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Old 12-06-2020, 06:17 PM
plbarrett2004's Avatar
plbarrett2004 plbarrett2004 is offline
Join Date: Jul 2012
Location: Westminster, MD
Posts: 69
Default RV-8 Weight and Balance Database

Hello All,

Years ago Dan Checkoway compiled a database of weight and balance numbers for RVs. That database survives today that someone collected on a google drive sheet available here.

A great resource, however you'll notice that the majority of RV-8s listed have an empty CG of 77.51", to include all of the 200hp variants. Clearly not all of those aircraft are coming in with that exact number, so somewhere along the line I suspect that an error was introduced.

My build has an IO-360 A3B6D with a Whirlwind 74HRT prop and the battery is going in the back. I'm trying to run some weight and balance scenarios. I am hoping to get some other examples for RV-8s with a similar configuration.

Searching the forums so far, I have found:

Angle Valve with metal CS prop (N181U) 79.4 1162lbs
Ian Findlay (200hp metal CS prop) 77.7 1111lbs
Michael Robinson (200hp with metal cs) 78.4 1162lbs

So a few questions - anyone willing to report their numbers? Also - does anyone know who owns that spreadsheet in google drive?

Peter L. Barrett
RV-8 - Firewall Forward in Progress
Dues exempt
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Old 12-06-2020, 06:33 PM
agirard7a's Avatar
agirard7a agirard7a is offline
Join Date: Aug 2009
Location: Newport, RI
Posts: 722
Default Rv-8 numbers.

1125 lbs
76.86 cg.
200 hp angle valve
Metal CS
Al Girard, Newport, RI
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Old 12-06-2020, 07:20 PM
sapeloson's Avatar
sapeloson sapeloson is offline
Join Date: Nov 2009
Location: Jesup, GA
Posts: 187
Default N84TH

79.42 CG
Stock IO-360
MT 3-Blade CS
Full Inverted Oil & Fuel
Rear Battery
Phase 1 Flight Testing
Garmin IFR by Stein
Lycoming IO-360 (180HP)
MT 3 Blade CS
N84TH / Registered and GA sales tax paid! $@&!;:?)(!
N3159F C-182 @ KJES
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Old 12-06-2020, 10:22 PM
drill_and_buck's Avatar
drill_and_buck drill_and_buck is offline
Join Date: Feb 2005
Location: Bridgewater, MA - KPYM
Posts: 465

1155 lbs.
Hartzell HC-C2YR-1BPF/F7497, 74 inch diameter
Rear Battery (PC680)
CG 79.42
Mike Draper
RV-8 N468RV
First Flight 11/13/2011
TMX0360, Pmags, CS
Bridgewater, MA
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Old 12-07-2020, 06:10 AM
wilddog wilddog is offline
Join Date: Feb 2008
Location: va.
Posts: 621

RV-8, N88WV, 1032#, 79.05”, Titan IO370, Whirlwind GA prop, battery on FW, 380-180-5 tires, light weight tailwheel

Last edited by wilddog : 04-27-2021 at 04:37 PM.
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Old 12-07-2020, 08:02 AM
brad walton brad walton is offline
Join Date: Jul 2007
Location: Cypress, TX
Posts: 529

RV8, N47BW, 1070#, 79.52 cg, Superior IO360, Catto 3 blade
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Old 12-07-2020, 10:55 AM
Champ's Avatar
Champ Champ is offline
Join Date: Apr 2012
Location: Kingsville, Ontario, Canada
Posts: 323

RV-8, 1153#, 78.24 cg, AeroSport IO375, 72" Hartzell BA, Battery Aft, Primed In & Out, Painted, Steam gauges
Dennis Enns
Bellanca Champ 7ACA since 1986, restored 1990.
RV-8 IO375, Hartzell CS, dual PMags, OW Award Oshkosh 2017
2021 Donation In
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Old 12-07-2020, 11:04 AM
KGT KGT is offline
Join Date: Feb 2018
Location: Rosemount MN
Posts: 20

IO360 200HP Angle Valve
EarthX Battery on firewall
Hartzell Composite Prop
1,106 LB
CG 75.6 IN
RV-8 Flying since 2012
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Old 12-07-2020, 11:33 AM
Carl Froehlich's Avatar
Carl Froehlich Carl Froehlich is offline
Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
Posts: 2,947

Hartzell BA CS prop
One PC-625 battery in the fwd baggage well, one PC-625 battery in the standard aft location
Grove Gear
Painted (base coat - clear coat), everything primed and interior painted
1137# empty, CG 78.83" empty


Last edited by Carl Froehlich : 12-07-2020 at 11:39 AM.
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Old 04-15-2021, 08:14 PM
dodgeram2500 dodgeram2500 is offline
Join Date: Oct 2018
Location: Ontario, Canada
Posts: 11
Default Bump

This thread is an excellent resource. I am a new builder that has just ordered an empennage kit. I won't hijack the thread with my questions but I hope more people post their setups/weight and balance info... especially moment arms, battery location and any weight saving mods, engine/prop type etc. It certainly helps for build planning purposes!
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