complete one assembly before proceeding to the next step. The builder can also read ahead and determine possible
subassemblies which need to build, and construct them in advance of their installation, and thus keep several items going at
once, saving some overall drying time and speed completion. These basic subassemblies are the joined wing halves, fuselage,
horizontal stabilizer and the fin assembly.
The original aircraft was a free flight glider. It was modified to single channel radio control when there was only heavy and
bulky radio available. Now, with our much smaller and lighter radio control systems, the plan has been modified by caramba
to use two servos for direction and elevator. There is a lot of place inside the fuse to install the components and choice is left
to builder. But keep in mind that they should be installed as far forward as possible. Note that having seen Sinbad with
ailerons, we don’t especially recommend using them.
1.
Wing assembly:
Cut the main spar a little bit longer than the plan indicates. Cover the plan with wax paper and lay out the main spar on the
plan; Shim up with 5mm (3mm for the 155cm version) wood and hold in place with weight. Slip on and glue the ribs W2 and
W3 in place. While glue is setting weight the trailing edge of the ribs so that they stay on a straight line. Set up the HARD
balsa or pine upper spar. When dried, remove weights, flip over and add the bottom spar.
Cut and sand the trailing edge to the profile indicated on the plan. When done, lay it on the plan and weight it. Lay also a
strip along the position of the spars.. Then lay the wing assembly on the plan, along the trailing edge, making sure that the
joint between ribs and trailing edge is perfect. Slide the strip accordingly. When finished, this ought to aim the trailing edge
down at the right angle.
After assembly, remove and glue leading edge in place, using rubber bands to keep it in place. Lay out now all the “W” parts
for the tip. Glue W8 and W9 together and W6 and W7 together also. Lay the wing half on the plan again and test fit the two
assemblies. Trim the main spar to fit the tip assembly and cut W6 and W9 to fit appropriately the trailing and leading edge.
Glue the two assemblies in place, taking note that a 5mm (3mm for the 155cm version) may be necessary for the wing tip to
obtain the desired undercamber. Do not glue the two spars now! Wait until dried and then trim them without gluing them in
place. Slide in place W4 and W5 and glue them. Squeeze together the trimmed two spars and glue them in place. Add now
W5A and taper the small end to match the tip assembly. Block plane and sand the leading edge into the wingtip per the
shape on the plan. Taper the upper edges of the wingtip and spars to match the shape shown on the plan.
Cut some balsa sheet to 65mm (50mm for the 155 version). Test fit and glue in place to the upper leading edge. You can use
clothes spin to keep it in place while drying. To ensure no warps, set the wig on a FLAT surface and weight it. Add now the
bottom sheeting the same way. Sand the entire wing half to a smooth surface, round tip edges and leading edge, and taper
the leading edge as per the plan. Build the second half the same way. Sand the centre of the wing so that, when joined, the
correct dihedral measurement will be obtained at the tip. Slide in W1 and glue dihedral braces W-G to one wing half. When
dried, slide together, test fit, trim and glue tight.
2.
Fuselage assembly
The fuselage is based on a horizontal framework, a lower keel and an upper crutch, each assembly treated separately and
then combined into a final assembly.
Soak about 50cm of a pair of 120cm long balsa 8*8mm strips (5*5, 30 and 80 cm for the 155cm version). Using the plan
framework view, cut a few (but not all) of the 8*8mm perpendicular stringers to length indicated, and keep them in place
with weights or pins. Lay out the soaked spars on the plan, and bend to shape noted, trim and taper the rearmost of these
