Re: [Jsbsim-devel] Body velocity property

[Jon S. B. <js...@ha...>]

> Are
>
> velocities/p-aero-rad_sec
> velocities/q-aero-rad_sec
> velocities/w-aero-rad_sec
>
> World velocities of the aircraft ?
>
> Oleksiy.

These are the body axis *rotational* velocities ("rates" is more
appropriate).

You can get the *velocities* in the local coordinate frame from:

    /fdm/jsbsim/velocities/v-north-fps
    /fdm/jsbsim/velocities/v-east-fps
    /fdm/jsbsim/velocities/v-down-fps

The above velocities are what you would see if you were standing underneath
the airplane and were able to measure the airspeed from that point. The
units are feet/sec. These are the north, east and down components of
velocity.

The following are the body axis velocities - how fast the aircraft is moving
relative to the ground in the aircraft x, y, and z axes:

    /fdm/jsbsim/velocities/u-fps
    /fdm/jsbsim/velocities/v-fps
    /fdm/jsbsim/velocities/w-fps

Does this help?

Jon