<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Arial; font-size: 12pt; color: #000000'><P>George,</P>
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<P>We know now the solution you need a <STRONG>suppression filter integrated into the TX control system</STRONG>. If NASA did it we can do it.</P>
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<P>I really don't like the term PIO. They are blaming the pilot for the controlability problem and it is not the pilot. </P>
<P><BR>Vicente "Vince" Bortone<BR><BR>----- Original Message -----<BR>From: "Bob Richards" <bob@toprudder.com><BR>To: "General pattern discussion" <nsrca-discussion@lists.nsrca.org><BR>Sent: Monday, March 22, 2010 1:38:57 PM GMT -06:00 US/Canada Central<BR>Subject: Re: [NSRCA-discussion] curious<BR><BR></P>
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<DIV>I don't know about that, but I do know that if there is enough lag time you could get into PIO (pilot induced oscillation). </DIV>
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<DIV><A href="http://www.dfrc.nasa.gov/Gallery/Movie/STS/HTML/EM-0084-02.html" target=_blank>http://www.dfrc.nasa.gov/Gallery/Movie/STS/HTML/EM-0084-02.html</A></DIV>
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<DIV>It is interesting that the measured lag time in this instance is close to the human latency that Bill mentioned, so maybe you are right.</DIV>
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<DIV>Bob R.</DIV>
<DIV><BR><BR>--- On <B>Mon, 3/22/10, Vicente "Vince" Bortone <I><vicenterc@comcast.net></I></B> wrote:<BR></DIV>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: rgb(16,16,255) 2px solid"><BR>From: Vicente "Vince" Bortone <vicenterc@comcast.net><BR>Subject: Re: [NSRCA-discussion] curious<BR>To: "General pattern discussion" <nsrca-discussion@lists.nsrca.org><BR>Date: Monday, March 22, 2010, 1:57 PM<BR><BR>
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<DIV style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: Arial">This is very good point. There is another important factor that I am going to try to explain. Someone expert in controls can help us here. I think that is called natural frequency of the control system. If the the human natural frequency is close to the TX/RX combo that will be a huge problem since the control system won't be stable. In other worlds if the TX/RX latency is very small but the natural frequencies are close to each other it could be very bad results. Well, I think this is very difficult to measure but I think this additional factor should be of consideration. <BR><BR>Vicente "Vince" Bortone<BR><BR>----- Original Message -----<BR>From: "Bill's Email" <wemodels@cox.net><BR>To: "General pattern discussion" <nsrca-discussion@lists.nsrca.org><BR>Sent: Monday, March 22, 2010 10:07:47 AM GMT -06:00 US/Canada Central<BR>Subject: Re: [NSRCA-discussion] curious<BR><BR>I think it's amusing that a year or so ago nobody had ever even heard of <BR>latency. Now it is THE NUMBER ONE technical specification to consider.<BR><BR>Keep in mind that radio latency is one to two orders of magnitude less <BR>than the "human" latency (reaction time) that we must all deal with. <BR>That runs about 215 milliseconds on average.<BR><BR>Test yours: http://www.humanbenchmark.com/tests/reactiontime/index.php<BR><BR><BR><BR><BR>_______________________________________________<BR>NSRCA-discussion mailing list<BR>NSRCA-discussion@lists.nsrca.org<BR>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion<BR></DIV></DIV><BR>-----Inline Attachment Follows-----<BR><BR>
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