D-100 and D-180

[flickroll]

I currently have a EFIS D-100,  EMS D-120, AP74, HS34, and 2 servos,  all of which which work great.  However I have no Attitude redundancy in the aircraft, so if I'm IMC and the EFIS D-100 fails I would be in pretty deep  

One option to upgrade my panel would be to replace the D-120 with a D-180, and use that box for the engine monitor, and revert to it for the EFIS in the event the D-100 failed.  A couple of questions:

Would I need another remote compass and OAT probe?  I think the answer to both questions is yes, however the OAT is only required for TAS and related functions, and is not an absolute requirement for this installation.  Can the OAT signal be 'split' and fed to two remote compasses?  Can I simply stack one remote compass on top of the other, or is this a no-no?

Will the HS34 work with both boxes?  I THINK the answer is the HS34 would display identical information on both screens, correct?  If one screen failed, the HS34 would continue to work using the other EFIS box.  Same for the AP74, right?

Is there anything else I would need to make this dual setup totally independent of each other?

Is there a backup battery option for the D-180, and will it also power the EMS? Or just the EFIS?

Thanks

 

[PhantomPholly]

You should definitely have backup attitude to fly IMC.  If you removed all of your steam gages, a second EFIS is a good way to go - and you may be able to get a good deal on a used D-180 from someone upgrading to Skyview if you don't choose SkyView yourself.

You can use the second EFIS without a second remote compass, but if the first EFIS or DSAB fails you will be without  your compass. OAT is not critical to safety of flight, so I would not bother with a second and would rely upon DSAB to provide that info to both units.  You can stack the remote compasses just fine - they do not EMIT so should give you no problem, and others report them working fine that way.  The HS34 works with both boxes, but one will be "Primary" and will be the only one that can drive the AP.  Same for the AP74 - both of those units require a "Master" configured and working on DSAB to function correctly.  It MIGHT be possible to re-configure DSAB in flight to make the other box "Master" in the event of failure, but I don't think that would give you back your AP.

Brantel has a setup closer to yours, so stand by for him to correct any of my errors - but this should be close enough to get you started..

 

[flickroll]

Would do dual 7"  Skyview in a heartbeat but many basic features, such as nav display and AP control aren't available yet.  Looks like it may be some time too....

 

[PhantomPholly]

I wouldn't expect AP and HSI to be long coming, since much of the code base is being used from the existing units.

Moving map is another thing, as is the ability to program your route of flight into the EFIS rather than having it provided by your primary nav gps.  However, if you have a 430 or some such installed you can put your flight plan in that and, once the AP/HSI software is rolled out you should be good to go for on-course navigation.  Precision approach info will have to wait for the ARINC module.

But I'm not Dynon, so don't rely on my assumptions!

 

[dynonsupport]

I currently have a EFIS D-100,  EMS D-120, AP74, HS34, and 2 servos,  all of which which work great.  However I have no Attitude redundancy in the aircraft, so if I'm IMC and the EFIS D-100 fails I would be in pretty deep  

For the record, yes, we agree: the current panel configuration is not suitable for IMC flight if it has no "gyro" backups at all.

One option to upgrade my panel would be to replace the D-120 with a D-180, and use that box for the engine monitor, and revert to it for the EFIS in the event the D-100 failed.  A couple of questions:

Would I need another remote compass and OAT probe?  I think the answer to both questions is yes, however the OAT is only required for TAS and related functions, and is not an absolute requirement for this installation.  Can the OAT signal be 'split' and fed to two remote compasses?  Can I simply stack one remote compass on top of the other, or is this a no-no?

Our recommendation would be to leave the OAT connected to just one EDC, since it's not critical. DO connect and aalibrate the 2nd EDC, and yes it can be stacked with the other one.

Will the HS34 work with both boxes?  I THINK the answer is the HS34 would display identical information on both screens, correct?  If one screen failed, the HS34 would continue to work using the other EFIS box.  Same for the AP74, right?

One of the screens will be the master of the DSAB network. If that one fails, then the HS34 will go offline for the rest of that flight, and depending on what you have connected and where, you may lose some HSI sources on the remaining screen.

Is there anything else I would need to make this dual setup totally independent of each other?

A heated pitot is always a good idea for IMC.

Is there a backup battery option for the D-180, and will it also power the EMS?  Or just the EFIS?

Yes and yes.