Circa Reproductions Inc.
PO Box 88683
Surrey, B.C. V3W 0X1

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Update, Morane N

The Morane N project continues, photos and progress report coming soon. (mike lee)


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A note from Michael Lee - and the experimental nature of Graham Lee's aircraft designs




MAY 2009: IMPORTANT MORANE PLANS CLARIFICATION.

A recent structural load test indicates that the rear lift wire pylon
requires brace wires..


NOTE: the Morane plans do make a comment about wire braces FORE and AFT for the lower V on page 24,
(My father was thorough, but sometimes understated.) At this point it's clear that the pylon requires bracing
against fore and aft loads. It may also be prudent to attach the pylon with AN-3 bolts, rather than 3/16 inch rivets.
More details and specific recommendations to come shortly.
ml



Destructive load test and photos courtesy of Al Todd,
Thanks again AL!


under static load, the rear lift wires have a slight aft force component relative to the pylon
This caused the support frame to bend backwards, and sheer the rivets
which attached it to the gusset.


Photo showing the detached support frame. Note the gusset is intact, failure is purely due
to sheer of the rivets, due to the aft force of the lift wire.







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