[simpits-tech] May the Force Feedback be with you...

[Akin, Keenan L]

Maybe I shouldn't say "3-way".  It is more of a shuttle valve that is normally closed.  Positive polarity ports one direction, negative the other.

-----Original Message-----
From: Craig Rochester [mailto:johncraigroch@msn.com]
Sent: Tuesday, February 04, 2003 1:16 PM
To: simpits-tech@simpits.org
Subject: RE: [simpits-tech] May the Force Feedback be with you...


I don't understand how this works.

A 3-way solenoid has 2 states: energized and not.  There are three ports
"A", "B", and "C"= common.  In first state "A" to "C" is open and "B" is
closed.  In the second state "B" to "C" is open and "A" is closed.  See
attached.

Craig R.



-----Original Message-----
From: simpits-tech-admin@simpits.org
[mailto:simpits-tech-admin@simpits.org]On Behalf Of Akin, Keenan L
Sent: Tuesday, February 04, 2003 1:17 PM
To: SIMPITS
Subject: [simpits-tech] May the Force Feedback be with you...


Okay folks,

Here is my current concept of a pneumatic force feedback actuator for my
pit.  There would be two of these actuators attached to the stick (one pitch
axis, one roll axis).

 <<ffactuator.gif>>
The servo driven valve uses airspeed data to modulate the airflow from one
side of the cylinder to the other (caused by moving the stick).  For
example, at higher airspeeds, the flow will be restricted, causing the stick
to be harder to move.

The solenoid valve ports pressurized air to one side of the cylinder or to
the other only when a force feedback signal directs it.  Otherwise, it is
closed.

Thoughts?  Questions?

Keenan