Carf-Models DG 800 S Instruction Manual page 3

Important/General Notes
Elastic Hinges:
The ailerons, flaps and elevator are all hinged already for you - laminated in the
mould and attached with a special nylon hinge-cloth, sandwiched between the
outer skin and the foam. This nylon hinge is 100% safe and durable. You will never
have to worry about breaking it, or wearing it out. There is no gap at all on the
top side of the surface, and there is a narrow slot in the bottom surface, where
the control surface slides under the skin during 'down' throw. This means that the
hinge axis line is on the top surface of the wing and stab, not in the centre.
The slot seal needs some explanation, too. The bottom side of every control
surface is sealed with the same type of sealing tape the full scale aircraft is
sealed with. It is a sandwich of several special tape layers, one being a specially
pre-curved mylar sheet. Take care of this tape as it is very important for the
proper function and the designed efficiency of all control surfaces.
Servo Choice:
We strongly advise that you use the recommended high-torque digital metal-
geared servos on all the main flight controls, and the milled plywood mounts are
specifically designed for these.
There are plenty of alternative servos available from many manufacturers.
However, it is important that you measure the "hight" of the servo from the
mounting flanges to the control arm. This dimension is important to know BEFORE
you glue any mounting frames in the stab or wing.
Servo Screws:
Fix the all the servos into the milled plywood servo mounts using the 2.9 Ø
x13mm or 16mm sheet metal screws provided in the kit, not the standard screws
normally supplied with servos by the servo manufacturer. This is because all the
holes in our milled servo mounts are 2mm diameter, due to our CNC
manufacturing process, and this is too big for the normal screws.
Building Sequence:
The actual building sequence is your choice, but it is definitely most efficient to
follow the sequence of this manual.