Europa-List Digest Archive

Fri 10/19/12


Total Messages Posted: 5



Today's Message Index:
----------------------
 
     1. 12:26 PM - Re: Re: Mod 73 (Richard Collings)
     2. 02:18 PM - Re: Re: Mod 73 (G-IANI)
     3. 03:25 PM - LG08 bushes (Kingsley Hurst)
     4. 03:43 PM - Re: Mod 73 (Alan Carter)
     5. 04:15 PM - Re: Mod 73 (Alan Carter)
 
 
 


Message 1


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    Time: 12:26:42 PM PST US
    From: "Richard Collings" <rcollings@talktalk.net>
    Subject: Re: Mod 73
    Hi Bud I have been following with interest this problem because whilst I was building my Europa I became very unhappy with the design which required a degree of precision machining and fitting that was not available to the average builder - me. I overcame the problem with mod 11969 which replaced the TP14 pins with close tolerance bolts which when tightened up on to a shaped nut plate mounted inside the torque tube clamped everything together so removing any chance of fretting taking place. There is little or no tube distortion and as I had to rig test my design in order to gain LAA approval, found that with all the bolts torque up to 200 lbs inches the assembly could transmit 90 lbs ft before slipping. No glue, no hammering. I would appreciate your opinion on this mod. Regards Richard Collings ----- Original Message ----- From: Bud Yerly To: europa-list@matronics.com Sent: Sunday, October 14, 2012 11:40 PM Subject: Re: Europa-List: Re: Mod 73 Pete and Bob Had the same kind of idea. Putting a slotted tube bored for the pins and use flush riveted nutplates in the tube with bolts to clamp the tubes together. Install by sliding in the nutplated tube and aligning the holes. However, that still will distort the tubes when the bolts are turned down making removal almost impossible as in tapered pins. My other idea was an expanding bolt. A 1/4 inch bolt with a steel insert in the center and two bronze bushings at the ends so that as the bolt is tightened, the bronze expands like a rivet and fills the small gap, making it tight. My A&P said, why not just rivet it in place. Just change the stab to allow it to rotate a full 90 degrees to allow riveting. However, what we have works, is maintainable and can be assembled by amateurs using drift pins and bolts (which allow a loose fit) during assembly and allows for a solid install provided the holes and pins are correctly sized for zero clearance. Good ideas though, Bud ----- Original Message ----- From: Pete To: europa-list@matronics.com Sent: Sunday, October 14, 2012 5:51 PM Subject: Re: Europa-List: Re: Mod 73 Thinking out loud here, what about very accurately machining substantive internal bolt bushings (made of a material to not cause galvanic corrosion), tap them all the way down the tube to their proper location, then bolt tight the two tubes without fear of distortion? Just throwing it out there, Cheers, Pete On Oct 14, 2012, at 4:47 PM, "Bob Harrison" <ptag.dev@tiscali.co.uk> wrote: You could drill and thread the heads of the parallel pins and use a bolt to Jack the out if needed. Regards Bob Harrison G-PTAG From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of GRAHAM SINGLETON Sent: 14 October 2012 18:14 To: europa-list@matronics.com Subject: Re: Europa-List: Re: Mod 73 No, they would distort the torque tube which must be perfectly circular Graham ------------------------------------------------------------------------- - From: Pete <peterz@zutrasoft.com> To: "europa-list@matronics.com" <europa-list@matronics.com> Sent: Sunday, 14 October 2012, 14:04 Subject: Re: Europa-List: Re: Mod 73 I fully understand the requirement for an interference pin fit to avoid the hammering out of the holes over time. That said, could "taper pins" be used? cheers, Pete http://www.matronics.com/Navigator?Europa-Listhttp://forums.matronics.com http://www.matronics.com/contribution ========= tp://www.matronics.com/Navigator?Europa-List ========= cs.com ========= matronics.com/contribution ========= href="http://www.matronics.com/Navigator?Europa-List">http://www.matron href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c


    Message 2


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    Time: 02:18:55 PM PST US
    From: "G-IANI" <g-iani@ntlworld.com>
    Subject: Re: Mod 73
    All Details of Richard Collings mod (11969) is available on the Club web site http://www.theeuropaclub.org/wp-content/uploads/2011/12/11969-TTpins.pdf For UK owners I would expect the LAA to treat it as a "repeat Mod" if you want to use it Ian Rickard G-IANI XS Trigear, 300hours Europa Club Mods Specialist e-mail g-iani@ntlworld.com


    Message 3


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    Time: 03:25:49 PM PST US
    Subject: LG08 bushes
    From: Kingsley Hurst <kingsnjan@westnet.com.au>
    Hello all, Our Mono has now done 477 hrs and 794 landings. To my dismay, I have just discovered that the bushes on the LG08 forks are quite badly worn. Before ordering new bushes, I am wondering if anybody knows of a more durable material from which these bushes could be manufactured. Regards Kingsley in Oz


    Message 4


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    Time: 03:43:10 PM PST US
    Subject: Re: Mod 73
    From: "Alan Carter" <alancarteresq@onetel.net>
    Hi. Richard. That looks a good fix to me, pulling up on both side of the tube, i can,t see that moving anywhere. Next project is to get rid of the pins on the TB12 drive plate, Make a drive plate with all the external edges angled at 90 degrees ,ie a male drive plate, and a mirrored female drive plate fitted to the stabilator, all of this female drive plate slides up into the male drive plate, all the surfaces making a tight contacting join.,and full transmission load spread over the entire surface, No little pins and no lugs, so no chance of miss alignment damaging or pin wear or breaking . All of this would last the life of the aircraft Alan Read this topic online here: http://forums.matronics.com/viewtopic.php?p=385675#385675


    Message 5


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    Time: 04:15:45 PM PST US
    Subject: Re: Mod 73
    From: "Alan Carter" <alancarteresq@onetel.net>
    A job done properly http://www.youtube.com/watch?v=bNzDg_6uLZQ&feature=youtube_gdata_player Alan Read this topic online here: http://forums.matronics.com/viewtopic.php?p=385677#385677




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