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  1. M

    Seattle Avionics vs Garmin GPS175 published appoaches

    Can't possibly answer this, and I'd expect your hypothesis to be at least the starting point for an answer. Since the SV isn't a certified navigator and knows NOTHING about approaches (it just follows the guidance output from the certified navigator), it has none of those capabilities. You're...
  2. M

    Seattle Avionics vs Garmin GPS175 published appoaches

    I have essentially exactly the same setup you do, Charlie. The HDX doesn't use approach plates to drive anything. If you're flying an approach loaded in the 175, then the Skyview A/P is being driven by the waypoints and altitudes in the 175, whether or not the approach itself is up to date. The...
  3. M

    Circuit breakers

    I have the same, but it stays in the "OFF" position for both takeoff and landing. The last thing one needs during either phase of flight close to the ground is a servo grabbing an axis and doing something unexpected, or just fighting the pilot. Unlikely? Sure - but what's the cost of doing so...
  4. M

    Circuit breakers

    Love the 15600 series fuse panels - that's all I've used for any of my electrical installs. Simple, easy to install, reliable. So the fuse has to be large enough so that it will allow for as much current as the device will ever pull, certainly, and having a 1.33 safety factor is fine. But you...
  5. M

    Circuit breakers

    You really need to read the philosophy of aircraft electrical system design in "The AeroElectric Connection". You design out the possibility of safety failures in the architecture of the system - you don't rely on the pilot to make up for design deficiencies. Pullable breakers are bandaids for...
  6. M

    Circuit breakers

    I think this is more complicated than just "how may CB's do I need for three or four items". You don't say whether this is a new build with a new electrical system design; whether it's a retrofit in an existing plane; or how much ELSE you're wiring/re-wiring at the same time. I strongly suggest...
  7. M

    Pneumatics parts supplier

    https://www.steinair.com/?s=tube&post_type=product&dgwt_wcas=1
  8. M

    Loss of GPS during flight

    So my GUESS is that altitude hold and heading hold would still work. You could test this by disconnecting the GPS antenna from the system, go up for a flight and see what works and what doesn't. Maybe Dynon will tell us, but it would be easy enough to test it on a nice day over the home airport...
  9. M

    ARCINC-429 with GP175 not use serial port?

    No. My 175 talks to the ARINC module with two Rx lines, two Tx lines and one serial OUT arinc line (the manual states that's for additional info that ARINC doesn't transmit). The 175 also talks to my G5 through one serial out line and to the transponder for ADS-B out through one serial out line...
  10. M

    Define Op Limit 1 Area

    I don't think (but I don't know for sure) that what you want is possible - maybe someone will explain how to do it. HOWEVER, here's a possible workaround. If you divide up that circle into say, 36 segments (a line from 0 to 10 degrees, 10 - 20 degrees, etc.) and make each of those 36 points a...
  11. M

    Dynon SV-trimamp in stock.. But no shipping?

    There are some. I've run into a number. Just be glad you're not using Garmin servos - they have a 1A limit, and if you even get close to 1A, you burn up the servo. Yeesh. For those installs, I use TCW's amplifier - can then use any motor up to 10A, IIRC. I verify the stall current of the trim...
  12. M

    Testing

    RTFM for both. I believe that it's the "Local Display Menu" where you can tell it that you don't have a backup battery. And many of the voice alerts are configurable, although not all. I believe in the "System Setup" "Audio Setup" menu. Again, in the installation manual.
  13. M

    16.4 Update Feedback

    THIS. I was very pleased to see that there's now a way to take the play in the system into account, although I don't know that the hysteresis is a function of my pitch control system (there's very little play) or a software issue. I've played with the VSI gain to no avail. It'll hold altitude...
  14. M

    Different Boot Screen?

    Hmmm. Could be. The interesting thing about that, though, is that the refurbished screen has a serial # LOWER than that of the original right hand HDX screen. So was probably MFG'd earlier. Which boot screen do the latest units that currently ship have? If it's in hardware, it would be...
  15. M

    Different Boot Screen?

    Maybe, but why would changing hardware cause a different boot screen to appear? Boot screens are a programming issue...
  16. M

    Different Boot Screen?

    So I recently has one of my two 10" HDX screens repaired. I had been running version 15.4.7, but after the repair the firmware was updated to 16.3.2. After installation, I updated my other HDX screen and all the components to 16.3.2 as well. The repaired HDX screen shows a colorful "FlyDynon"...
  17. M

    Magnetometer and AP servo

    The installation manual is very clear that the remote magnetometer should be mounted far away from magnetic material, high current wiring, and motors. Putting it on the avionics shelf near the stepper motor in the servo is probably about the worst place in the plane to mount it. As you surmise...
  18. M

    Autopilot Rolls Into Turns Like A Fighter Pilot

    Can you please explain what the problem was and what caused it? Thanks.
  19. M

    ADSB altitude read out on flight aware vs other planes in same area

    ADS-B is based on the transponder altitude, which is PA. Your altimeter setting is whatever the barometric pressure is. There will always be a difference unless the barometric setting is 29.92.
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