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TP12

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klaus.dietrich(at)oracle.
Guest

Posted: Mon Jun 25, 2007 1:16 am Post subject: TP12

in 1999 I glued my TP12 on to the TP4 torque tube using Loctite 603, because I had some play (less than 1/2"); today and some 700 hours later I can report that this fix proved itself as I have 0 play!

 Klaus 

 (MkI, OE-CKD)

 

                Date:        Feb 21, 1999                         From:        Klaus Dietrich <101613.3377(at)compuserve.com>                         Subject:        [url=/searching/getmsg_script.cgi?INDEX=9323947?KEYS=loctite?LISTNAME=Europa?HITNUMBER=93?SERIAL=01571730176?SHOWBUTTONS=NO]Re: TP6's[/url]           	  Quote: 	
		  I finaly decided to repair my play in the TP 12 by glueing it to the TP 4 torque tube.   I used Loctite 603 (for lightly oil contaminated parts, shear strength   3.700 psi) which I applied on the torque tube on the 10 mm inbord of TP 12. I did this only after careful in-situ testing how to soften the glue again in case of disassembling without heating the aircraft structure or softening the Redux holding the TP 11 bushes. In case you are going this route, here is the way to go: take a halogen bulb of 150W (size: 75 mm long) which will be centrally mounted between two discs (made of some scrap of the firewall material) with a diameter of 34mm. The discs are hold together by two threaded wire rods (2mm diameter) each with a nut on both ends. For the electrical contacts I disassembled the halogene spot (cost Euro 5,--) and used the small metall contacts which I mounted centrally to the discs. The electric cables which are crimped on the contacts are running on each side of the assembly. The complete assembly is than slided into the torque tube and placed exactly under the TP 12 well inboard of the TP 11 bushes, where the glue is. One cable will go to the left and one to the right end of the tube. When you switch on the light, very concentrated heat will be emitted by the bulb which heats the   tube from the inside on a length of not more than 70 mm. The Loctite needs   about 150=B0C to soften completely. This temperature will be reached easily after 2 to 2,5 minutes. You can than slide the TP 12 out again and swich off the heat. The "firewall discs" help to concentrate the heat and the TP 11 bushes don't get any more than "handwarm" (not more than 40=B0C). Thanks to Jim N. for this idea! It works perfectly. For those who are still building, make shure you are using anchor nuts to fix the servo motor and the trim assembly below as well as shackles or turnbuckles for the safety cables which are holding the counterwight......this will asure you an easy disassembly of all the "mechanics" in the back of the fuselage; something which inevitably will happen sooner or later..... Obviousely you'll need also an access panel at this very strategic place.....You may also file the heads of the pins square to be able to turn them with a spanner to position the hole of the split pin. Have fun...it's just a 10 minutes fix (I'm Ivan's disciple....) Klaus   	
 -- 

         v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);}  <![endif]--> vCard      Klaus Dietrich   Klaus Dietrich   4   2   2007-01-04T14:23:00Z   2007-01-16T12:05:00Z   1   15   88   Oracle Corporation   1   1   108   9.7616   <![endif]-->      <![endif]-->       <![endif]-->                                                                                                                                                                                                                                           

Klaus Dietrich                                                                                                                          

Oracle Financing EMEA

 Tel/Fax: +43 1 33 777 825                         

http://www.oracle.com/financing                                                                                                           

                                                                             

                                               

                     

        document.write("")          

                 

  

 

    [quote][b]

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ptag.dev(at)tiscali.co.uk
Guest

Posted: Mon Jun 25, 2007 2:47 am Post subject: TP12

Hi! Klaus  

I appreciate your posting, however how can you be sure that the loctite penetrated on both sides equally and how can you calculate when the bond may fail?  

My torque tube is nickel plated and there is evidence of the nickel breaking away …just could take your bond away ?  

Regards  

Bob Harrison G-PTAG   

     

Robt.C.Harrison  

  

   

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klaus.dietrich(at)oracle.
Guest

Posted: Wed Jun 27, 2007 12:23 am Post subject: TP12

Hi Bob,

 

 I agree with you that there is no "guarantee" the bonding with Loctite will hold.....

 I suggest it may be a fix for those assemblies where you have just very little play (below the tolarated 1/2", which was my case back in 1999, due to "bad" building....).

 And in my case the fix with Loctite 603 proved to hold untill today (7 years and 700hrs+)

 

 But of course the best fix is mod 62, properly done outside the aircraft....

 

 Klaus

 -- 

         v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);}  <![endif]--> vCard      Klaus Dietrich   Klaus Dietrich   4   2   2007-01-04T14:23:00Z   2007-01-16T12:05:00Z   1   15   88   Oracle Corporation   1   1   108   9.7616   <![endif]-->      <![endif]-->       <![endif]-->                                                                                                                                                                                                                                           

Klaus Dietrich                                                                                                                          

Oracle Financing EMEA

 Tel/Fax: +43 1 33 777 825                         

http://www.oracle.com/financing                                                                                                           

                                                                             

                                               

                     

        document.write("")          

                 

  

 

    [quote][b]

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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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