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  #1  
Old 08-26-2019, 08:11 PM
agent4573 agent4573 is offline
 
Join Date: Aug 2019
Location: Mountain view
Posts: 487
Default Weight and balance datums

Does anyone have the numbers for common datums for the major components? I know the station 0 line is 70" in front of the the forward wing root, but what about prop, engine, and firewall? I'm trying to plan a build and know it's going to be a fat pig. I wanna play around with some engine and prop combos to see the best setup but I don't know where they're located. For easy of calculations, I'm just going to assume center of physical dimensions for cg of components, so front datum or center datum will be fine. Thanks.
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  #2  
Old 08-29-2019, 11:02 AM
Raymo's Avatar
Raymo Raymo is offline
 
Join Date: Nov 2014
Location: Richmond Hill, GA (KLHW)
Posts: 2,340
Default

Use a plum-bob to mark the 70" with the aircraft level, then measure back from there to your firewall and other locations. You'll need to do this for the landing gear too.
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RV-7A - Slider - N495KL - First flt 27 Jan 17
O-360-A4M w/ AFP FM-150 FI, Dual PMags, Vetterman Trombone Exh, SkyTech starter, BandC Alt (PP failed after 226 hrs)
Catto 3 blade NLE, FlightLines Interior, James cowl, plenum & intake, Anti-Splat -14 seat mod and nose gear support
All lines by TSFlightLines (aka Hoser)
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