Relocate the battery

[Kodiakflyer]

Thanks very much, Gents.

[Pinecone]

FYI, the picture looks like mine battery in my 252.

 

[vik]

  On 8/31/2018 at 7:32 PM, BDPetersen said:

Too bad the EarthX battery is not approved for certified a/c.

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Actually, it is approved for certified a/c. Not all, but Mooney with aft battery is included.

Vik

 

[jamesm]

Did you have to increase the cable size (AWG)  when relocating battery to  Aft of  baggage compartment location?

How noticeable is it in pitch axis after relocation on a short body C/E model?

 

Thanks,

James '67C

[jamesm]

  On 9/1/2018 at 12:22 AM, N201MKTurbo said:

You see the negative battery lead bolted to the shelf.

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I read that you cleaned up the contacting surface of the battery shelf for the ground. Would there be any benefit from running a separate ground to engine compartment (other than more weight)?

I was thinking in terms in corrosion (dissimilar metals ?) and  improving conductivity? 

Could there less noise generated, if a separate ground was ran? I was thinking in terms of  (G5's) magnetometer, autopilot (GFC500 CAN bus ) servo(s) , rotating beacon and com antennas are back there in the tail section.

 

Thanks in advance,

James '67C

[N201MKTurbo]

  On 5/23/2024 at 1:53 AM, jamesm said:

I read that you cleaned up the contacting surface of the battery shelf for the ground. Would there be any benefit from running a separate ground to engine compartment (other than more weight)?

I was thinking in terms in corrosion (dissimilar metals ?) and  improving conductivity? 

Could there less noise generated, if a separate ground was ran? I was thinking in terms of  (G5's) magnetometer, autopilot (GFC500 CAN bus ) servo(s) , rotating beacon and com antennas are back there in the tail section.

 

Thanks in advance,

James '67C

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It wouldn’t hurt, but it would be a lot of work and a couple of pounds of cable. I would just clean up the shelf connections and call it a day.

[Ragsf15e]

  On 5/23/2024 at 1:53 AM, jamesm said:

I read that you cleaned up the contacting surface of the battery shelf for the ground. Would there be any benefit from running a separate ground to engine compartment (other than more weight)?

I was thinking in terms in corrosion (dissimilar metals ?) and  improving conductivity? 

Could there less noise generated, if a separate ground was ran? I was thinking in terms of  (G5's) magnetometer, autopilot (GFC500 CAN bus ) servo(s) , rotating beacon and com antennas are back there in the tail section.

 

Thanks in advance,

James '67C

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Once you clean the shelf connect point thoroughly to ensure good connection, then you’re using the entire airframe as your negative conductor, so it should be just fine.  Still need to ensure the engine, instruments, etc have their own good connection to this awesome (and big) grounding source!

[TheMooneyAnomaly]

Let's crack this one open again and reverse it!  In my case, I'm looking to do the opposite - I'm going from a 3 blade metal prop to a 2 blade carbon fiber prop weighing 35lbs less.

I've already gone from a heavy battery to an EarthX battery in the rear empennage but my balance will still be challenging if I have adults in the back seat and/or cargo in the cargo hold.

My intention is to relocate my now smaller, lighter battery from the rear to the avionics bay.

My aircraft was manufactured in 67 but has a 68 SN#.  It is an M20F. 

Might anyone have done the reverse? Or have detailed photos of a similar aircraft with the battery up front?

Thank you!

[McMooney]

how's the EarthX working for you?  My battery is going on 6 years old, getting about time to replace it.

[TheMooneyAnomaly]

  On 4/15/2025 at 7:15 PM, McMooney said:

how's the EarthX working for you?  My battery is going on 6 years old, getting about time to replace it.

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So far, so good! I'm only about 12 hours of flight time into it.

[cliffy]

What are you calling the "avionics bay"?

Just behind the rear seat? 

If you can use all factory parts and mounting locations then its just a log book sign off as a minor alteration (43.13 has the details) providing the factory mounted a battery where you want to put one.