[simpits-tech] Motion...

[Craig Rochester]

Jay,

I can do that now with Falcon4.  Falcon has a shared file with all the data
necessary to use for motion.
See Erwin Neyt's site: http://www.eagle9.nl
Falcon4 data -->
http://www.eagle9.nl/main/Programming/F4%20Data%20Extraction/ProgShMemF4.asp
?

Sending just the pitch, roll, and yaw data directly to a motion platform
does not produce the correct motion cues for real flight.  Eg. you roll left
and pull back on the stick to bank.  A real pilot experiences the
centrifugal force(G-force) as well as the momentary inertial and gravity
forces.  The motion platform cannot do G-forces, so all you feel from the
platform is the banking force and without the G-force, you feel like your
falling over off the seat.  For the real pilot, the gravity force is
balanced by a component of the centrifugal force so there is no net lateral
force.

The banking "feel" can be simulated by banking the platform and then slowly
returning if to the level position; this is called "washout".

Craig R.

-----Original Message-----
From: simpits-tech-admin@simpits.org
[mailto:simpits-tech-admin@simpits.org]On Behalf Of Joseph Fagner
Sent: Friday, January 17, 2003 10:55 PM
To: simpits-tech@simpits.org
Subject: RE: [simpits-tech] Motion...


Think about this for a minute (granted I realize this is probably overly
simplistic and the math is infinitely more complex):  Most software out
there has the 4 axis of data (not to be confused with the axis of evil)
one might need for motion.  Couldn't one just write some software to
read this data and translate that to motion?  The data to which I refer
is (1) pitch and (2) roll  (X and Y axis); via your artificial horizon
instrument.  (3) Yaw (Z axis), via your compass and (4) altitude via the
altimeter.

Jay

-----Original Message-----
From: simpits-tech-admin@simpits.org
[mailto:simpits-tech-admin@simpits.org] On Behalf Of Roy Coates
Sent: Friday, January 17, 2003 6:57 PM
To: simpits-tech@simpits.org
Subject: Re: [simpits-tech] Motion...

On Fri, 17 Jan 2003, Brian West. wrote:

>         I have an excellent book published a few years back. The title
is "
> Flight Simulation" by J.M.Rolfe and K.J. Staples, published by
Cambridge
> University Press, ISBN 0-521-35751-9
> It contains all the mathematical models etc needed plus a lot more.
It's
> almost certainly out of print but a search of secondhand book dealers
might
> turn up a copy.
> If you can't find a copy come back to me . It's all a bit daunting
though,
> time and costwise for an individual.

Thanks Brian - appreciate that. From what little research I've done so
far
it has become quite clear the there is no fixed rule to motion
simulation,
there seem to be several schools of thought on the topic.

It also seems clear that each method has its own weaknesses. I'll
continue
searching!

Roy.


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