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  #71  
Old 01-07-2018, 02:06 PM
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rongawer rongawer is offline
 
Join Date: Dec 2007
Location: Brentwood, CA
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I installed a GTN625, which is physically the same size. The 650 needs a second power supply and antenna set and would be very doable.
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- RV12, N975G, SN 120840, Build in progress...finishing up.
- BE58, N1975G, stimulating the economy one flight at a time.
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  #72  
Old 01-07-2018, 04:34 PM
ben barron ben barron is offline
 
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Location: Fall City, WA
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Re reading the post sounds like the 625 may be better (cost) option for me then. Do you have to have the G3x too? Mind sharing any install photos you might have?
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  #73  
Old 01-07-2018, 06:34 PM
BobTurner BobTurner is online now
 
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Location: Livermore, CA
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Quote:
Originally Posted by ben barron View Post
Re reading the post sounds like the 625 may be better (cost) option for me then. Do you have to have the G3x too?
The Garmin TSO’d gps boxes will interface to virtually all brands of EFIS boxes, or buy a stand-alone CDI ($2K!)
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  #74  
Old 01-07-2018, 08:24 PM
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rongawer rongawer is offline
 
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Location: Brentwood, CA
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Quote:
Originally Posted by ben barron View Post
Re reading the post sounds like the 625 may be better (cost) option for me then. Do you have to have the G3x too? Mind sharing any install photos you might have?
Sorry for the image size; it’s quite a silly dance you have to go through to post a photo on this forum. My one request would be to allow just posting photos here.

Soap box statements aside, here’s my panel from a while back.


Yes, I do have a G3X. Note the GTN625 in the panel center.
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Ron Gawer

- RV12, N975G, SN 120840, Build in progress...finishing up.
- BE58, N1975G, stimulating the economy one flight at a time.

Last edited by rongawer : 01-07-2018 at 08:59 PM. Reason: PHoto adjustment
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  #75  
Old 01-07-2018, 08:41 PM
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RV8JD RV8JD is offline
 
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Quote:
Originally Posted by rongawer View Post
Sorry for the image size; it’s quite a silly dance you have to go through to post a photo on this forum. My one request would be to allow just posting photos here.

Soap box statements aside, here’s my panel from a while back.
How about these. Just add an "m" or an "l" after photo name. For example:
"... i.imgur.com/UyE1Oi4m.jpg"


or
"... i.imgur.com/UyE1Oi4l.jpg"



Hope that helps.
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Arlington, WA (KAWO)
RV-8, 300 Tach Hours
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- Out with the Old, In with the New
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RV-8, 1938 Tach Hours (Pic 1),(Pic 2) - Sold

Glasflügel H-201B Standard Libelle, N564NS - Sold
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Last edited by RV8JD : 01-07-2018 at 08:51 PM.
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  #76  
Old 01-07-2018, 08:58 PM
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rongawer rongawer is offline
 
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Quote:
Originally Posted by RV8JD View Post
Hope that helps.
VERY helpful! Thank you!
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Ron Gawer

- RV12, N975G, SN 120840, Build in progress...finishing up.
- BE58, N1975G, stimulating the economy one flight at a time.
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  #77  
Old 01-08-2018, 10:26 PM
ben barron ben barron is offline
 
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Location: Fall City, WA
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You have made a lot of modifications to the standard RV12 panel. Impressive.
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  #78  
Old 01-10-2018, 12:49 PM
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rongawer rongawer is offline
 
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Thanks. I chose to use a single piece and cut it out myself, but retained all of the factory mounting holes and braces. It is admittedly a little overkill for an RV-12, but I thought, "why not?".
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Ron Gawer

- RV12, N975G, SN 120840, Build in progress...finishing up.
- BE58, N1975G, stimulating the economy one flight at a time.

Last edited by rongawer : 01-10-2018 at 12:52 PM.
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  #79  
Old 01-23-2018, 10:38 AM
Rrhsch Rrhsch is offline
 
Join Date: Aug 2013
Location: Oconomowoc, WI
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Default More power please!

I have been contemplating adding the GTN 625/650 to my flying ELSA RV12. The power budget is a problem if you want a back-up AHARS and heated Pitot tube. There have been discussions on this site regarding this issue but the solutions were completed as an EAB with extensive mods.

My goal is to leave the stock electrical system intact, not modify the cowl and add the additional amps needed to safely run everything. I was thinking I could add an IFR buss fed from the battery with the addition of a B&C pad mount alternator. This will supply an extra 25 amps of power during a 5000 RPM cruise speed. Successfully doing this is the problem. I have not found a sound way to have both alternators simultaneously charge a single battery. Everything I have read said to only have one alternator run at a time on a single battery.

I may need to add a second battery included with a second electrical system. Crowbar over-voltage protection is needed for a two Earth-X battery system (weight). One battery is charged by the B&C and the other charged by the standard Rotax alternator. Electrical load would be divided (IFR/VFR) between the two alternators. The batteries should be moved behind the baggage compartment for weight and balance reasons.

I would add a crossover switch for additional safty. If the Rotax voltage regulator/alternator failed, the Rotax (VFR) alternator/battery could be taken off line and the B&C could take over both busses (VFR/IFR). I thought about making the B&C the primary alternator but, it doesn't develop any amps until the Rotax is turning over 3000 rpm. Waiting for an IFR clearance for an extended period of time could cause a battery problem. Just wondering if the brain trust on here has any advice/answers?
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  #80  
Old 01-25-2018, 03:40 PM
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rongawer rongawer is offline
 
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Location: Brentwood, CA
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I can't speak to power from a Rotax, but I can share what my avionics package uses for reference. With everything turned on, it pulls about 7.6A in steady state with a peak of bout 9.3A when transmitting. Add 4A for a fuel pump and 8A for my ECU (ignition and fuel injection), along with about 4A for lights and you're at about 26A. I have a 50A alternator, so it works fine for me.

I don't know that you'll need an additional alternator if you're just adding a GTN625; it doesn't pull much power at all with about 1.5A indicated on my VP-X. The 650 will use an additional ~5A for the COM and NAV units though.

My heated pitot spikes up about 7A when turned on, but quickly runs down to just over 1A steady; it will be closer to 2A at 20F. The additional GSU25 (Garmin ADAHRS) only pulls about .25A, so it's fairly negligible.
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Ron Gawer

- RV12, N975G, SN 120840, Build in progress...finishing up.
- BE58, N1975G, stimulating the economy one flight at a time.

Last edited by rongawer : 01-25-2018 at 03:44 PM. Reason: Heated pitot add
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