Building Instructions - Composite-ARF SPARK Instruction Manual

Composite-ARF SPARK
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A view of the complete SPARK kit contents - Product #742000

Building Instructions

General Tips
We recommend that you follow the order of construction shown in this manual, generally start-
ing at the back of the plane and working forward - as it makes access to everything easier and
saves time.
Protect the finished paint on the outside of the model from scratches and dents during building
by covering your work table with a piece of soft carpet, cloth or bubble-plastic. The best way to
stop small spots of glue getting stuck to the outside painted surfaces is to give the whole model
2 good coats of clear car wax first, but of course you must be sure to remove this 100% proper-
ly before adding any additional paint, decals or trim.
When sanding areas inside of the wing or stab to prepare for gluing something onto it, do NOT
sand right through the layer of lightweight glasscloth on the inside foam sandwich! It is only nec-
essary to rough up the surface, with 120 - 180 grit, and wipe off any dust with denatured alcohol
(or similar) before gluing to make a perfect joint. It is very important to prepare the inside of the
fuselage properly, by roughing up and cleaning the surface, before gluing any parts to it.
Don't use activator ('kicker') when applying CA glue to the lightweight foam sandwich structure
of the wing, stabs and fin, or the fibreglass skin of the fuselage, as it can cause the glue to get
hot, and could cause a blemish on the outer painted surface.
Make sure that all bulkheads and parts that you glue into the fuselage are a loose fit (1 - 2mm
gap all around) and glue them in with a mixture of slow epoxy and micro-balloons - otherwise
you may be able to see a mark on the outside of the fuselage.
Be very careful not to add any uneccessary weight in the nose area (EDF version Spark), other-
wise you may need to add lead in the tail to set the Centre of Gravity correctly.
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