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Ziroli 1/7 (120") B-25 B scale build
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07-09-2014, 09:48 PM
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rossmick
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Join Date: Jun 2010
Location: Vail, AZ
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Nacelle, stab, elev, vertical fin, rudder
Nacelle stringers completed except for lowest stringers on left nacelle.
Stab assembled with magnet board method, used straight edge on TE spar to keep it aligned. I have not glued in the rib next to vertical fin to figure out best attachment method and structure to hide the rudder push rod as in the full size B-25. I have extended the spruce spars through the fin for extra support. I also used spruce on the leading edge for extra strength on the stab. Sheeted the top with 1/16 as per plan.
Leading edges on elev. and rudder laid up with extra material around the hinge tube.
Used internal 1/16 aviation ply for elevator and rudder as structure via the plan looked pretty flimsy for cloth covering. This took more time and layout but will produce a much stronger and straighter structure. I did weigh the ply after lighting holes were done and it came to 4.9 oz. so there should not be too much additional weight in the tail section. Also the ply should provide for a great TE. Note that the elevator was corrected to scale and the biggest issue was the angle off the rudder.
Vertical fin prove to be a little harder to build than I first guessed, but with the magnet squares, small square on the ribs, and clamps, all went together straight and true.
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Last edited by rossmick; 07-10-2014 at
03:33 PM
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