I am in the process of making decisions about my panel (RV-8). I was planning a TT Gemini as a backup EFIS, but now getting swayed towards Dynon D1.
Here are the pros that I am thinking for Dynon D1
1) Bigger screen
2) Simpler to plumb: No static or pitot lines (since all my AHARS are at the back of the fuselage, a TT Gemini would require additional routing to the front).
3) Simple to wire. Only need to connect power (and maybe a GPS antenna).
4) Dynon Firmware update seems simpler that TT Gemini (For TT I might have to send the unit in for any kind of firmware upgrade).
5) If I put a pinch mount, I can occassionaly velcro it to the backseat as an EFIS for a passenger in the back.
6) Back-up battery already installed
Some cons for D1 that I could think of:
1) I only get Ground speed instead of true airspeed (No static or pitot data with Dynon D1).
2) Not sure how good the GPS reception is (especially without the antenna). Some concern about reliability, especially if I end up in IMC with electric failure.
3) My primary EFIS is going to be a skyview, so I am really putting most of my eggs in one basket.
4) Pinch-mounted intrument doesnt feel like a real-instrument. It might feel like an accessory (this is more psychological ...)
So what do you guys think? Are there things that I am totally wrong about? (Again, this for backup EFIS for an IFR panel).
Just to add the rest of the panel will have a skyview system and a Garmin 650.
Here are the pros that I am thinking for Dynon D1
1) Bigger screen
2) Simpler to plumb: No static or pitot lines (since all my AHARS are at the back of the fuselage, a TT Gemini would require additional routing to the front).
3) Simple to wire. Only need to connect power (and maybe a GPS antenna).
4) Dynon Firmware update seems simpler that TT Gemini (For TT I might have to send the unit in for any kind of firmware upgrade).
5) If I put a pinch mount, I can occassionaly velcro it to the backseat as an EFIS for a passenger in the back.
6) Back-up battery already installed
Some cons for D1 that I could think of:
1) I only get Ground speed instead of true airspeed (No static or pitot data with Dynon D1).
2) Not sure how good the GPS reception is (especially without the antenna). Some concern about reliability, especially if I end up in IMC with electric failure.
3) My primary EFIS is going to be a skyview, so I am really putting most of my eggs in one basket.
4) Pinch-mounted intrument doesnt feel like a real-instrument. It might feel like an accessory (this is more psychological ...)
So what do you guys think? Are there things that I am totally wrong about? (Again, this for backup EFIS for an IFR panel).
Just to add the rest of the panel will have a skyview system and a Garmin 650.