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Building Tips and technical articles. => ARF'S => Topic started by: Mike Greb on April 27, 2007, 10:55:24 PM

Title: ARF Cardinal CG
Post by: Mike Greb on April 27, 2007, 10:55:24 PM

Where is a good place for the ARF cardinal CG?  The instruction manual gives it as three inches back on the Leading edge   Tip or Root?  Looks like it is going to take a lot of lead to get it to balance.

Title: Re: ARF Cardinal CG
Post by: Jim Oliver on April 28, 2007, 07:05:29 AM

Hi Mike,

I like 4 inches from leading edge, at the fuse.  I built a small weight box at the rearmost point of the fuse cut-out,
used 1/32 ply for the outboard wall and black Ultra-coat to cover the hole.

Jim

Title: Re: ARF Cardinal CG
Post by: Mike Greb on April 28, 2007, 03:00:03 PM

Got about 3 ounces of .25" lead wire wrapped around my tailwheel right now.  It seems about right. I could loose a lot of that weight by using a tongue muffler and plastic spinner, but I like how well and quiet the motor runs with the stock muffler, and  I like the metal spinner for use with an electric starter.  I gave the motor and plane a extra special break-in and first flight.    Cranked up the LA 40 for the first time and flew a pattern on the first flight for the Airplane and motor.  It was big and sloppy as the tail weight was not on it yet.