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Mounting the control stick-advice on the nut and bolts

 
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Mark Roberts



Joined: 06 Mar 2012
Posts: 265

PostPosted: Sun Sep 09, 2018 4:27 pm    Post subject: Mounting the control stick-advice on the nut and bolts Reply with quote

I have the appropriate Aircraft Spruce ordered AN bolts and nuts, etc.

1. What I am wondering is about the way to assemble them. Do I mount them nut side up through the floor, or bolt head inside- nut side down... I am using lock nuts, and where called out, the cotter pin style (I am going from memory as I have yet to refer back to the plans since restarting the build- but will before installing).

2. Is a washer enough to keep the lower part of the assembly from digging in and crushing the bottom of the plywood on the underneath side, or should I weld either the nuts or heads to a plate so they are tied together somehow.

I am thinking that once I put the fabric on, the heads or nuts will not be accessible without cutting and repairing the fabric, so what’s best? I don’t believe these were called out to be cotter pinned in.

I have the EAA Books, but don’t remember if this was addressed.

Thanks for the help.

Mark


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bickers.ken(at)gmail.com
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PostPosted: Sun Sep 09, 2018 4:59 pm    Post subject: Mounting the control stick-advice on the nut and bolts Reply with quote

Mark, you want to let gravity and slipstream be your friend.  Put the bolts in so that, if the nut were to work free, the bolt wouldn't want to exit the airplane.  That means point bolts down and to the rear, unless you absolutely have no alternative.  Against wood surfaces, place an AN fender-sized washer between the bolt head and the structure, as well as between the nut and the structure, in order to spread the loads.  Sounds like you are making good progress.  Enjoy, Ken

On Sun, Sep 9, 2018 at 6:27 PM, Mark Roberts <mark.rbrts1(at)gmail.com (mark.rbrts1(at)gmail.com)> wrote:
Quote:
--> Pietenpol-List message posted by: "Mark Roberts" <mark.rbrts1(at)gmail.com (mark.rbrts1(at)gmail.com)>

I have the appropriate Aircraft Spruce ordered AN bolts and nuts, etc.

1. What I am wondering is about the way to assemble them.  Do I mount them nut side up through the floor, or bolt head inside- nut side down...  I am using lock nuts, and where called out, the cotter pin style (I am going from memory as I have yet to refer back to the plans since restarting the build- but will before installing).

2. Is a washer enough to keep the lower part of the assembly from digging in and crushing the bottom of the plywood on the underneath side, or should I weld either the nuts or heads to a plate so they are tied together somehow.

I am thinking that once I put the fabric on, the heads or nuts will not be accessible without cutting and repairing the fabric, so what’s best?  I don’t believe these were called out to be cotter pinned in.

I have the EAA Books, but don’t remember if this was addressed.

Thanks for the help.

Mark




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Mark Roberts



Joined: 06 Mar 2012
Posts: 265

PostPosted: Sun Sep 09, 2018 5:04 pm    Post subject: Re: Mounting the control stick-advice on the nut and bolts Reply with quote

So THAT’S what that bag of fender washer I bought are for!

Thanks Ken. Just what I needed.

Mark


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oldbird



Joined: 23 Apr 2015
Posts: 98

PostPosted: Tue Sep 11, 2018 3:25 am    Post subject: Re: Mounting the control stick-advice on the nut and bolts Reply with quote

Hi all,

I used T-nuts to attach the control torque rod (pipe) bearings to bottom 1/4" plywood. I also reinforced the holes with 1/8" 5 layer aircraft ply. I am going to use Loctite to prevent the bolts from loosening. You can see one of the reinforcements in the attached photo.

Semih Oksay
TC-RSO
Istanbul, Turkey


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IMG_3969 (Small).JPG
 Description:
1/8" ply reinforcement for the front left rudder pedal bearings.
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IMG_3969 (Small).JPG


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