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craigtxtx(at)yahoo.com
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 Posted: Thu Oct 02, 2008 2:56 pm Post subject: RV8A Weight and balance |
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I weighed my RV8A and was somewhat surprised at the results. I have a Superior O-360 normally aspirated engine, Sensenich fixed pitch propeller, and forward mounted lightweight battery. The empty weight worked out to 1080 lb with a CG at 74.8" (as measured using a datum 70" forward of the leading edge). With only the pilot (220 lb) on board, I need between 20 and 30 lb of ballast in the rear baggage compartment to be within the acceptable CG with maximum or minimum fuel respectively. Is this typical for an 8A? With a fixed pitch propeller and lightweight battery I was expecting to be not quite so nose heavy. Have others had similar results?
Thanks in advance for your help.
Craig Gallenbach
RV8A, N184CG ........ almost ready to fly
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carl.froehlich(at)cox.net
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| Posted: Thu Oct 02, 2008 4:02 pm Post subject: RV8A Weight and balance |
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Similar results for my 8A (two Odyssey 625 batteries mounded 6”- 8” aft of the firewall and a Hartzell CS prop). I have a 10+ pound survival/tool kit on the rear baggage shelf that brings the CG inside the forward limit when solo. When solo however I tend to also put a case of oil in rear luggage compartment, unless of course I have other stuff to haul.
The good news is I have had some real beefy boys in the back and the CG was still well within limits. At some point I may move one of the two batteries aft if I am taking the plane down for some other major modification. This is certainly not an operational problem.
For all other 8A builders using a parallel valve (I)O-360, recommend you consider mounting your battery aft, or if you are a two battery ship one battery aft and perhaps the other in the forward baggage compartment well.
Carl Froehlich
RV-8A (450 hrs)
RV-10 (fuselage)
From: owner-rv-list-server(at)matronics.com [mailto:owner-rv-list-server(at)matronics.com] On Behalf Of Craig Gallenbach
Sent: Thursday, October 02, 2008 6:56 PM
To: RV list; SERV
Subject: RV8A Weight and balance
I weighed my RV8A and was somewhat surprised at the results. I have a Superior O-360 normally aspirated engine, Sensenich fixed pitch propeller, and forward mounted lightweight battery. The empty weight worked out to 1080 lb with a CG at 74.8" (as measured using a datum 70" forward of the leading edge). With only the pilot (220 lb) on board, I need between 20 and 30 lb of ballast in the rear baggage compartment to be within the acceptable CG with maximum or minimum fuel respectively. Is this typical for an 8A? With a fixed pitch propeller and lightweight battery I was expecting to be not quite so nose heavy. Have others had similar results?
Thanks in advance for your help.
Craig Gallenbach
RV8A, N184CG ........ almost ready to fly
| Quote: | | http://www.matronics.com/Navigator?RV-List |
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Larry Bowen
Joined: 09 Jan 2006
Posts: 802
Location: NC, USA
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| Posted: Thu Oct 02, 2008 4:34 pm Post subject: RV8A Weight and balance |
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Glad to hear you are getting close, Craig!
--
Larry Bowen
Larry(at)BowenAero.com
http://BowenAero.com
On Thu, Oct 2, 2008 at 8:00 PM, Carl Froehlich <carl.froehlich(at)cox.net (carl.froehlich(at)cox.net)> wrote:
[quote]
Similar results for my 8A (two Odyssey 625 batteries mounded 6"- 8" aft of the firewall and a Hartzell CS prop). I have a 10+ pound survival/tool kit on the rear baggage shelf that brings the CG inside the forward limit when solo. When solo however I tend to also put a case of oil in rear luggage compartment, unless of course I have other stuff to haul.
The good news is I have had some real beefy boys in the back and the CG was still well within limits. At some point I may move one of the two batteries aft if I am taking the plane down for some other major modification. This is certainly not an operational problem.
For all other 8A builders using a parallel valve (I)O-360, recommend you consider mounting your battery aft, or if you are a two battery ship one battery aft and perhaps the other in the forward baggage compartment well.
Carl Froehlich
RV-8A (450 hrs)
RV-10 (fuselage)
From: owner-rv-list-server(at)matronics.com (owner-rv-list-server(at)matronics.com) [mailto:owner-rv-list-server(at)matronics.com (owner-rv-list-server(at)matronics.com)] On Behalf Of Craig Gallenbach
Sent: Thursday, October 02, 2008 6:56 PM
To: RV list; SERV
Subject: RV8A Weight and balance
I weighed my RV8A and was somewhat surprised at the results. I have a Superior O-360 normally aspirated engine, Sensenich fixed pitch propeller, and forward mounted lightweight battery. The empty weight worked out to 1080 lb with a CG at 74.8" (as measured using a datum 70" forward of the leading edge). With only the pilot (220 lb) on board, I need between 20 and 30 lb of ballast in the rear baggage compartment to be within the acceptable CG with maximum or minimum fuel respectively. Is this typical for an 8A? With a fixed pitch propeller and lightweight battery I was expecting to be not quite so nose heavy. Have others had similar results?
Thanks in advance for your help.
Craig Gallenbach
RV8A, N184CG ........ almost ready to fly
012 34567 89
0
[b]
| | - The Matronics RV-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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_________________
Larry Bowen
RV-8 SOLD,
RV-7QB in progress... |
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craigtxtx(at)yahoo.com
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| Posted: Fri Oct 03, 2008 4:41 am Post subject: RV8A Weight and balance |
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Thanks Carl. I was hoping that my lighter prop and single battery would make my plane less nose heavy. After looking at the table of other RV8A CGs, I'm going to recheck my wheel location measurements. I'm pretty confident of the weights.
Craig
--- On Thu, 10/2/08, Carl Froehlich <carl.froehlich(at)cox.net> wrote:
| Quote: | From: Carl Froehlich <carl.froehlich(at)cox.net>
Subject: RE: RV8A Weight and balance
To: rv-list(at)matronics.com
Date: Thursday, October 2, 2008, 7:00 PM
Similar results for my 8A (two Odyssey 625 batteries mounded 6”- 8” aft of the firewall and a Hartzell CS prop). I have a 10+ pound survival/tool kit on the rear baggage shelf that brings the CG inside the forward limit when solo. When solo however I tend to also put a case of oil in rear luggage compartment, unless of course I have other stuff to haul.
The good news is I have had some real beefy boys in the back and the CG was still well within limits. At some point I may move one of the two batteries aft if I am taking the plane down for some other major modification. This is certainly not an operational problem.
For all other 8A builders using a parallel valve (I)O-360, recommend you consider mounting your battery aft, or if you are a two battery ship one battery aft and perhaps the other in the forward baggage compartment well.
Carl Froehlich
RV-8A (450 hrs)
RV-10 (fuselage)
From: owner-rv-list-server(at)matronics.com [mailto:owner-rv-list-server(at)matronics.com] On Behalf Of Craig Gallenbach
Sent: Thursday, October 02, 2008 6:56 PM
To: RV list; SERV
Subject: RV8A Weight and balance
I weighed my RV8A and was somewhat surprised at the results. I have a Superior O-360 normally aspirated engine, Sensenich fixed pitch propeller, and forward mounted lightweight battery. The empty weight worked out to 1080 lb with a CG at 74.8" (as measured using a datum 70" forward of the leading edge). With only the pilot (220 lb) on board, I need between 20 and 30 lb of ballast in the rear baggage compartment to be within the acceptable CG with maximum or minimum fuel respectively. Is this typical for an 8A? With a fixed pitch propeller and lightweight battery I was expecting to be not quite so nose heavy. Have others had similar results?
Thanks in advance for your help.
Craig Gallenbach
RV8A, N184CG ........ almost ready to fly
| Quote: | | http://www.matronics.com/Navigator?RV-List |
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[quote][b]
| | - The Matronics RV-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV-List |
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gordonrsmith921(at)yahoo.
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| Posted: Fri Oct 03, 2008 6:36 am Post subject: RV8A Weight and balance |
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What is the builders experience regarding weight and balance for the RV-7A? And, therefore, what is the consensus for battery location?
Gordon Smith
[quote][b]
| | - The Matronics RV-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV-List |
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T.gummo(at)verizon.net
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| Posted: Fri Oct 03, 2008 12:59 pm Post subject: RV8A Weight and balance |
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Go to Dan Checkoway's Weight and Balance Database
http://www.rvproject.com/wab/
Lots of people have recorded their WaB there.
Tom
[quote] ---
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http://www.matronics.com/Navigator?RV-List |
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