Great Planes Old Timer 40 Kit - GPMA0495 - Manual (Page 5)

• There are two types of screws used in this kit:
Sheet metal screws are designated by a number and
a length.
For example #6 x 3/4"
This is a number six screw that is 3/4" long.
Machine screws are designated by a number, threads per
inch, and a length.
For example 4-40 x 3/4"
This is a number four screw that is 3/4" long with forty
threads per inch.
• When you see the term test fit in the instructions, it
means that you should first position the part on the
assembly without using any glue, then slightly modify or
custom fit the part as necessary for the best fit.
• Whenever the term glue is written you should rely upon
your experience to decide what type of glue to use. When a
specific type of adhesive works best for that step, the
instructions will make a recommendation.
• Whenever just epoxy is specified you may use either
30-minute (or 45-minute) epoxy or 6-minute epoxy. When
30-minute epoxy is specified it is highly recommended that
you use only 30-minute (or 45-minute) epoxy, because you
will need the working time and/or the additional strength.
• Photos and sketches are placed before the step they
refer to. Frequently you can study photos in following steps
to get another view of the same parts.
• Not all die-cut parts have a name, or their complete
name stamped on them, so refer to the die patterns on
pages 6 and 7 for identification. When it’s time to remove the
parts from their die sheets, if they are difficult to remove, do
not force them out. Instead, use a sharp #11 blade to
carefully cut the part from the sheet, then lightly sand the
edges to remove any slivers or irregularities. Save some of
the larger scraps of wood.
• The easiest way to cut balsa sticks is with a single-edge
razor blade or razor saw. Position the stick over the plan,
mark its size, then cut the part on a piece of scrap wood. A
modeling miter box works well for cutting square corners
and 45° gussets.
Fuse = Fuselage
Stab = Horizontal Stabilizer
Fin = Vertical Fin
LE = Leading Edge
TE = Trailing Edge
LG = Landing Gear
Ply = Plywood
" = Inches
Types of Wood
Common Abbreviations
IMPORTANT BUILDING NOTES
5