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Position of the battery in the RV8

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jdelpeso(at)bellsouth.net
Guest

Posted: Wed Nov 15, 2006 2:07 pm Post subject: Position of the battery in the RV8

I'm ready to order the Van's wire harness kit for a RV-8. I need to  know if the battery will be aft or forward mounted. 

What is the experience of other builders with a O-360-A1A engine,Hartzell  propeller and 200 lbs. pilot?  

Thanks 

Jose del Peso (#80981) 

Madrid (Spain) 

 

   [quote][b]

Larry Bowen

Joined: 09 Jan 2006
Posts: 802
Location: NC, USA

Posted: Wed Nov 15, 2006 2:49 pm Post subject: Position of the battery in the RV8

I have the same config with battery in front.  It's  nose heavy solo, but I don't think I'd do it any different .

 

-

Larry Bowen

Larry(at)BowenAero.com

http://BowenAero.com

  



 [quote]         From: jdelpeso(at)bellsouth.net    [mailto:jdelpeso(at)bellsouth.net] 

Sent: Wednesday, November 15, 2006    9:07 PM

To: rv-list(at)matronics.com

Subject: RV-List:    Position of the battery in the RV8

   

    

   



   

 

      

I'm ready to order the Van's wire harness kit for a RV-8. I need to    know if the battery will be aft or forward mounted.   

What is the experience of other builders with a O-360-A1A engine,Hartzell    propeller and 200 lbs. pilot?    

Thanks   

Jose del Peso (#80981)   

Madrid (Spain)   

 

 	  Quote: 	
		  



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href="http://www.matronics.com/contribution">http://www.matronics.com/chref="http://www.matronics.com/Navigator?RV-List">http://www.matronics.com/Navigator?RV-List



	
[b]

_________________
Larry Bowen
RV-8 SOLD,
RV-7QB in progress...

bill(at)vondane.com
Guest

Posted: Wed Nov 15, 2006 3:40 pm Post subject: Position of the battery in the RV8

I have an O320 in my -8A, but I do have the nose  wheel so maybe it's close in weight...  I also have an MT 3 blade prop that  weights 38# with the spinner and screws...  I mounted my odyssey 625 in the  bottom part of the forward baggage compartment just behind the  firewall...

  

 I weight about 215 and it's a bit heavy in the  flair solo, but nothing I would ever complain about...  It also allows me  to load the crap out of it and never get out of CG...

  

 -Bill VonDane

 RV-8A - Colorado Springs

 www.rv8a.com

  

  

  

 ---

luckymacy(at)comcast.net
Guest

Posted: Wed Nov 15, 2006 4:47 pm Post subject: Position of the battery in the RV8

That's the same set up as a guy who hangars next to me.  He can't 3 point land without passenger or lots of baggage in the back.  I'd say put the battery in the back.  It will fly nicer solo without extra effort.  I have an angle valve engine, hartzell prop, battery in the back and I can 3 point right without a passenger/luggage either.  I like the way it trims out better with a passenger in the back so I would assume you'd overall like the way the plane solos with the battery back there too.  Depends I guess on how much you are going to fly solo vs how often you are going to take up a VERY heavy passenger.

  

 [quote]-------------- Original message -------------- 

From: <jdelpeso(at)bellsouth.net> 

     

 



 

 

  

I'm ready to order the Van's wire harness kit for a RV-8. I need to know if the battery will be aft or forward mounted. 

What is the experience of other builders with a O-360-A1A engine,Hartzell propeller and 200 lbs. pilot?  

Thanks 

Jose del Peso (#80981) 

Madrid (Spain) 

 

 	  Quote: 	
		  

	
[b]

lors01(at)msn.com
Guest

Posted: Wed Nov 15, 2006 7:28 pm Post subject: Position of the battery in the RV8

<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]-->  Larry (and you other IO - 360 / Hartzell RV-8 guys),  what was your  empty weight?

  

 I'm wondering how close I came to meeting my weight target on my Mazda 20B  three rotor powered RV-8.  The goal was to be no heavier than the Lyc  / Hartzell setup.    

  

 FWIW, I'm putting the battery just aft of rear baggage  area.  I'm solo most of the time and speed / fuel economy (I  fly a fixed GPH setting) is measurably better in my -4 when  loaded closer to aft CG.

  

 Tracy Crook  (getting ready to weigh RV-

 [quote]   ---

13brv3

Joined: 11 Jan 2006
Posts: 76

Posted: Thu Nov 16, 2006 6:01 am Post subject: Re: Position of the battery in the RV8

There's a good listing of various RV W&B figures at:

http://www.rvproject.com/wab/



As for where to put the battery, I've done it both ways now, and my current RV-8 (O-360, Hartzell) has an Odyssey battery on the firewall.  Tandems are always a compromise when it comes to CG, but at least the RV-8 offers a large front and rear baggage compartment to even things out. 



Bottom line is that the only time you will really NEED to keep the CG from being at the forward limit is if you have an inverted oil and fuel system, and plan to fly inverted.  I've been told that there isn't enough down elevator for inverted flight at the foward CG limit, but I don't know this for a fact.  I do know that my previous RV-8 had an aft mounted battery, and took a lot of down elevator to fly level inverted.  



Mounting an Odyssey battery aft might be about the best situation, but getting to the battery is a hassle, and you add weight by having to run a battery cable forward.  You could take that same couple lbs, and add it to the tail to make up the difference, and have the battery on the firewall where it's easier to get to.  That was my plan this time around, and so far, I'm happy with it.  



Cheers,

Rusty

michele.delsol(at)microsi
Guest

Posted: Thu Nov 16, 2006 6:09 am Post subject: Position of the battery in the RV8

Jose,  

   

A French girl (who does speak Spanish) responds to a Spanish guy in English via a US list – are we international or are we international?  

   

This issue was debated fairly recently in one of the lists as I asked the question. The consensus seems to have been that generally RV8s with CS are nose heavy when flying solo and difficult to three point. Based on all the discussion that my question generated, I went for the aft position – I’ll have a TMX-IO360, forward induction hence a snorkel up front with an MT prop and Skytech light weight starter. Time will tell whether this was the right choice.   

   

I do have a friend with an angle valve (200hp) and CS Hartzell – he had to put 10lbs in the tail to balance his plane out.  

   

Michèle  

RV8 – Finishing  

Paris – France  

Jose – el 1, 2 y 3 de junio el Vans Club de France organiza su encuentro anual. Vienen muchos britanicos, franceses, otros, y algunos españoles. Estas cordialmente invitado – el encuentro se hara en el centro de Francia en Nuits St. George – cerca de Beaune en la zona vinicola de burgoñia  

         

  

From: owner-rv-list-server(at)matronics.com [mailto:owner-rv-list-server(at)matronics.com] On Behalf Of jdelpeso(at)bellsouth.net

 Sent: jeudi 16 novembre 2006 03:07

 To: rv-list(at)matronics.com

 Subject: Position of the battery in the RV8  

  

     

   

    

   

    



    

    

I'm ready to order the Van's wire harness kit for a RV-8. I need to know if the battery will be aft or forward mounted.  

What is the experience of other builders with a O-360-A1A engine,Hartzell propeller and 200 lbs. pilot?   

Thanks  

Jose del Peso (#80981)  

Madrid (Spain)  

   

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n616tb(at)btsapps.com
Guest

Posted: Thu Nov 16, 2006 6:48 am Post subject: Position of the battery in the RV8

I had a buddy once who when flew with me couldn't trim his airplane enough

when he slowed to my speed.  He added a small door at the tail where he

could add a temporary weight.  Maybe that is also a good idea in this case.

Add the weight when you need it.



Tim



[quote] --

Larry Bowen

Joined: 09 Jan 2006
Posts: 802
Location: NC, USA

Posted: Thu Nov 16, 2006 10:48 am Post subject: Position of the battery in the RV8

1130 after paint.  See my site for a link to my W&B.



-- 

Larry Bowen

Larry(at)BowenAero.com

http://BowenAero.com



Tracy Crook wrote:

[quote] Larry (and you other IO - 360 / Hartzell RV-8 guys),  what was your empty

 weight?



 I'm wondering how close I came to meeting my weight target on my Mazda 20B

 three rotor powered RV-8.  The goal was to be no heavier than the Lyc /

 Hartzell setup.



 FWIW, I'm putting the battery just aft of rear baggage area.  I'm solo

 most of the time and speed / fuel economy (I fly a fixed GPH setting) is

 measurably better in my -4 when loaded closer to aft CG.



 Tracy Crook  (getting ready to weigh RV-

   ---

_________________
Larry Bowen
RV-8 SOLD,
RV-7QB in progress...

rice737(at)msn.com
Guest

Posted: Thu Nov 16, 2006 3:43 pm Post subject: Position of the battery in the RV8

I just moved my battery from front to back in my 8 after speaking with a 

friend who has the same engine and prop I plan to fly, TMX IO360 and a 

Hartzell blended airfoil.  He has been flying around with a case of oil in 

the back so the landings are a  bit easier.  Since I usually will be solo, I 

think that is the best way to go.  I shouldn't have to get to the battery 

that often, so access is not a priority.  I may add a ground power socket 

aft of the baggage compartment.

Paul Rice

rv8 finish kit



 	  Quote: 	
		  From: <jdelpeso(at)bellsouth.net>

Reply-To: rv-list(at)matronics.com

To: <rv-list(at)matronics.com>

Subject: Position of the battery in the RV8

Date: Wed, 15 Nov 2006 18:07:03 -0800

I'm ready to order the Van's wire harness kit for a RV-8. I need to know if 

the battery will be aft or forward mounted.



What is the experience of other builders with a O-360-A1A engine,Hartzell 

propeller and 200 lbs. pilot?



Thanks



Jose del Peso (#80981)



Madrid (Spain)

rv8ch

Joined: 10 Jan 2006
Posts: 250
Location: Switzerland

Posted: Sun Nov 19, 2006 11:52 am Post subject: Position of the battery in the RV8

I'm currently adding my Trio Avionics altitude hold servo in the back of 

my RV8.  I've got the batteries in the back, and I can tell you that it 

does add a bit of complexity to the installation of the servo.  Just 

something else to think about...



-- 

Mickey Coggins

http://www.rv8.ch/

#82007 finishing

do not archive

_________________
Mickey Coggins
http://www.rv8.ch/

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