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grosseair(at)comcast.net
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 Posted: Sun Nov 25, 2007 3:27 pm Post subject: Autopliot & GPS Dilemma |
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Seem like a lot of work to save $25, but if you want to tie something
else in, I'd think the TruTrack people would be the ones you'd want to
talk to.
John Grosse
FlyboyTR wrote:
| Quote: |
I am wanting to add an autopilot to my plane. All the current units for experimental aircraft require a GPS to drive the system (so it knows where it's at). I use the AnywhereMap system with a Fujitsu tablet which has no output (NMEA). I read on the TruTrack web page that for non-GPS equipped aircraft they can supply a Garmin 35-HVA GPS receiver to drive the system. The 35-HVA works on 6-40 volts and has three wire leads (to be hardwired)...a positive, negative and the data line. TruTrack gets $175.00 for this receiver. I am looking for a less expensive alternative.
I can purchase any number of GPS receivers for less than $50...and actually already run two Bluetooth units in the plane (running two AnywhereMap systems). Does anyone have any suggestions on how one would tie in a generic GPS receiver? Thanks!
--------
Travis Rayner
Mobile, AL
Skystar Vixen
N-789DF
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ceengland(at)bellsouth.ne
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| Posted: Sun Nov 25, 2007 5:33 pm Post subject: Autopliot & GPS Dilemma |
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FlyboyTR wrote:
| Quote: |
<flyboytr(at)bellsouth.net>
I am wanting to add an autopilot to my plane. All the current units
for experimental aircraft require a GPS to drive the system (so it
knows where it's at). I use the AnywhereMap system with a Fujitsu
tablet which has no output (NMEA). I read on the TruTrack web page
that for non-GPS equipped aircraft they can supply a Garmin 35-HVA
GPS receiver to drive the system. The 35-HVA works on 6-40 volts and
has three wire leads (to be hardwired)...a positive, negative and the
data line. TruTrack gets $175.00 for this receiver. I am looking
for a less expensive alternative.
I can purchase any number of GPS receivers for less than $50...and
actually already run two Bluetooth units in the plane (running two
AnywhereMap systems). Does anyone have any suggestions on how one
would tie in a generic GPS receiver? Thanks!
-------- Travis Rayner Mobile, AL Skystar Vixen N-789DF
Is that supposed to be 35-HVS?
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The TruTrak install manuals seem to indicate that they just need RS-232
level serial data at 4800 or 9600 baud, depending on TruTrak model.
Garmin's site https://buy.garmin.com/shop/shop.do?pID=62 says the 35's
are discontinued, but I'll bet that whatever is the current model Garmin
with those specs will work fine.
I'll also bet that if you call TruTrak, they will tell you what will
work if you want to buy your own from another source. They are expecting
you to hook up your existing GPS, anyway. You might want to ask if it
will accept USB level signals. If it will, there are many, many possible
self-contained GPS hockey-pucks that would work.
Charlie
Charlie
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ainut(at)hiwaay.net
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| Posted: Sun Nov 25, 2007 5:41 pm Post subject: Autopliot & GPS Dilemma |
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just get one with a serial port. most of those gps's have nmea output.
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FlyboyTR
Joined: 04 Nov 2006
Posts: 215
Location: Mobile, Alabama
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| Posted: Mon Feb 25, 2008 6:46 am Post subject: Re: Autopliot & GPS Dilemma |
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This is what I ended up with. TruTrak installed an internal GPS (has external antenna) so the unit always knows what direction it's going. Everything works great with the exception that I cant drive it from my GPS navigation system...with heading/waypoint info. It's really not a problem. My nav system tells me what heading I should be on to the next waypoint and I turn the dial on the autopilot to that heading. Only requires an occasional 1 or 2 degree adjustment for wind drift. So far I've been very happy with this system. The altitude hold doesn't vary by 10' even in rough air.
Thanks for all the input.
Travis 
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_________________
Travis Rayner
Mobile, AL
Skystar Vixen, N-789DF
Continental IO-240, Prince P-Tip Prop
ADI-II Autopilot
AnyWhereMap Navigation with weather
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