Posted by Jorgen on Sunday, December 5, 2010 @ 07:27 PM:
Hi Fournieteers,
we discussed Fournier anatomy around the tailwheel of RF 5 b's, so here is a short version: with the tailplane, rudder and fin removed, the fuselage ends with a box. This box has a reinforced rear wall in which the fin is bolted and a forward, thinner wall (the first "bulkhead" on the picture below). The "roof" of the box is a thin plywood layer visible under the tailplane and the "floor" of the box consists of a thin plywood layer and the curved, outer skin of the fuselage underside. The tailwheel sits in a wooden block, attached to the "upper floor" and the curved underside. Along the sides, the tailwheel block is supported by two longitudinal, thicker plywood stringers. The picture below was sent to me by Eugenio and shows a RF 5 fuselage flipped uppside down, the tailbox is seen with the tailwheelblock fitted to the flat "upper floor" visible, the curved plywood underside is not glued in place yet. The tail is sitting low so you can imagine where moisture can accumulate and appreciate the need for draining holes in this area.
May the 4's be with you/ Jörgen
[Edit by Jorgen on Sunday, December 5, 2010 @ 07:33 PM]
Posted by Ray Phillips on Monday, December 6, 2010 @ 04:35 PM:
Very helpful post.
Does anyone know the thickness of these various plywood members?
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