You rotated the pins in flight?!! Yikes!
It kinda makes sense but ....
William Daniell
LONGPORT
On Sun, Aug 11, 2019 at 4:35 AM D McFadyean <ami-mcfadyean@talktalk.net>
wrote:
> I would add that in level flight at 1g, my spar pins are as easy to rotat
e
> in their holes as when sat on the ground.
>
>
> DMcF.
>
> On 11 August 2019 at 09:19 D McFadyean <ami-mcfadyean@talktalk.net>
> wrote:
>
> That analysis assumes the fuselage structure to be inelastic and utterly
> unyielding, whilst the spar is privaleged to flex.
>
> All of the vertical loads going in to the lift pins have to pass through
> the fus structure too, which will yield to a greater or lesser extent.
>
>
> Duncan Mcf.
>
> On 10 August 2019 at 22:47 Pete <peterz@zutrasoft.com> wrote:
>
>
> What i have never understood, is why the cockpit module spar pin bushings
> are not vertical slots, because when the wings are flexing under G, the
> lift pins take the fuse lift loads, and the spar flexing (under positive
> G) actually force the spar pins _downard_ against the cockpit
> module....obviously totally counter-productive.
>
> Pete
> A239
>
> On Aug 10, 2019, at 5:29 PM, Bud Yerly < budyerly@msn.com> wrote:
>
> Fred,
>
> Back before my time when mod 52 was done for the GW increase. The classi
c
> had two 3/8 pins originally. Mod 52 uses the =C2=BD inch pins and a spar
strap .
>
>
> As the wings pull forward under load, the fuselage would flex so they put
> in the cross bar and the new sockets.
>
>
> Then the concern was that the starboard wing spar could become dislodged
> from the socket and interfere with controls. The quick fix was to hold i
n
> the spar tip with a pip pin. The port wing was figured would stay put, a
nd
> the spar strap would prevent flexing of the spar.
>
>
> That is all I know. Andy would have the particulars on the detailed
> history. It sort of all makes sense.
>
>
> Best Regards,
>
> Bud Yerly
>
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
>
>
> ------------------------------
> *From:* owner-europa-list-server@matronics.com <
> owner-europa-list-server@matronics.com> on behalf of Fred Klein <
> freddythek10@gmail.com>
> *Sent:* Thursday, August 8, 2019 1:29:43 AM
> *To:* europa-list <europa-list@matronics.com>
> *Subject:* Re: Europa-List: Reaming of spar and CM bushes
>
> Budyou mention the use of the SouthCo pip pin on the port side a
nd the
> Allen bolt pin on starboard.
>
> Do you know the reason for using different types of pins here?
>
> Is there any downside to using SouthCo pip pins both port and
> starboard?seems I=99ve heard that some builders have done
so.
>
> Fred
>
> On Aug 7, 2019, at 8:35 PM, Bud Yerly < budyerly@msn.com> wrote:
>
> The SouthCo pip pin is nominally .4985 inches.
> The Allen bolt pin for the starboard side is .497 to .495.
>
>
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