Modding a Model Slo V

[hbaird]

I just got and put together a new Slo V. I also am flying the Slo V on FMS. The FMS model looks like the wing is max forward. How can I mod the .par file and move it back in small increments so I can learn more before I fly for real? I would like to start off with more stability.
More data: I changed the Pitch Inertia Moment Iyy from 0.2 to 0.1 believing this is moving the CG forward. This did what I expect moving the wing aft will do. The pitch axis is more stable now. How can I get my plane to fly this way?

[ggunners]

A farther back CG will make your airplane more sensitive to turns and stalls but make it more lively in the roll axis. A more forward CG will make the model more stable in the roll axis and cause the airplane to feel a bit heavy on the elevator.

What you did in FMS did not adjust the CG. The CG is adjusted in the MAIN section of the FMS .par file. There are 3 parameters for CG, X, Y and Z.

* * * SORRY, THESE ARE THE METASEQUOIA AXIS, SEE FMS PAR BELOW * * *

+X = move CG right, -X = move CG left
+Y = move CG down, -Y = move CG up
+Z = move CG forward, -Z = move CG back

In your case, play with small increments of CG Z+ fore and Z- aft. Something like 0.01 +/- or perhaps less.

-- ggunners

[hbaird]

Z just pushed the model down into the runway.

[ggunners]

Yep, sorry, the Metasequoia and FMS axis are a bit different.
Here's the FMS .par version.

0 m Center of gravity X (+=Forward)(-=Backward)
0 m Center of gravity Y (+=Right)(-=Left)
0 m Center of gravity Z (+=Below)(-=Above)

-- ggunners

[hbaird]

Thanks I will try the X axis.

[hbaird]

Thanks again for the help. The Slo V pitched up with the power low to off. Moving X 0.04 flattened out the pitch responce and I hope made it fly like I moved the wing back about that amount. I have one ready to fly but winds are too high for me and will stay that way for the next ten days.

[ggunners]

You can also adjust the down angle on the MOTOR but you will need to use Mr. Masuoka's .par editor to make that happen unless you're real good with trig.

-- ggunners