Hi! Troy /all
I have the 1/2" pip pins both sides.
I saw Andy Drapers message , however IMHO I consider that the use of the pip
pin on the starboard side (if it is installed correctly and arranged to just
hold the starboard wing spa at the root to be snug to the Port Side spa tip
an improvement on the welded cap screw arrangement.
Regards
Bob Harrison.
----- Original Message -----
From: "Troy Maynor" <wingnut54@charter.net>
Subject: RE: Europa-List: Wing spar pins
>
> Hi All,
> Being a builder of a classic, I am wondering how this affects me and why I
> have not heard of pip pins being used. Am I to redux a hard washer to the
> starboard spar tip and buy a pin. Guidance needed for a slow classic
> builder.
> Troy Maynor
> N120EU Monowheel Classic
> Left to finish:
> Paint,interior,engine install, wiring.
>
> > -----Original Message-----
> > From: owner-europa-list-server@matronics.com
> > [mailto:owner-europa-list-server@matronics.com]On Behalf Of Andy Draper
> > Sent: Tuesday, February 10, 2004 4:33 AM
> > To: europa-list@matronics.com
> > Subject: Re: Europa-List: Wing spar pins
> >
> >
> > <andy@europa-aircraft.com>
> >
> > Dear All,
> >
> > I will confess that I have only looked at a few of the postings
> > about the spar pins, but what I have seen indicates that the main
> > question is about why there is only one Pip pin type spar pin and
> > why this one should be on the port side. The reason is due to
> > the layout of the spars.
> >
> > During static load test, it was discovered that, at high loading,
> > the tip end of the starboard wing's spar began to slide aft off
> > of the port pin. The further it moved the greater the bending
> > force it applied to the pin, making it yet easier for the spar to
> > slide off it. On the first test, the spar came off the pin (at
> > around the equivalent of about 7.5 'g' I should add) allowing the
> > wing to rotate and the spar tang to slice its way through the
> > fuselage bottom. It was clear that we needed to prevent the spar
> > end to slide aft when under load.
> >
> > Initial thoughts went to bolts and nuts, but this would make
> > rigging and derigging slow and labourious (we fitted this
> > arrangement to the first XS, so we know from first hand). The
> > pip pin was tested and proved to work well. The loads on the
> > pips meant that a hardened steel washer was required to prevent
> > them damaging the spar bush, hence its inclusion. However, due
> > to the high cost of the pip pins and as it was only needed to
> > secure the end of the starboard spar (the spars overlap each
> > other such that the port spar is sandwiched between the seat back
> > bulkhead and therefore has no possibility of moving) it was
> > decided to stay with the tried and tested high strength bolt with
> > its welded in Allen key.
> >
> > I hope that I have not missed the real thread of the discussion,
> > but perhaps the above will answer some questions anyway.
> >
> > Best Regards
> > Andy Draper
> >
> > Technical Director
> > e-mail andy@europa-aircraft.com
> >
> >
> > >>> "Fergus Kyle" <VE3LVO@rac.ca> 10/02/04 03:27:33 >>>
> >
> >
> > ----- Original Message -----
> > From: <DuaneFamly@aol.com>
> > To: <europa-list@matronics.com>
> > Subject: Re: Europa-List: Wing spar pins
> >
> >
> > |
> > | Ferg,
> > |
> > | Seems to me by the response that a PIP pin in the starboard
> > side would be
> > bad
> > | as long as it inserted and removed easily. Any problem with the
strength
> > of
> > | the PIP pin? It could also be backed by washers as on the port side.
> > Wouldn't
> > | hurt?
> > |
> > |
> > | Mike Duane A207
> > | Redding, California
> > | XS Conventional Gear
> > | CM & rudder pedals with cables installed. Working on tailwheel
> > and baggage
> > | bay. Trial fit of top and both wings. The wings fit! Conventional gear
> > soon.
> >
> > Mike,
> > Well, I don't know. I kept the bolt version starboard side,
> > 'cause the manual said to. No, I don't think there is any problem with
the
> > pip-pin's strength since it's used portside, but the extra cost of the
> > 'ears' isn't utilised, so why use it. Peter Zutrauen had it right when
he
> > mentioned the need for it portside, but I don't see how it can be
> > needed on
> > the starboard. My only caution there was the need to pen it in with the
> > original fixture since the dimensions MIGHT keep the ears in and allow
the
> > starboard pip-pin to vibe out. If you use the retainer specified in the
> > manual, what is the advantage of the pin-pin? How would you apply the
> > washers, since no dimension is given (might be same as port) and pin is
in
> > the cup...........?
> > Just mulling...........
> > Cheers, Ferg
> >
> >
>
>
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