bradp

DIY G5 HSI installation

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3 hours ago, bradp said:

Hi Kyle the century follows the heading mode with a G5 and GAD29b  in one of two ways-

a). Century radio coupler in hdg mode and the G5 with GPSs (roll steering) unselected.  In this case you will follow the G5 (HSI) heading bug. 

b ).  Century radio coupler in hdg mode and the G5 with GPSS selected.  In this case the computer in the G5 ignores your heading select bug.  It uses the computer to pretend to be a heading bug sending signals about your GPS selected bearing to / course to and cross track error.  It computes a solution that mimics the heading signals that your century autopilot listens to but the G5 is pretty smart- it can turn your plane in  holds and anticipate turn radius to fly more maneuvers more precisely.  

 

Check out the pilots guide and AFMS- they’re both good sources for information. 

Thanks Brad!

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Is there a particular reason I see everyone is installing the GMU 11 in the RH wing? If you plan to install a GFC 500 at a later date, I think the roll servo is getting installed in that wing (RH). Is it install far enough away to not create interference? Just curious.Would it matter if you installed it in the LH wing other than you are going to have the CAN BUS wire strung all over the place. 

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see the video i posted early (page 2 of this thread)

I put a whiskey compass and recorded what happens when servos are activated. Not a good location for me. Of course it will depend of what you have in the tail cone. I have an S-tec pitch servo and a trim servo there.   

Easiest location is the tail but too much interference there so put the GMU in the RW since the A/P servo was in the RW

Edited by OR75

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see the video i posted early (page 2 of this thread)
I put a whiskey compass and recorded what happens when servos are activated. Not a good location for me. Of course it will depend of what you have in the tail cone. I have an S-tec pitch servo and a trim servo there.   
Easiest location is the tail but too much interference there so put the GMU in the RW since the A/P servo was in the RW

Mine is on a shelf high up and several feet from the servos.
9dc1ede136b8ae7dc35b3f73afda034e.jpg
No issues with AP active.


Tom
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Art- which autopilot do you have?  I'd rather not mount mine in the right wing.  I like your solution.

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23 minutes ago, Andy95W said:

Art- which autopilot do you have?  I'd rather not mount mine in the right wing.  I like your solution.

It is a lot easier to run the wires to the wing than the tail. If you are already running wires to the tail, then you already have all the interior out and it doesn’t matter much. I just mounted mine on the lower wing skin. It works perfect. If you put it in the tail you will have to make a bracket.

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3 hours ago, N201MKTurbo said:

It is a lot easier to run the wires to the wing than the tail. If you are already running wires to the tail, then you already have all the interior out and it doesn’t matter much. I just mounted mine on the lower wing skin. It works perfect. If you put it in the tail you will have to make a bracket.

Actually running wires in the leading edge of the wing is not that easy. You have to fish or pull the wire with safety wire - did not find a easier solution. Also need to put grommets in the holes that the wire goes through 

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39 minutes ago, OR75 said:

Actually running wires in the leading edge of the wing is not that easy. You have to fish or pull the wire with safety wire - did not find a easier solution. Also need to put grommets in the holes that the wire goes through 

I just followed the wing light wires and ty-wrapped them together.

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12 hours ago, OR75 said:

Actually running wires in the leading edge of the wing is not that easy. You have to fish or pull the wire with safety wire - did not find a easier solution. Also need to put grommets in the holes that the wire goes through 

I didn't find it that bad for the OAT probe I put in for the JPI. Biggest help was having one of those cheap inspection/borescope cameras to play find the safety wire when I missed the hole so I could aim better. Also remembering that if I couldn't get one way to work I could use a new piece of safety wire from the other direction to hook onto the one ferrying the actual wire. Admittedly it would have been nice to have an inspection plate between every set of ribs and then it would have taken about 5 minutes.

Then again I've had plenty of practice doing this in my attic which is too short for a human so all my electrical and network conduit runs are done by fishing from the attic opening, often involving magnets.

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On 6/18/2019 at 7:45 PM, N201MKTurbo said:

I just mounted mine on the lower wing skin.

Can you explain further how you mounted it to the lower wing skin? No bracket like BradP's creation?

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1 minute ago, tigers2007 said:

Can you explain further how you mounted it to the lower wing skin? No bracket like BradP's creation?

Drilled 4 holes and put the 4 screws that came with it through the holes.

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I'm guessing you leveled the aircraft, found your sweet spot, marked the holes, and drilled away? It was that simple? What started off sounding like rocket science was simplified into something quite doable by my standards...

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23 minutes ago, tigers2007 said:

I'm guessing you leveled the aircraft, found your sweet spot, marked the holes, and drilled away? It was that simple? What started off sounding like rocket science was simplified into something quite doable by my standards...

That is correct.

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I am not working on a mooney now, but given all of the panel work you guys might be able to help me?

I am redoing a panel (left side only) for a Cessna 150-F, and need a template for a DG that has a heading bug.  Seems they put a screwhole just to the top-left of the lower left Knob, and I want to give the CNC guy something to work with.

Please let me know if anyone has a template or CNC measurements?

Great looking works on panels here.  I like the one on page 4 that is a pale tan color?!  That might be a powder-coat I go with for the old Cessna.
 

Thanx for sharing!

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Welcome aboard Zeddock!

What DG do you have?

Got a pic?

make it quick...

Get in and out as fast as you can...

Looking at Mooneys can start an addiction for speed... that could last a lifetime!

:)

Best regards,

-a-

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