VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics


Go Back   VAF Forums > Model Specific > RV-8/8A
Register FAQ Members List Calendar Today's Posts

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 02-07-2013, 10:03 AM
buzzywph buzzywph is offline
 
Join Date: Jul 2006
Location: lake geneva wi
Posts: 5
Red face Battery location RV-8

Any completed RV8 fliers out there with an IO-360 (180) hp glass cockpit and a constant speed prop give me any direction on where I should plan to put the battery (fwd or aft) based on CG considerations? Thanks, Bill N159WP.
Reply With Quote
  #2  
Old 02-07-2013, 10:16 AM
Andy Hill's Avatar
Andy Hill Andy Hill is offline
 
Join Date: Dec 2005
Posts: 976
Default

As a wild guess, I would say it depends on:
Quote:
and a constant speed prop
i.e. which one? A Hartzell = almost certainly in the rear, a lightweight MT/Whirlwind it might be either...

Other factors might be what sort of battery, ignition, engine "extras" (e.g. inverted system), and whether you will worry about the aft aeros limit?
__________________
Andy & Ellie Hill
RV-8 G-HILZ
RV-3B G-HILI very slow build
RV8tors
Reply With Quote
  #3  
Old 02-07-2013, 10:39 AM
Pat Stewart Pat Stewart is offline
 
Join Date: Jan 2005
Location: Granbury Texas
Posts: 1,136
Default

Huge amounts of data available on this one if you do a search.
Reply With Quote
  #4  
Old 02-07-2013, 10:42 AM
buzzywph buzzywph is offline
 
Join Date: Jul 2006
Location: lake geneva wi
Posts: 5
Default Rv8 bat location

Plan to use a Hartzell cs prop no inverted system with the concord 25rg battery. Thanks for your input. Most people I've talked with say the airplane is nose heavy with the battery upfront.
Reply With Quote
  #5  
Old 02-07-2013, 10:54 AM
DEWATSON DEWATSON is offline
 
Join Date: May 2007
Location: Quincy, Florida
Posts: 680
Default battery

Put it in the back. I ended up moving mine to the back. Glass panel and constant speed Hartzell.
Reply With Quote
  #6  
Old 02-07-2013, 11:02 AM
buzzywph buzzywph is offline
 
Join Date: Jul 2006
Location: lake geneva wi
Posts: 5
Default Rv8 battery location

Ok, thanks that's what I thought. Did you end up using the Concord (23.5 lbs or the Odyssey 14.5 lbs) in back or something else?
Reply With Quote
  #7  
Old 02-07-2013, 11:14 AM
scsmith scsmith is offline
 
Join Date: Jan 2008
Location: Ashland, OR
Posts: 2,574
Default battery choice

The Odessey is light enough that it doesn't matter nearly so much where you put it.
If you use the Concorde, you should definitely put it in the back. You can always switch to the Odyssey later with relatively little implications.
__________________
Steve Smith
Aeronautical Engineer
RV-8 N825RV
IO-360 A1A
WW 200RV
"The Magic Carpet"
Hobbs 625
LS6-15/18W sailplane SOLD
bought my old LS6-A back!!
VAF donation Jan 2020
Reply With Quote
  #8  
Old 02-07-2013, 11:32 AM
buzzywph buzzywph is offline
 
Join Date: Jul 2006
Location: lake geneva wi
Posts: 5
Default RV8 batt loc

Thanks Steve, that helps. As I will have a back up bat for the efis, I think the smaller bat in back makes overall sense for weight and CG.
Reply With Quote
  #9  
Old 02-07-2013, 12:38 PM
humptybump humptybump is offline
 
Join Date: Feb 2011
Location: USA
Posts: 3,179
Default

Down the road, if you so choose, you can go with the even lighter LiFePO4 battery technology.
Reply With Quote
  #10  
Old 02-07-2013, 09:06 PM
Tom Schad Tom Schad is offline
 
Join Date: Apr 2006
Location: Gainesville, Texas
Posts: 45
Default

My RV-8 has an 0-360 and Hartzel Constant Speed. It has the battery in the back. When flying solo or with a light weight person in the back, I keep my tool bag, survival kit and CLAW etc. in the back. The RV-8 lands a lot easier, in my opinon, with the CG towards the rear instead of on the front limits, as it would solo with no weight in the back. Put it in the back!
Reply With Quote
Reply



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 06:46 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.