Matronics Email Lists :: View topic

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Aft battery

Matronics Email Lists Forum Index -> Europa-List

View previous topic :: View next topic

Author Message

Fergus Kyle

Joined: 03 Jun 2007
Posts: 291
Location: Burlington ON Canada

Posted: Sat Jan 02, 2010 7:34 am Post subject: Aft battery

I seem to recall someone placing his/her battery aft to balance the aircraft.  I would like to ask if that someone would be kind enough to describe how the square-type item is mounted in the roundie-kind aft fuselage – contoured bulkheads, foam filler, size plywood etc.  

Thanks, Ferg  

Still wiring     [quote][b]

frans(at)paardnatuurlijk.
Guest

Posted: Sat Jan 02, 2010 8:17 am Post subject: Aft battery

On 01/02/2010 03:23 PM, Fergus Kyle wrote:

 	  Quote: 	
		   I seem to recall someone placing his/her battery aft to balance the

 aircraft.  I would like to ask if that someone would be kind enough to

 describe how the square-type item is mounted in the roundie-kind aft

 fuselage - contoured bulkheads, foam filler, size plywood etc.


	


I made an aluminium tray for the batteries, that "hangs" on the bagage

floor.

This tray is also the mount for the starter relay, and mass rail.

The bagage floor is stronger than the fuselage at that point, allows for

easy access, and you don't have to drill holes through the fuselage skin.



Frans

rlborger(at)mac.com
Guest

Posted: Sat Jan 02, 2010 10:12 am Post subject: Aft battery

Ferg,



Go to my build web site, album Year#7 Q3 2008, page 5 and you will see a couple pics on how I handled the situation.

My friend Tommy made the base and strap for the battery so it is metal.  When a friend asks to help, you don't question, you accept the assistance.

I probably would have done something with a thin sheet of urethane foam covered in a ply or two of fiberglass, but this worked very well.

You can see that it was bonded under the starboard side baggage bay with Araldite so there are no holes in the fuselage and it's not going anywhere.

Hope this helps...

Check six,

 Bob Borger

Europa Kit #A221 N914XL, XS Mono, Intercooled 914, Airmaster C/S

http://www.europaowners.org/N914XL

Aircraft Flying!

3705 Lynchburg Dr.

Corinth, TX  76208

Home:  940-497-2123

Cel:  817-992-1117





 

 

On Jan 2, 2010, at 8:23, Fergus Kyle wrote:

 	  Quote: 	
		    

I seem to recall someone placing his/her battery aft to balance the aircraft.  I would like to ask if that someone would be kind enough to describe how the square-type item is mounted in the roundie-kind aft fuselage – contoured bulkheads, foam filler, size plywood etc.

Thanks, Ferg

Still wiring      	  Quote: 	
		  



href="http://www.matronics.com/Navigator?Europa-List">http://www.matronics.com/Navigator?Europa-List

href="http://forums.matronics.com/">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/contribution

rparigoris

Joined: 24 Nov 2009
Posts: 796

Posted: Sat Jan 02, 2010 10:42 am Post subject: Aft battery

Hi Ferg"someone placing his/her battery aft to balance the  aircraft."Here is info on my aft battery install: http://www.europaowners.org/forums/gallery2.php?g2_itemId=30710Note the "Kool" balsa battery hold down. If by chance I needed to move the box, easy cut bid and move.If by chance you are still nose heavy, here is an idea I implimented that also removes about 15% of the stress on the stabilator drive pins:[url=http://www.europaowners.org/forums/gallery2.php?g2_itemId 8658]http://www.europaowners.org/forums/gallery2.php?g2_itemId 8658[/url]Ron Parigoris   [quote][b]

ptag.dev(at)tiscali.co.uk
Guest

Posted: Sat Jan 02, 2010 2:25 pm Post subject: Aft battery

Hi! Ferg  

Happy New Year .  

I started with a serious weight and balance issue with the Jabiru 6 seemingly needing the battery mounted aft. I made a base out of foam and glassed it all to the floor with hard points and  through bolts to restrain the battery …..until I found that the length of the leads so needed wouldn’t start the damn engine! Reverted to mounting them on the passenger side foot well within about 18” of the starter and then never had a problem with weight and balance OR starting! But have two Oddesy 13AH Batteries in parallel and a heavy duty starter on my now 914 !  

Happy Days !  

Regards  

Bob Harrison G-PTAG   

         

  

From: owner-europa-list-server(at)matronics.com [mailto:owner-europa-list-server(at)matronics.com] On Behalf Of Fergus Kyle

 Sent: 02 January 2010 14:23

 To: EUROPALIST

 Subject: Aft battery  

  

   

I seem to recall someone placing his/her battery aft to balance the aircraft.  I would like to ask if that someone would be kind enough to describe how the square-type item is mounted in the roundie-kind aft fuselage – contoured bulkheads, foam filler, size plywood etc.  

Thanks, Ferg  

Still wiring   	  Quote: 	
		              - The Europa-List Email Forum ---> http://www.matronics.com/Navigator?Europa-List 	
0 	  Quote: 	
		   	
1 	  Quote: 	
		   	
2 	  Quote: 	
		   	
3 	  Quote: 	
		   	
4 	  Quote: 	
		   	
5 	  Quote: 	
		   	
6 	  Quote: 	
		   	
7 	  Quote: 	
		   	
8 	  Quote: 	
		   	
9

       [quote][b]

milneab(at)btinternet.com
Guest

Posted: Sun Jan 03, 2010 12:15 am Post subject: Aft battery

Make a battery box with a rim (glass and resin  - I used the transit box as a form) and bond it to the  baggage bay floor clear of the flap tube so that a hatch is the lid  .    That saves wrinkling the bottom fuselage skin, holds  the battery securely when the hatch is screwed down and retains the battery  connection washers and wing nuts when you drop them.

  

 Alasdair Milne

  

 ---

davidjoyce(at)doctors.org
Guest

Posted: Sun Jan 03, 2010 3:40 am Post subject: Aft battery

Ferg, It seems to me there are real advantages in having the battery forward 

(as Bob Harrison + convenient access). Even with a 914, a Woodcomp SR3000, a 

17 amp hr Odyysey,  and a very full panel, I found that a forward battery 

gave me an ideal C of G position with 3 lbs of lead fixed to the rudder post 

in the fin. 3 lbs is probably less than the wire needed to get decent 

performance from an aft placed battery. So I would recommend planning 

forward until proved otherwise.

Regards, David Joyce, G-XSDJ

---

grahamsingleton(at)btinte
Guest

Posted: Sun Jan 03, 2010 4:58 am Post subject: Aft battery

Ferg

you are not overweight so I agree with David

Graham



David Joyce wrote:

[quote] 

 <davidjoyce(at)doctors.org.uk>



 Ferg, . So I would recommend planning forward until proved otherwise.

 Regards, David Joyce, G-XSDJ

 ---

rparigoris

Joined: 24 Nov 2009
Posts: 796

Posted: Sun Jan 03, 2010 10:23 am Post subject: Aft battery

Hi DavidI calculated CG with battery mounted on firewall versus aft mounting butting baggage ribs. Even with using number 4 copper Tefzel cable there is a weight savings with an aft battery. I have my PC545 mounted aft of baggage bulkhead and there is even more of a weight savings and using #4 copper clad aluminium wire as sold by Eric Jones, even more. One advantage for me is i am not using a battery main relay, but instead a switch from Flaming river mounted on the headrest. I also have a selection of circuit breakers and switches just aft of passeneger headrest. an aft battery easily allows this. For simplicity no question battery on firewall, for weight savings aft mounted.Here is stuff in headrest that aft mounting makes possible that moves CG aft as well:http://www.europaowners.org/forums/gallery2.php?g2_itemId=30502I have my shoulder harness mounted just aft of rear door closeout so passenger headrest need not be very structural:[url=http://www.europaowners.org/forums/gallery2.php?g2_itemId 7386]http://www.europaowners.org/forums/gallery2.php?g2_itemId 7386[/url]Switch saves weight and power over relay, details:http://www.europaowners.org/forums/gallery2.php?g2_itemId=30683Ron Parigoris   [quote][b]

frans(at)paardnatuurlijk.
Guest

Posted: Sun Jan 03, 2010 1:58 pm Post subject: Aft battery

On 01/03/2010 12:37 PM, David Joyce wrote:

 	  Quote: 	
		   

 <davidjoyce(at)doctors.org.uk>

 

 Ferg, It seems to me there are real advantages in having the battery

 forward (as Bob Harrison + convenient access). Even with a 914, a

 Woodcomp SR3000, a 17 amp hr Odyysey,  and a very full panel, I found

 that a forward battery gave me an ideal C of G position with 3 lbs of

 lead fixed to the rudder post in the fin. 3 lbs is probably less than

 the wire needed to get decent performance from an aft placed battery.


	


I have an aft placed battery (well, actually two), and the wires needed

weigh closer to 1 lbs than 2 lbs (and not even substracting the weight

of the wires you would need anyway with a forward placed battery.) "Aft"

may sound like it is awfully far away, but in reality, it is just a few

feet more than on the footwell, nothing to worry about. I used the

copper clad aluminium wires from Eric Jones.



The 914 cranks superb, as if the battery is placed next to the engine.

I still don't know how my C of G will turn out (weather isn't

cooperating; I would have to trailer the ship to a weighing station, but

don't want to do this on roads covered with snow and salt), but I

suspect that with a 914 with dual alternator, intercooler and SR3000, an

aft placed battery has an advantage here.



To carry around 3 lbs of non functional lead, after all the painstaking

weigh savings during the built, is well, quite a waste to my opinion,

and something to be avoided if possible.



Frans

Display posts from previous:

	Matronics Email Lists Forum Index -> Europa-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum