Noting that compressive spinal injuries can result from the geometry of
the shoulder straps and seat back in the Europa in the event of an
accident or even just a hard landing, I fabbed these hinged risers which
eliminate the downward component of the resultant forces. Attached to
the shoulder harness embedment, the riser was tested with a hydraulic
press by applying 1500# (10 G=99s, assuming 150# upper body
weight) force forward across the slot which captures the straps.
In the down position, they permit normal entry and exiting; when
you=99re seated and slip into the shoulder straps, the straps
raise the riser to the upright position=9Dworks a
treat=9D.
Made from scraps of 1/8=9D plywood, 1/8=9D Lastafoam, and
BID, they weigh about a pound a piecehappy to share details
upon request.
Fred
A194
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