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#1
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happy-box for roll steering?
In CNX80 User Newsletter number 1 at
http://www.garmin.com/manuals/GNS480...st_Edition.pdf on page 5, the author refers to "... a 'happy-box' that accepts the roll steering output commands from the CNX80 and turns them into voltage outputs that mimic the inputs from the HSI/DG heading bug." I haven't found any other information about such a device. Anyone? Thanks. Dave |
#2
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S-Tec GPSS box maybe?
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#3
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"Jim Burns" wrote in message ... S-Tec GPSS box maybe? No, he is talking about a box that takes in digital roll steering information and outputs heading commands to the AP. Mike MU-2 |
#4
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Jim Burns wrote:
S-Tec GPSS box maybe? You mean an S-Tec autopilot? Yes, they accept roll steering commands, but I didn't give you quite enough context. The article was describing a device that converts the roll steering commands into analog signals that can be interpreted by a "legacy" autopilot. The alleged device provides inputs to your non-gpss autopilot such that the autopilot sees the same signals as if you were turning the heading bug. It allows a source of roll-steering commands (like your GPS) to drive an autopilot that only responds to the course-deviation-indicator and heading bug kinds of signals. ....or maybe you know about and S-Tec product that does that, in which case Hooray! and thanks. Dave |
#5
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http://www.s-tec.com/newsletters/app...9/fly1099.html
Mentions a HDG/GPSS switch to send GPSS analog signals to the autopilot rather than the HDG bug signals. Note that this is a 1999 article. The two most common forms for the steering outputs to the autopilot are an analog AC signal, or a Digital output in the popular ARINC 429 data bus format. If the output is analog and can be matched to the heading error signal, it is often only necessary to intercept the Hdg Bug input to the autopilot with a switch that allows exchanging HDG with the Steering signal. The autopilot then flies the Steering Command as it would HDG error. The more popular steering signal is the 429 format. The navigators that output the 429 signal are all digital, meaning the data elements are already available in digital format. In our case, we take the 429 signal and convert it to the equivalent of a HDG signal. However, we provide it with more turn rate capability than we do the HDG channel. This is to assure that the autopilot will be able to maneuver adequately when conducting one of the standardized GPS approaches that have 90 degree turns from the initial approach segment to the intermediate segment. This is particularly important at approach speeds. For the pilot, life is simple. Select the desired way point on the navigator, and select GPSS mode on the autopilot or on the HDG/GPSS selector switch, and watch modern science in action. http://www.dacint.com/ecd/ecdproducts.htm A quick google for digital analog output roll steering heading produced this result, a company that makes converters. And also mentions a switch to feed GPSS commands into your autopilot instead of HDG commands. Jim |
#6
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Jim Burns wrote:
http://www.s-tec.com/newsletters/app...9/fly1099.html Mentions a HDG/GPSS switch to send GPSS analog signals to the autopilot rather than the HDG bug signals. Note that this is a 1999 article. and watch modern science in action. snip http://www.dacint.com/ecd/ecdproducts.htm A quick google for digital analog output roll steering heading produced this result, a company that makes converters. And also mentions a switch to feed GPSS commands into your autopilot instead of HDG commands. Excellent, Jim, that's what I was looking for. Thank you. Now, does anyone have any experience with any of these boxen? Recommendations? Reviews? Thanks, Dave |
#7
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I'm a little unclear if this does the roll steering, but Garmin has a
converter box for various input/output conversions: http://www.garmin.com/products/gad42/spec.html -Jon C. "Dave Butler" wrote in message news:1119024707.337600@sj-nntpcache-3... In CNX80 User Newsletter number 1 at http://www.garmin.com/manuals/GNS480...st_Edition.pdf on page 5, the author refers to "... a 'happy-box' that accepts the roll steering output commands from the CNX80 and turns them into voltage outputs that mimic the inputs from the HSI/DG heading bug." I haven't found any other information about such a device. Anyone? Thanks. Dave |
#8
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The Garmine GAD42 converts the 429 digital roll steering to an analog roll
steering command. Mike MU-2 "Jon Carlson" wrote in message ... I'm a little unclear if this does the roll steering, but Garmin has a converter box for various input/output conversions: http://www.garmin.com/products/gad42/spec.html -Jon C. "Dave Butler" wrote in message news:1119024707.337600@sj-nntpcache-3... In CNX80 User Newsletter number 1 at http://www.garmin.com/manuals/GNS480...st_Edition.pdf on page 5, the author refers to "... a 'happy-box' that accepts the roll steering output commands from the CNX80 and turns them into voltage outputs that mimic the inputs from the HSI/DG heading bug." I haven't found any other information about such a device. Anyone? Thanks. Dave |
#9
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I've got a DAC unit half-installed in my Saratoga. I say
half-installed, because we got all the way through putting the install kit in, only to find that the approved model list for the STC that they'd supplied to me was not yet approved. Someone in in sales/support sent it out with authorithy, and so now I'm waiting for mhy airframe to be officially on the AML before I can finish the install. Also, it looks like the DAC unit has some problems with the KLN-94 GPS, as a result of the King unit's over-damped track outputs. Assuming the AML is fixed soon, I'm going to try it anyway, as I also have a KLN-90B in the plane that I can run it from in case the KLN-94's oscillations are too much. I'll report back... |
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