[simpits-tech] May the Force Feedback be with you...
Ken Schlote
simpits-tech@simpits.org
Sat, 8 Feb 2003 19:50:38 -0800 (PST)
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More comments,
Matt Bailey <mattb@rtccom.net> wrote:
You could just make the compressor component of the cylinder (the part
connected to the stick...sorry, I don't know the correct name for this
device, plunger?) smaller to decrease the rate at which pressure builds. You
DO want pressure to build fairly rapidly. Getting the distances, travel, etc
right would require experimentation. I picked this method because by its
nature it seems to fundamentally match what happens in the real world. A very
slightly sloppy center position, with naturally increasing pressure as the
control is moved further from center.
Yes I agree. The pressure should build the further away from center you are. But I don't know how much. The only thing I've flown is a Cessna 150 & 172. Not much pressure their.
I don't quite follow this part. By cylinder, are you referring to what I was
trying to say earlier by "plunger"? The part that goes inside the chamber.
You said what I meant in the previous paragragh.
> This system will also
> need two cylinders per axis.
Yep.
This can get costly.
> My idea may work, use an innertube around a
> circular disk (attached to the stick) inside a retaining ring. The pressure
> would be controlled the same way but when you move the stick the disk would
> press on the innertube and you would feel the pressure. The air would
> simply move to the otherside of the tube and the pressure would remain the
> same. The stick would self center because the tube would go back the the
> orginal shape. This would be the same pressure in all directions.Trim would
> be just moving the tube assembly to a different center. Any thoughts or
> comments?
Interesting. I don't really think just moving air around is sufficient, you
want some compression going on. But, you'd be compressing the air by reducing
the space inside the tube. The logistics of the system would be much simpler
than my idea.
-Matt Bailey
Like you said Matt, the air just doesn't move around because you have deformed the tube. The opposite side will need to increase in size which also increases the pressure as it expands. The amount of pressure to start with will need to be determined. Or you may find that you don't want the tube to expand much at all, just let the pressure increase .
Ken
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<P>More comments,
<P> <B><I>Matt Bailey <mattb@rtccom.net></I></B> wrote:
<BLOCKQUOTE style="BORDER-LEFT: #1010ff 2px solid; MARGIN-LEFT: 5px; PADDING-LEFT: 5px">
<P>You could just make the compressor component of the cylinder (the part <BR>connected to the stick...sorry, I don't know the correct name for this <BR>device, plunger?) smaller to decrease the rate at which pressure builds. You <BR>DO want pressure to build fairly rapidly. Getting the distances, travel, etc <BR>right would require experimentation. I picked this method because by its <BR>nature it seems to fundamentally match what happens in the real world. A very <BR>slightly sloppy center position, with naturally increasing pressure as the <BR>control is moved further from center.</P>
<P>Yes I agree. The pressure should build the further away from center you are. But I don't know how much. The only thing I've flown is a Cessna 150 & 172. Not much pressure their.</P>
<P><BR>I don't quite follow this part. By cylinder, are you referring to what I was <BR>trying to say earlier by "plunger"? The part that goes inside the chamber.</P>
<P> </P>
<P>You said what I meant in the previous paragragh.</P>
<P><BR><BR>> This system will also<BR>> need two cylinders per axis.<BR><BR>Yep.<BR></P>
<P>This can get costly.</P>
<P> </P>
<P><BR>> My idea may work, use an innertube around a<BR>> circular disk (attached to the stick) inside a retaining ring. The pressure<BR>> would be controlled the same way but when you move the stick the disk would<BR>> press on the innertube and you would feel the pressure. The air would<BR>> simply move to the otherside of the tube and the pressure would remain the<BR>> same. The stick would self center because the tube would go back the the<BR>> orginal shape. This would be the same pressure in all directions.Trim would<BR>> be just moving the tube assembly to a different center. Any thoughts or<BR>> comments?<BR><BR>Interesting. I don't really think just moving air around is sufficient, you <BR>want some compression going on. But, you'd be compressing the air by reducing <BR>the space inside the tube. The logistics of the system would be much simpler <BR>than my idea.<BR><BR>-Matt Bailey</P>
<P> </P>
<P>Like you said Matt, the air just doesn't move around because you have deformed the tube. The opposite side will need to increase in size which also increases the pressure as it expands. The amount of pressure to start with will need to be determined. Or you may find that you don't want the tube to expand much at all, just let the pressure increase .</P>
<P>Ken<BR>_______________________________________________<BR>Simpits-tech mailing list<BR>Simpits-tech@simpits.org<BR>http://www.simpits.org/mailman/listinfo/simpits-tech<BR>To unsubscribe, please see the instructions at the bottom of the above page. Thanks!</P></BLOCKQUOTE><p><br><hr size=1>Do you Yahoo!?<br>
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