Hi! Andrew,
The washer/washers are bedded to take up any slack on the back of the
starboard spa tip and canister So contributing to retaining the Starboard
spa close secured to the Port Spa. The Starboard Spar is retained close to
the centre of the port spa by laying up the "cuff" surrounding the two spas
in the middle . The choice of a plain main pin on the starboard side would
have been to do with reducing cost but in any case since the wings fail
FORWARDS it is not so vital to retain the starboard spa from migrating aft
when it is close to the wing close out but it's tip will tend to be parted
---From its mate..
Many have purchased an additional pip pin to remove any uncertainty which
pin goes where !
Hope this helps ? But spoken from a pure layman ........with two pip pins !
Regards
Bob Harrison G-PTAG (Was it you who was sending me some pictures of main
gear spats which are hinged to fold upwards?)
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Andrew Sarangan
Sent: 03 September 2013 19:10
Subject: Re: Europa-List: Spar socket hole enlargement
Craig
I guess I don't understand the logic behind this setup. As I understand, the
pip pin is there to prevent aft movement of the spars.
So why is the pin only used on the port side and not the starboard side?
Later on we bond a hardened steel washer to the port socket to retain the
pip pin ball. This sounds structural to me, but I know the socket is
nonstructural, so I am obviously missing something here.
On Tue, Sep 3, 2013 at 4:50 AM, craig <craigb@onthenet.com.au> wrote:
>
> I believe the only reason for opening the hole to 1 inch is so it's a
> neat fit over the bushing in the spar itself That socket is the one
> with the pip pin installed in it which is supposed to be packed with
> washers so the pin doesn't move around guess the logic is you would
> just have to pack the pin more if you remove both sides out to one
> inch, as you say, though the consensus is that these pins are not
> transmitting any lift load, however before the strap around the spars
> was added, the pip pin would be stopping the end of the starboard spar
> moving rearward under those high lift high drag scenarios that were
> discussed at length a month or so ago by everyone when the wing is
> trying to move forward, which is why I believe the tie bar was added.
> So this may be one of those things that hasn't changed because it
> doesn't really effect anything in a bad way if its not altered. So you
> could probably remove it if you want to, the manual is quite clear the
> sockets are NOT structural, just a rigging aid to help you get the
> wings on. Feel free to correct me Bud if I got this all wrong
>
> Regards
>
> craig
>
> -----Original Message-----
> From: owner-europa-list-server@matronics.com
> [mailto:owner-europa-list-server@matronics.com] On Behalf Of Andrew
> Sarangan
> Sent: Tuesday, September 03, 2013 1:38 PM
> To: Europa List
> Subject: Europa-List: Spar socket hole enlargement
>
> --> <asarangan@gmail.com>
>
> The manual says to open up the port spar socket hole to 1" on one side
> only, presumably the side facing the seatback. So why not the other
> side? If the sockets are non structural, it would seem odd to sandwich
> its plate between the bolt head and the spar bushing. What am I
> missing here?
>
>
> -----
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