PC wing leveler control unit

[pgrusenmeyer]

My 1963 M20C PC wing leveler control unit is missing parts, including the on/off switch and the knob for the trim adjustment. When I test flew the plane the system appeared to work (had to turn off and on with the breaker). Given the missing parts, I've unplugged the control unit which disables the system, but would like to able to use it.

Any suggestions for finding parts or a replacement control unit would be appreciated. Pictures attached. It appears to be original equipment. Control unit reads Mooney Autopilot on the front panel. It is made by Aircraft Radio Corporation (Boonton, NJ), called a Controller-Amplifier Type C-593B-2 (14 volt), serial #101.

Thanks,

Pat

[Hank]

The PC in my '70 C is not turn off-able, it is on all the time except when I hold down the thumb switch.

PM your email, I'll send you the documentation that I have, several PDFs from Brittain.

What king of breaker do you have to turn off the vacuum?

[pgrusenmeyer]

Hank,

 

Sent PM with email.  Documentation would be helpful.  I have none and my Goggle search turned up nothing.  The breaker turns off the PC wing leveler control unit, not the vacuum.  Clearly the control unit had an on/off switch, at least it appears to have had one, since there are on/off indicators on the unit.

 

Is this unit made/serviced by Brittain, not Aircraft Radio Corporation?  

 

Thanks,  

Pat 

[Marauder]

If I am not mistaken, these autopilots are part of the ARC family (i.e. the kind you find in Cessnas). Let me googled it...

 

http://mooneyspace.com/topic/12512-arc-autopilot-repair/

 

http://www.ebay.com/itm/Mooney-ARC-Autopilot-Controller-C-593B-2-/190488357278 (I found your missing knob  )

 

I would try these guys first: http://autopilotcentral.com/?page_id=9

[pgrusenmeyer]

That's my understanding.  ARC was purchased by Cessna (maybe late 1950s) and Cessna put these into their planes.  

[Marauder]

That's my understanding.  ARC was purchased by Cessna (maybe late 1950s) and Cessna put these into their planes.  

 

Check out the eBay link...

[Yooper Rocketman]

The PC in my '70 C is not turn off-able, it is on all the time except when I hold down the thumb switch.

PM your email, I'll send you the documentation that I have, several PDFs from Brittain.

What king of breaker do you have to turn off the vacuum?

 

In my 1968 F model I just lifted the override button up on the yoke an 1/8" (with my fingernails) and it disconnected the auto function.  Can't remember if I figured it out or the previous owner showed me that, but made for an easy on/off function.

[Hank]

I almost never use the button. Outside the pattern, about the only time to use it is while practicing holds since I never get real ones.

In the pattern, the extra resistance reminds me to bank gently. Except for this morning, departing toward R-space and the tower told me to "stay clear of the R space at all times." I had landed on 31 earlier and was now departing on 13 out of KCSG, so right at the end of the runway, > 700 agl I banked hard right while climbing at Vy. Kinda fun!

[ryoder]

Hank I am surprised to see how PC you are.

[pgrusenmeyer]

Thanks for all the responses.  

 

Chris (Marauder) You are the man.  The link on EBay is exactly my control unit, a couple numbers higher on the serial number.  I ordered it.  Hopefully it works.  I believe this is a PC different unit than the Brittains.  There is no switch on the yoke for the PC.  

 

When I took my unit apart, the on/off switch was removed and the wires twisted together to permanently turn it on.  What great engineering   Maybe I can find a switch in case I need a back up unit.  

 

Thanks, 

Pat

[Hank]

Hank I am surprised to see how PC you are.

Only in the Mooney, not in my opinions!!