Accutrak II "new" install.

[0TreeLemur]

I just had a Brittain Accutrak II installed in my M20C by Jerry who has never installed one before.   I've never used one either, but I really like the PC system and have read that the Accutrak II is great.    Jerry called me today saying that he couldn't get the turn knob to deflect the ailerons.   He also said that the thing doesn't have an on/off switch, it is always on, like the PC system.  I'm going over (100 miles) away to flight test tomorrow afternoon wx allowing.

A couple of questions that I hope someone can answer:

1.  Since you cannot turn the Accutrak II off, when it is slaved to a CDI that is connected to a radio that is not tracking anything, i.e. always centered, the Accutrak II just does nothing, right?   Does it only function when the needle on the CDI is "alive"?  Is that effectively the on/off switch?  Why didn't they put an on/off switch on the unit?   Should there be one on the panel?

2.  When you rotate the manual turn knob on the ground with the engine running, should it deflect the ailerons?  If so, then my system has a problem because that doesn't happen according to Jerry.

Thanks!

Fred

[takair]

1.  You should be able to turn the Accutrak Off.  On mine, both switches to OFF.  2.  Yes, with it on, you should be able to turn the yoke with the knob.  With it Off, it should not turn the yoke and should revert to PC.

[Yetti]

There should be a manual in the download section.  Mine has an on and off switch that is part of how you connect it.  I believe the manual should be part of the POH supplement.

[takair]

Does it not have the center OFF as shown here?

[takair]

To use the knob, the Sense switch must be either Hi or Lo.

[carusoam]

I would expect you need the vacuum pump to be operating to get the servos to operate...?

My PC was never working...

Best regards,

-a-

[0TreeLemur]

12 minutes ago, takair said:

Does it not have the center OFF as shown here?

 

Thanks for the photo.  I don't remember exactly what it looked like, but I vaguely recall that there was an "off" in between the NAV1 and NAV2 positions.   Maybe it is worn off?    I'll check.   I see two "off" positions!

[0TreeLemur]

29 minutes ago, Yetti said:

There should be a manual in the download section.  Mine has an on and off switch that is part of how you connect it.  I believe the manual should be part of the POH supplement.

I looked, and don't see an Accutrak II manual in the download section of MS.   Just a PC system manual uploaded by @tonyand a Navigation Coupler manual uploaded by @Hank .   Does anyone have an Accutrack manual in pdf format?

[0TreeLemur]

20 minutes ago, carusoam said:

I would expect you need the vacuum pump to be operating to get the servos to operate...?

My PC was never working...

Best regards,

-a-

He said that he tested with the engine running...

[Hank]

@Fred_2O, please visit the Downloads section. I'm pretty sure I put a set of AccuTrak instructions and troubleshooting guide there. If not, let me know and I will. But I use the AccuFlite probably 10 times as often.

And yes, both systems should have an OFF position, even if your switches don't look like Oscar's picture. Like mine below.

[0TreeLemur]

38 minutes ago, takair said:

Does it not have the center OFF as shown here?

 

Mine does look like the photo @takair sent.

[Yetti]

I just put the B11 PoH supplement in the download section.  There is some line about being turned off when taking off or landing.  Interesting to know how your installer is working the STC

[Hector]

Mine does look like the photo [mention=7545]takair[/mention] sent.

The center position of the hi/low sensitivity switch is the off position. The pc or wing leveler must be on for Accutrack to work. On some Mooney’s the wing leveler is always on. Mine has an on/off switch on the panel for the wing leveler. If connected to a gps for nav source set the gps to .3 miles full scale deflection of the CDI at all times (default). Look at your gps documentation for how to set this as a default. Your accutrack will then follow the magenta line like it’s on rails without wondering or chasing the needles.


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[0TreeLemur]

53 minutes ago, Yetti said:

I just put the B11 PoH supplement in the download section.  There is some line about being turned off when taking off or landing.  Interesting to know how your installer is working the STC

Thanks for the upload.  Cecilia at Brittain gave me all the docs, and I passed them along to the installer.

[0TreeLemur]

46 minutes ago, Hector said:

The center position of the hi/low sensitivity switch is the off position. The pc or wing leveler must be on for Accutrack to work. On some Mooney’s the wing leveler is always on. Mine has an on/off switch on the panel for the wing leveler. If connected to a gps for nav source set the gps to .3 miles full scale deflection of the CDI at all times (default). Look at your gps documentation for how to set this as a default. Your accutrack will then follow the magenta line like it’s on rails without wondering or chasing the needles.


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Thanks for the info.  My PC system is on unless I depress or remove the vacuum release button on the yoke.

[0TreeLemur]

18 minutes ago, Fred_2O said:

Thanks for the upload.  Cecilia at Brittain gave me all the docs, and I passed them along to the installer.

Must be some delay affecting when file uploads appear to others.  I don't see the B11 PoH supplement in the downloads section yet.   I'll check again in the morning.

[0TreeLemur]

8 hours ago, Fred_2O said:

Must be some delay affecting when file uploads appear to others.  I don't see the B11 PoH supplement in the downloads section yet.   I'll check again in the morning.

@Yetti the B11 PoH supplement is still not there.   There seems to be a glitch somewhere, or I'm just missing it.   Please repost?

[Yetti]

Let's try this  

 

[0TreeLemur]

1 hour ago, Yetti said:

Let's try this  

 

Got it- thanks @Yetti.    I am pretty sure that the materials I passed on to the installer included that, but it is good to have it online too.

[Yetti]

Better to study and learn on the computer than while flying :-)

[0TreeLemur]

@Hank do you have, or know someone who might have, a B11 troubleshooting guide?   I test flew my a/c last night and the Accutrak II is INOP.  My instrument guy could use some advice.

[Yetti]

There is a troubleshooting guide in the back of the B-11 docs.    Start with first part.  Does the PC system pass the test?

It is just two wires to a heading bug or the VOR Indicator.   I think there are also some test points on the B-11.    There is also some gain settings.

Describe INOP.    It's like people saying their computer is broke.

[0TreeLemur]

So everyone knows, Cecilia Henderson of the former Brittain Industries sent me a Accutrak II maintenance manual today after I asked if I could buy a troubleshooting guide.  She did not charge me.  Even post-Brittain the support continues to be the best!

[0TreeLemur]

4 hours ago, Yetti said:

There is a troubleshooting guide in the back of the B-11 docs.    Start with first part.  Does the PC system pass the test?

It is just two wires to a heading bug or the VOR Indicator.   I think there are also some test points on the B-11.    There is also some gain settings.

Describe INOP.    It's like people saying their computer is broke.

INOP= dead, kaput, muerto, undiagnosable because no pulse, does nothing, indistinguishable from a brick.

[Hector]

INOP= dead, kaput, muerto, undiagnosable because no pulse, does nothing, indistinguishable from a brick.

I think you need to figure out if it’s the accutrack that is dead or something else like you are not getting a signal from the nav source or your servo control valve is bad. You can check the accutrack on a bench top fairly easy. Connect it to a 12volt source and put a 100 ohm resistor across the leads going to the servo control valve. You can at least now check for some voltages. Even easier find someone near you that has a working accutrack installed and swap boxes. If you want to fly to Jax Florida or meet somewhere we can try that.


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