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Gretz Pitot & Aileron Trim

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fritzsch(at)eskimo.com
Guest

Posted: Wed Apr 25, 2012 3:06 pm Post subject: Gretz Pitot & Aileron Trim

Two questions:



1.  Where have you mounted the Gretz control module?  Ideally it would 

be mounted so that the face of the wire connecting block and the screws 

that hold the wire in place would be easily accessible from the 

inspection opening.  The location of the three attachment points on the 

module make that a little difficult.  I have placed the head mount in 

the position called for by the plans.   Access would seem to dictate 

that it be mounted on the inspection hole side (outboard side) of the 

rib with the pitot mount on the inboard side of the rib, but I can's 

seem to find a position that would make both the connecting face and the 

screws on the module easy to see and tighten.



2.  It would appear to be much easier to install the aileron trim before 

the bottom skin was attached.  But as I read the instructions for the 

trim servo, it looks like one has to wait until the ailerons are 

attached to the wings and possibly the wings are attached to the 

airplane.  Is that correct?



Dave



-- 

~~~~~~~~~~~~~~

Dave Fritzsche

40813

Puyallup, WA

Wings

~~~~~~~~~~~~~~~

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rene(at)felker.com
Guest

Posted: Wed Apr 25, 2012 3:54 pm Post subject: Gretz Pitot & Aileron Trim

I mounted my Gretz control module to the inspection plate.  Easy and

accessible.



I did my Aileron trim after the wing was on the airplane....but I think you

could do it after the bottom skin was on but before you put the wing on the

airplane.



Rene' Felker

N423CF

801-721-6080



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carl.froehlich(at)verizon
Guest

Posted: Wed Apr 25, 2012 4:29 pm Post subject: Gretz Pitot & Aileron Trim

You can of course fit up the aileron trim servo mount onto the inboard left

wing inspection plate.  You cannot fit the aileron trim spring attachments

to the aileron push tube until after the wings are on and the control

surfaces are rigged.  The aileron push tube needs to first be correct,

"stick centered" position to determine where to put the spring attachments.

Remember that the push tube is easily removed via the wing tip once you mark

where the attachments go.



Carl

Pitot static test completed today - trying to get the FSDO out the first

week in May. 



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bwestfall

Joined: 22 Oct 2008
Posts: 131
Location: Portland, OR

Posted: Wed Apr 25, 2012 6:10 pm Post subject: Gretz Pitot & Aileron Trim

I thought it would be easier to install the gretz using molex connectors for

the wires so I mounted the assembly just inside of the wing rib inside the

inspection plate.  I split the wires leading from the pitot to the control

unit and added appropriately sized molex connector.  The thought being that

installing the pitot is just a matter of snapping the molex connector tight

instead of trying to work those little screws while upside down.



Not flying yet so as to effectiveness and reliability....  WAG.



Ben Westfall

40579

Portland, OR



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mara(at)leasenet.net
Guest

Posted: Wed Apr 25, 2012 7:16 pm Post subject: Gretz Pitot & Aileron Trim

Dave, I don't normally post but I think my installation worked out well.

I have posted three different views.  I would not place the controller

outboard of

the rib.  The two AN3's are easily reached thru the access cover.



Ron Mara

Addison, Texas

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mara(at)leasenet.net
Guest

Posted: Wed Apr 25, 2012 7:17 pm Post subject: Gretz Pitot & Aileron Trim

Sorry, size restriction... here's the third photo.

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