just bugged me. I thought "that can't work..", so I called them up today. The confirmed my beliefs and tried to tell me that I'd have to use a relay to control the servos. Well, the more I thought about the switch grip architecture, I was convinced I could do it without relays. The resulting design is in the figure below. It's been implmented and checked out with a power supply and multimeeter.
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