formula for centre of gravity

[Paul Williams]

Hi can anybody help please, some time ago I downloaded a small program which when you entered your planes measurements worked out the c of g point for you. I cant find it does anybody know where it is ?

thanks

[Mark Kettle 1]

Here's a link Paul.

**LINK**

Aircraft Centre of Gravity Calculator

[Paul Williams]

wow that was quick thank you top class service !!

[graeme jones]

Paul - I've always used a method from the Aeromodeller Plans Handbook in the dim and distant -

(wing chord / 7), + ((3 X tailplane area X moment arm) / (8 X wing area))

if wing and tail are tapered, chord is at half span, moment arm is from 1/4 chord of wing to 1/4 chord of tail.

This gives a safe CG from the LE of the wing, at the mid point if tapered.

In practice it puts the CG at around 30 to 35% of the wing chord.

Graeme

[bouncebounce crunch]

NASA website (yes the space agency) have really good information regarding CG and finding of.

Type in a search and you will be very surprised at the aeronautical information including models.

the onboard all direction 360 view camera equipment is very interesting too.

[Don Fry]

BBC, back it the 60s, there was always a tale about, that NASA was a bunch of aero modellers, who needed access to big computers, and putting someone on the moon was the necessary byproduct.

[bouncebounce crunch]

Look at those computers now Donald, I Reckon many men that designed or flew any airborne machine (does a balloon count?) must have been an aeromodeller as a boy.

Leonardi da vinci, Imagine him getting an hour of life to see where flight is now and the changes since his ideas were sketched.