anthonyxritchie
I love flying!
- Joined
- Jun 27, 2018
- Messages
- 8
I'm trying to put a gear up warning to let me know that my gear is still up when it ought to be down. I have a few questions.
1. I tried to wire the gear down sensor to one of the unused "contact" pins on the 37 pin EMS harness. I tried a couple different pins and got nothing. It seems completely unresponsive to any voltage I put on the pin. The EMS display shows "R5" (range 5) whether there's 24V 12V or 0V on the wire. Am I missing something with setting up the contact pin? Pin 9 (my Pitot heat status) in is working fine as a "contact" sensor but that was already set up when I bought the system. I can't tell what's different about that one. I went into sensor input assigned the pin as a "contact" with name "gear" and put the sensor on the EMS display. I even messed with the ranges to make sure there were different ranges assigned to different input voltage.
2. Assuming I can get 1 figured out, is there a way to make the EMS warning aware of my airspeed within the Dynon system. Otherwise I can always wire in a separate airspeed switch but since the SV system already knows the airspeed it seems silly to have to put another device in that knows the airspeed.
3. this is more off topic but I'm very curious, is there a good reason that there isn't a way to have a gear up warning driven by GPS altitude AGL? I know big fancy airplanes have radar altimeters that will sound a gear up warning at 500 AGL but doesn't your GPS have a pretty darn good idea of your altitude and the terrain altitude? It would obviously be less precise but I don't know why it wouldn't be pretty straight forward. (or maybe there is a way to do this and I've never come across it).
1. I tried to wire the gear down sensor to one of the unused "contact" pins on the 37 pin EMS harness. I tried a couple different pins and got nothing. It seems completely unresponsive to any voltage I put on the pin. The EMS display shows "R5" (range 5) whether there's 24V 12V or 0V on the wire. Am I missing something with setting up the contact pin? Pin 9 (my Pitot heat status) in is working fine as a "contact" sensor but that was already set up when I bought the system. I can't tell what's different about that one. I went into sensor input assigned the pin as a "contact" with name "gear" and put the sensor on the EMS display. I even messed with the ranges to make sure there were different ranges assigned to different input voltage.
2. Assuming I can get 1 figured out, is there a way to make the EMS warning aware of my airspeed within the Dynon system. Otherwise I can always wire in a separate airspeed switch but since the SV system already knows the airspeed it seems silly to have to put another device in that knows the airspeed.
3. this is more off topic but I'm very curious, is there a good reason that there isn't a way to have a gear up warning driven by GPS altitude AGL? I know big fancy airplanes have radar altimeters that will sound a gear up warning at 500 AGL but doesn't your GPS have a pretty darn good idea of your altitude and the terrain altitude? It would obviously be less precise but I don't know why it wouldn't be pretty straight forward. (or maybe there is a way to do this and I've never come across it).
The GPS could use something as simple as the elevation of your destination airport and go off when you are within 3 miles and 500ft of it (it wouldn't even need to know about the terrain). Obviously there's still plenty of scenarios that it wouldn't cover but I would still use that feature if it existed. At very least it would cover the scenarios above that the airspeed warning missed.