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Composite-ARF INTEGRAL
techsupport@composite-arf.com
ufacture. These fit servos of 15 x 32mm (eg: Futaba 3002, 9650, 9602/JR 3728, 3241).
Balsa blocks (30mm wide) are glued into the elevators during manufacture, at the control horn
position. The centre of the block is 45mm from the root end of the elevator, as indicated by the
2 small milled holes in the leading edge of the elevator.
Phenolic Control Horns: If you use our phenolic horns you can mill slots through the bottom sur-
face of the elevators into the balsa blocks, at least 15mm (5/8") deep, scuff up the gluing-surface
of the phenolic horn, and glue them into the slots with epoxy and micro-balloons mixture. The
holes in the horn (for the clevise) should be perpendicular to the hinge axis in the neutral eleva-
tor position (see photo P3).
If you chose a different type of control horn, that is screwed or bolted to the control surface, then
you must reinforce these balsa blocks in the positions of the screws. One method is to drill Ø
8mm (3/8") holes into the balsa blocks, at least 15mm deep, and glue good quality hardwood
dowels in position with slow epoxy, and screw into these.
Rudder
The rudder is hinged using the Ø 2mm wire provided, which passes thru' the phenolic hinge
posts that are factory installed and aligned (see photo P5). Make a short 90 degree bend in the
bottom end, and tape this to the base of the rudder to prevent it coming out in flight.
A balsa block (10mm high) is glued inside the rudder during manufacture, exactly at the control
horn position. The centre of the block is 152mm from the bottom of the rudder, which is the cor-
rect position for the horn if using the supplied rudder servo mounting plate. Mill a slot for the rud-
der horn right thru' the rudder and the block. The front of the slot should be approx. 25mm from
the leading edge of the rudder (see P6). Prepare gluing surface of phenolic horn and glue in with
epoxy and micro-balloon mixture. Make sure that horn is exactly symmetrical in the rudder, and
that the holes for the clevises are exactly in line with the hinge wire, not the leading edge of the
rudder.
Provided in the wood pack is a milled carbon/balsa sandwich rudder servo mounting tray, which
should be securely glued into position as shown (photo P7). The servo cut-out fits a standard
sized servo (approx 20 x 40mm). The front corners of the tray fit into the milled notches in the
bulkhead at the back of the cockpit opening. Glue small strips of the 3mm ply sheet underneath
the tray to reinforce where the servo screws are fitted.
The dimension between the clevise holes in your chosen rudder servo output arm should be
exactly the same as those in the phenolic rudder horn (58mm/2.3") for a closed-loop rudder link-
age. Therefore it is also simple to locate the small holes needed in the fuselage for the pull-pull
cables to exit - as it will be where the fuselage is exactly that wide.
Suitable servos include Futaba 9151, 9155, or JR 8611.
Wings
The wing spar is a Ø 30mm x 575mm carbon/foam sandwich tube, specially produced for the
Integral. Each wing has a pair of 10mm diameter carbon tube anti-rotation dowels, factory-
installed and aligned. Each wing is retained onto the fuselage by a single M6 plastic nut, which
screws onto a 6mm plastic bolt that is factory installed inside the root rib (photo P8). A plywood
reinforcing plate is factory-fitted inside the fuselage for the nut to pull up against.
Balsa blocks (30mm wide) are glued into the ailerons during manufacture, at the control horn
position. The centre of the block is 50mm from the root end of the aileron. If using our phenolic
7
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