<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><BR><DIV><DIV>On Mar 9, 2006, at 10:28 AM, Bill Markovitz wrote:</DIV><BR class="Apple-interchange-newline"><BLOCKQUOTE type="cite"><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Arial" size="3" style="font: 12.0px Arial">Hi all..........I purchased a Quest and a Futaba 9CAF</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Arial" size="3" style="font: 12.0px Arial">at the WRAM show.<SPAN class="Apple-converted-space"> </SPAN>The 9CAF comes with 3151 digital</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Arial" size="3" style="font: 12.0px Arial">servos rated at 4.3 oz/in.<SPAN class="Apple-converted-space"> </SPAN>I would like to use these</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Arial" size="3" style="font: 12.0px Arial">servos with the 90 size Quest for competing in the</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Arial" size="3" style="font: 12.0px Arial">Intermediate class and won't be using it for 3D</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Arial" size="3" style="font: 12.0px Arial">flying.<SPAN class="Apple-converted-space"> </SPAN>Are these servos adequate for this</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Arial" size="3" style="font: 12.0px Arial">application?<SPAN class="Apple-converted-space"> </SPAN>If not, would going to 6 volts give me</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Arial" size="3" style="font: 12.0px Arial">the additonal torque that I need?<SPAN class="Apple-converted-space"> </SPAN>How much more</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Arial" size="3" style="font: 12.0px Arial">torque would going to 6 volts give me?<SPAN class="Apple-converted-space"> </SPAN>Are there any</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Arial" size="3" style="font: 12.0px Arial">known problems using an on-board 6 volt power supply?<SPAN class="Apple-converted-space"> </SPAN></FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Arial" size="3" style="font: 12.0px Arial">The 9CAF manual states that driving the servos with a</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Arial" size="3" style="font: 12.0px Arial">6 volt supply is an option.</FONT></P> </BLOCKQUOTE><BR></DIV><DIV>You will get a lot of responses to this, which will cover the gamut. </DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>First, I believe you meant 43 in-oz torque. </DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Second, for all but extreme aerobatics (like snap rolls) 43 in-oz servos should be adequate. There will probably be responses that will say that you need 80 - 100 in-oz torque servos.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Third, you may not be aware, but 30 years ago many of us were using Kraft KPS-12 servos (smallest and lightest!) in .60 cu-in engine powered airplanes weighing up to 8 pounds. The KPS-12 servo had a torque of 18 in-oz. Think about that for a while.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Ron Van Putte</DIV><BR></BODY></HTML>