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08-30-2015, 08:15 AM
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Join Date: Dec 2013
Location: Baton Rouge, LA
Posts: 1,055
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Backup Attitude Reference
With IFR in mind, any thoughts on the best way to have a redundant attitude reference? Ideally it would mount in the panel, and be fully electric. How would it fit in with the big touch screen displays? Which one has a good battery backup?
I like the dynon pocket panel units that just sit on the dash or suction cup in place in a pinch; I suppose that it doesn't have to be constantly running on the dash if it is a backup item to a pretty reliable primary. But it isn't a super clean and tidy solution.
Do you think the RV14 stock panels we will be offered will have anything like this?
__________________
Ser 104142, RV-14A flying - N1463 
Ser 83825, RV-8 building - N8638? 
USN Ret, Urologist, AME, Repeat Offender
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08-30-2015, 08:22 AM
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Join Date: Nov 2013
Location: Prescott, AZ
Posts: 1,614
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The Dynon was not bright enough for me in the RV cockpit. The Grand Rapids mini is perfect. Read some of the past threads on the opinions and experience, you might like it.
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"Kindness is never a bad plan."
exemption option waived. Donation appropriate.
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08-30-2015, 08:43 AM
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Join Date: Nov 2006
Location: Saint Simons Island , GA
Posts: 1,523
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Another Mini Vote
I suggest you look at the GrandRapids Mini line of attitude indicators. Full of features, easy to install, small foot print and extremely readable.
Just being implemented are new features including ADSB, Engine displays from the EIS, Blue Tooth.
They have a back up battery option also.
I replaced my Dynon Pocket, which I really liked by the way, with the MiniX and am extremely happy with that choice.
__________________
Jerry "Widget" Morris
RV 8, N8JL, 3,000+ hours on my 8.
VAF #818
Saint Simons Island, GA. KSSI
PIF 2008, 2009, 2010, 2011,2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
 I just wish I could afford to live the way I do
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08-30-2015, 08:52 AM
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Join Date: Dec 2013
Location: Baton Rouge, LA
Posts: 1,055
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The Mini does look good. Looks like it would take static and pitot inputs too for truly independent function too. Is there any way to tie the GPS antenna input to the ship GPS antenna? Must be a splitter of some sort for that.... Or is the 3db loss a problem when that is done?
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Ser 104142, RV-14A flying - N1463 
Ser 83825, RV-8 building - N8638? 
USN Ret, Urologist, AME, Repeat Offender
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08-30-2015, 09:31 AM
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Join Date: Jun 2005
Location: Woodinville, WA
Posts: 1,499
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GPS antennas can't be split. They get power from the GPS device, and you can't share that power.
Don't forget the Dynon D6 also as a panel mounted backup, integrated battery backup, with over a decade of history as both a primary and backup EFIS.
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08-30-2015, 09:55 AM
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Join Date: Oct 2005
Location: Independence, OR
Posts: 396
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Quote:
Originally Posted by JDA_BTR
With IFR in mind, any thoughts on the best way to have a redundant attitude reference? Ideally it would mount in the panel, and be fully electric.
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I went with a TruTrak ADI. It's mounted in the panel, easy to read, and part of my regular instrument scan. No suction cups, cigarette lighter plug connections, or view of the sky required. I opted for no separate backup battery but wired it to my E-buss.
Most of all, I like how well it work for setting climb and bank rates instead of pitch and bank attitudes.
I believe the TruTrak ADI is discontinued now (I bought mine used) but TruTrak also makes the Gemini ADI although I have no firsthand experience with it.
--
Joe
__________________
Joe Dubner
RV-8A
Independence, OR
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08-30-2015, 07:28 PM
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VAF Moderator / Line Boy
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Join Date: Jan 2005
Location: Dayton, NV
Posts: 12,256
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I've used pretty much all of the ones mentioned, and compared to flying needle/ball/airspeed, every single one of them is worth their weight in gold!
Honestly, they all work well enough - I prefer disimilar redundancy, so I choose one from a different manufacturer than my main EFIS.
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Paul F. Dye
Editor at Large - KITPLANES Magazine
RV-8 - N188PD - "Valkyrie"
RV-6 (By Marriage) - N164MS - "Mikey"
RV-3B - N13PL - "Tsamsiyu"
A&P, EAA Tech Counselor/Flight Advisor
Dayton Valley Airpark (A34)
http://Ironflight.com
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08-31-2015, 06:10 AM
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Join Date: Dec 2006
Location: New Orleans, LA
Posts: 474
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Backup
Quote:
Originally Posted by JDA_BTR
With IFR in mind, any thoughts on the best way to have a redundant attitude reference? Ideally it would mount in the panel, and be fully electric. How would it fit in with the big touch screen displays? Which one has a good battery backup?
I like the dynon pocket panel units that just sit on the dash or suction cup in place in a pinch; I suppose that it doesn't have to be constantly running on the dash if it is a backup item to a pretty reliable primary. But it isn't a super clean and tidy solution.
Do you think the RV14 stock panels we will be offered will have anything like this?
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I put in the GRT Mini as a backup for the G3X, totally different system, has a good battery backup. It uses it's own GPS, small antenna that I plan to mount under the cowling. Uses the same pitot and static tubes off a T of the Garmin. Has it's own magnetometer, which I mounted on a shelf towards the back with the Garmin and it's own OAT, which is mounted on the other wing in the same spot as the Garmin OAT by the inboard access panel. Everything not totally connected yet, but no smoke!

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Stoney
First RV-14 Flight 04/17/2016
Serial #140087, N214SW - Sold
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08-31-2015, 07:00 AM
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Join Date: Jul 2009
Location: Mojave
Posts: 4,652
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Another fairly inexpensive option is the portables, like the Stratus. If you are running a tablet as an EFB, then why not have yet another line of defense?
__________________
WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.
Michael Robinson
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Harmon Rocket II -SDS EFI
RV-8 - SDS CPI
1940 Taylorcraft BL-65
1984 L39C
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08-31-2015, 08:42 AM
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Join Date: Jan 2005
Location: Ontario, Canada
Posts: 1,544
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I have a 4500 AFS as my main EFFIS screen. My official backup is a Gemini from TruTrak. The Gemini works fine, but for me, 60 year old eyes, the screen is too small. Also I find the touch screen settings to be a bit fussy. Setting the barometer in rough IFR would be a challenge.
Since I started using my Stratus/foreflight system it has become my main backup instrument. It is highly accurate in terms of pitch and roll and matches my EFFIS. I find it easy to use and is, of course, much larger then the Gemini. The only downside is that the altitude, and ground speed are GPS derived and as such not appropriate for approaches. I do have a standard round Altimeter and Airspeed which will cover those issues in my plane.
I tested the system in a friend's Cirrus and it matched his screens exactly, right down to showing the plane slightly out of trim.
__________________
Tom Martin RV1 pilot 4.6hours!
CPL & IFR rated
EVO F1 Rocket 1000 hours,
2010 SARL Rocket 100 race, average speed of 238.6 knots/274.6mph
RV4, RV7, RV10, two HRIIs and five F1 Rockets
RV14 Tail dragger
Fairlea Field
St.Thomas, Ontario Canada, CYQS
fairleafield@gmail.com
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