The way I'm interpreting the need for this mod, is that it is only for
914's or 912-S Europas with props heaver than 25 lb's is that correct?
Are their those that feel and is there a reason they feel mod 72 should
be placed on all Europas?
Jeff
N128LJ / Gold Rush
On Jan 19, 2007, at 9:56 AM, Rob Housman wrote:
>
> Mod 72 provides added strength, in particular in bending, by adding
> thickness to the wall of the tube. It is the added thickness that
> provides
> the additional strength and because there are no forces that would
> tend to
> move the insert along its axis (relative to the original tubing) there
> is no
> need for bonding it into the frame.
>
> Epoxy used to create a bond between the original tube and the insert
> would
> be a weak annular region that could allow the original tube to deform,
> albeit very slightly, if the epoxy were to extrude out of the gap.
>
> As for corrosion protection, remember that the original frame is powder
> coated only on the exterior so nothing much changes when adding the
> insert.
>
>
> Best regards,
>
> Rob Housman
> A070
> Airframe complete
> Irvine, CA
>
> -----Original Message-----
> From: owner-europa-list-server@matronics.com
> [mailto:owner-europa-list-server@matronics.com]On Behalf Of Robert
> Borger
> Sent: Friday, January 19, 2007 5:48 AM
> To: europa-list@matronics.com
> Subject: Europa-List: Mod 72 question
>
>
> Fellow Europaphiles,
>
> The Mod 72 topic has become too quiet. I've decided to give it a poke
> and
> see if I can wake it up again.
>
> I have all the various bits for Mod 72 on order. Etching primer,
> ACF-50,
> 16.5 mm hand reamer & Mod 72 kit.
>
> I am wondering why the heavy wall tubing is not bonded in place with
> something like Redux.
>
> Is the press fit good enough to support the frame?
>
> Would it be better to Redux the insert in place? Better support and
> corrosion protection?
>
> If not, why not?
>
> Good building and great flying,
> Bob Borger
> Standing by, wearing my nomex undies, ready for the flames.
>
> P.S.
> The reamer will be available for loan to any Europa builder in the
> U.S. or
> Canada who needs it for Mod 72.
>
>
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