bug in par File with FMS85 - check it please

[Ishi San]

I made this par file and it doesn't work.
So I've cheked it but didn't found why.
Have you the solution ?

VERSION 1.0

INFO

Ader_Avion_n°3



ENDINFO


AIRPLANE

MAIN

2.8 //Mass [Kg]
0.40 //Roll Inertia Moment Ixx [kg*m^2]
0.34 //Pitch Inertia Moment Iyy [kg*m^2]
0.70 //Yaw Inertia Moment Izz [kg*m^2]
-0.00 //Ixz [kg*m^2]
-0.10 0 0 //

[ggunners]

Ishi San,

Do you have a .zip file with the .par and .x files?

You should be able to edit them with and it will show you what's different between the 3D model (.x) and the .par file.

Start by opening the .par with the ParEdit.exe program and making sure you can see the 3D model by clicking on the [3d], [Point] and [Par] boxes above the graphic area. Then click on the [Y-auto] button at the bottom of the graphic area to automatically scale the .x file and .par file to be equal along the Y-axis or wing span.

If you then click the "Wing" tab along the top of the main window and click the [1], [2] etc. buttons in sequence, a green box will highlight the wing element in the graphics window. Adjust the wing .par entries until they correspond with the model. Do the same thing for Points and Wheels and that should fix your .par file.

Give it a try or pass your .x file along and I'll look at it for you.

-- ggunners

[ggunners]

Ishi San,

One other guess, your product of inertia should probably not be zero "-0.00". Try "-0.07".

MAIN

2.8 //Mass [Kg]
0.40 //Roll Inertia Moment Ixx [kg*m^2]
0.34 //Pitch Inertia Moment Iyy [kg*m^2]
0.70 //Yaw Inertia Moment Izz [kg*m^2]
-0.00 //Ixz [kg*m^2] Product of Inertia

-- ggunners

[Ishi San]

This is not the problem gguners.

I search yet but don't find.

Ishi

[Ishi San]

Ok I identify that the line for disclaim the two motor are guilty.
But don't understand yet.
Perhaps a real bug ?

Ishi

[ggunners]

Ishi San,
This one flies. Not well though. Hand launch only.
It was the prop pitch causing the problem. At .1 it works OK, below that it doesn't work.
-- ggunners

VERSION 1.0

INFO

Ader_Avion_n°3

ENDINFO

// <ParEditor Ver0.5 2004-12-07 Masuoka Hideaki>
// ParEditor.Scale=150
// ParEditor.Data1= 2 2 1 1 3 3 3 2.1265 4.2156
// ParEditor.Data2=0.5 0.5 0.6900 0.6900 0.1034 0.0624 0.6300 0.7875 0.7875 0.8 5.5508
// ParEditor.Data3=0 0 0
// ParEditor.Data4=0 0 2 2 -1 -5
// ParEditor.Data5=2 -2 1 -1 0 0
// ParEditor.Data6=1 1 0 0 -2 1
// ParEditor.Data7=15 -5.131

AIRPLANE

MAIN

2.8 //Mass [Kg]
0.40 //Roll Inertia Moment Ixx [kg*m^2]
0.34 //Pitch Inertia Moment Iyy [kg*m^2]
0.70 //Yaw Inertia Moment Izz [kg*m^2]
-0.0 //Ixz [kg*m^2]
0 0 0 //

[ggunners]

Ishi san,

Also changed wheel positions for take-off & taxi as follows.

//WHEEL1 <LEFT>
0.18 -0.50 0.64 //ŽÔ—ֈʒu [m]
//WHEEL2 <RIGHT>
0.18 0.50 0.64 //ŽÔ—ֈʒu [m]
//WHEEL3
-0.72 0 0.50 //ŽÔ—ֈʒu [m]

Will now take off with a slight wind of 1.2 m/s but then settles to the ground a bit after take-off. Probably realistic.

-- ggunners

[Ishi San]

ok GGuners

Thanks a lot for the tip.

Ishi San (alias Pierre Gentil)