hosam

My Feedback: (121)

Folks, I need help on balancing my plane. I bought a little Midget Mustang at the swap meet 2 weeks ago for $15. Cool looking plane about 40 inch W/S with no information on the plane from the seller. Now that I have it almost complete, I need to balance it but have no clue where to start, as the CG is unknown. I did hear about a method where you take the wing and measure it to come up with a location of the CG but have no clue what its called or how to get information on it. So, I am turning to the RCU gurus for some help on how to balance a plane where the CG is unknown.

Thanks in advance…

Hosam

RCPtero

Hosam,

Check out this page. Plug in the right measurements, and it'll tell you what you need to know.

[link=http://www.scaleaero.com/CG_Calculator.htm]CG Calculator[/link]

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Tom

Bad_Daddy

http://www.geistware.com/rcmodeling/cg_super_calc.htm
http://adamone.rchomepage.com/cg_calc.htm
http://adamone.rchomepage.com/cg2_canard.htm
http://www.lcrcc.net/offset_calc.htm
http://scriptasylum.com/rc_speed/_lipo.html

KI8FR

With a plane like that. You will find that is going to be right at the thickest point on the wing

dhal22

according to my aeronautical engineer uncle a 1/4 chord is a good starting point.

david

Ed Smith

The above is true to some extent. However, on a tapered or swept wing which chord is used? On any wing the chord line along which the CG is positioned is called the "Mean Aerodynamic Chord'. Use the attached diagram to determine the MAC.

Ed S

propbuster

My Feedback: (1)

25 to 30% of the MAC is where I start. Just use one of the CG calcs mentioned and you'll be fine