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  1. nickmatic

    Help troubleshooting autopilot pitch oscillation

    Troublesome problem here. I have a 1986 Mooney 252, equipped with a KFC 150 autopilot with KAS 297B altitude preselect. There's also a roll-steering adaptor but I don't have the model number handy. For about a year once in a while (approx. once per flight) I'd get an excessive pitch up during...
  2. nickmatic

    Does this dent in my wing need to be repaired?

    No idea. Currently between mechanics as I've just moved.
  3. nickmatic

    Does this dent in my wing need to be repaired?

    Mooney Encore, 1986.
  4. nickmatic

    Does this dent in my wing need to be repaired?

    I just noticed this small dent in my wing near the pitot tube. Would anyone consider this necessary to repair for safety or reasons other than cosmetic? It's about 2" long and doesn't pierce the skin. Mooney Encore, 1986. Image link
  5. nickmatic

    Mask with or without microphone?

    I've been using a cannula for years in my Mooney and each time I tell myself to look into getting a mask for the higher altitudes and O2 savings. So finally I'm looking at the Aerox 4110-712 Series. I assume for the one without a built-in mic you put your boom mic in front of the black circle...
  6. nickmatic

    How does the manifold pressure sensor work?

    Thanks, makes sense!
  7. nickmatic

    How does the manifold pressure sensor work?

    I think my guy can get it capped, but is there danger running the engine if he can't (uncapped)?
  8. nickmatic

    How does the manifold pressure sensor work?

    Wow, really? Anyone know where I can find a diagram of how this works? Where does the other end of the hose actually connect? Right to the intake manifold?
  9. nickmatic

    How does the manifold pressure sensor work?

    Makes sense. Would this prevent the engine from running or just make the built-in manifold pressure gauge not work properly?
  10. nickmatic

    How does the manifold pressure sensor work?

    I just removed an Insight G3 engine monitor to send back for repair. Aside from the wire harnesses, I disconnected the manifold pressure sensor tube. My mechanic will be back from vacay in a couple weeks to reinstall and certify everything, but in the meantime I'm wondering can I start the...
  11. nickmatic

    My air data computer is interfering with my transponder???

    Just showing --- (dashes) on the GPS display for any air related items. Indeed the static system is a likely source of the issue, as is the OAT probe (that's where Shadin initially suggested I look). But given the fact that the transponder altitude is affected (and corrects when the ADC is...
  12. nickmatic

    My air data computer is interfering with my transponder???

    Not sure if I explained it correctly above. The way the Shadin guy explained it I THINK is that the gray code from the altimeter and the RS-232 from the ADC both come into the GTX 33 (maybe through the GNS 480, not sure) and it can fall back to the gray code if it's not getting the RS-232 data...
  13. nickmatic

    My air data computer is interfering with my transponder???

    Ok, I spoke to Shadin to float the static heater idea by them. He said he'd never heard of that but suggested it's likely that both the ADC and the altimeter are wired to the transponder and that the transponder uses the altitude from the ADC unless it isn't receiving it and then uses the gray...
  14. nickmatic

    My air data computer is interfering with my transponder???

    Thanks for pointing that out
  15. nickmatic

    My air data computer is interfering with my transponder???

    Really interesting... I wonder if the temp control has broken and it's overheating, causing the static air to heat up as well. Seems possible. Disconnecting and capping the static line seems like the way to debug this. Only point against this is that the altitude problem seems to go away really...
  16. nickmatic

    My air data computer is interfering with my transponder???

    I've never heard of that! Well they're not physically close to each other, but if they use the same static line and it's heating the air in there then the altitude would show higher. Does the Shadin ADC 200 have a heated static sensor? Maybe it's malfunctioning and overheating...?
  17. nickmatic

    My air data computer is interfering with my transponder???

    Yeah hmm, they are both attached to the static system. Good point. I suppose I can try disconnecting the static line from the ADC and capping it... Is the ADC capable of dropping the pressure in the static line in a way that would disappear when it is powered down?
  18. nickmatic

    Help me find the right battery charger

    UPDATE 2: Installed the battery today and she started right up. Success.
  19. nickmatic

    My air data computer is interfering with my transponder???

    So this is an odd one. When flying now ATC is telling me my transponder is reporting an altitude about 2500 feet too high (and they haven't been too happy about it, either). I figured out, however, that if I pull the breaker on my Air Data Computer, the problem goes away... WTH?? These 2 things...
  20. nickmatic

    Help me find the right battery charger

    So I got the charger and everything this morning and have added the electrolyte and am charging the battery. Initial current was 10A, dropping to 5 within 15 minutes, and down to 1 in about an hour. Now at 3h 15m and voltage is 31.4V and falling slowly. Current holding at 1A. The manual says...
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