What i have never understood, is why the cockpit module spar pin bushings ar
e not vertical slots, because when the wings are flexing under G, the lift p
ins take the fuse lift loads, and the spar flexing (under positive G) actua
lly force the spar pins _downard_ against the cockpit module....obviously t
otally 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 classic
had two 3/8 pins originally. Mod 52 uses the =C2=BD inch pins and a spar s
trap .
>
> As the wings pull forward under load, the fuselage would flex so they put i
n the cross bar and the new sockets.
>
> Then the concern was that the starboard wing spar could become dislodged f
rom the socket and interfere with controls. The quick fix was to hold in th
e spar tip with a pip pin. The port wing was figured would stay put, and th
e spar strap would prevent flexing of the spar.
>
> That is all I know. Andy would have the particulars on the detailed histo
ry. It sort of all makes sense.
>
> Best Regards,
> Bud Yerly
>
> Sent from Mail for Windows 10
>
> From: owner-europa-list-server@matronics.com <owner-europa-list-server@mat
ronics.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 an
d 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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