Quickie Q2 Lite, Construction Manual

Page: 64 / 299

it is too easy for the homebuilder to get the part too hot and ruin
the part. The foam is damaged above 240°F. If you want to use these
heat sources, do so by applying the heat very slowly and checking the
temperature often by placing your hand on the surface. If you can
hold your hand on the surface five seconds without pain, the
temperature is okay-three seconds is too hot.
AIRCRAFT MEASUREMENT REFERENCE SYSTEM
..... To ease the engineer's task of defining where things go in these
odd-shaped gadgets called aircraft, a fairly standard system of
references has been developed. Fortunately the Q2 is so simple that
an elaborate measurement system is not necessary. It is, however,
convenient to use the standard terminology for reference occasionally
and you should be familiar with its meaning.
..... The three basic references are called butt, lines, fuselage
stations, and water lines. Don't blame us for the absurd names, we
didn't set the system up. All three are given in inches from some
arbitrarily chosen reference, so, fuselage station 100 is found 100
inches away from fuselage station 0, and similarly for butt lines and
waterlines. Being as lazy as anybody else, we abbreviate these as FS,
BL, and WL.
..... Fuselage stations (FS) are used to define the location fore and
aft on an airplane. To make things easy, fuselage station a is
generally located near the nose of an airplane and measurements are
made aft. Fuselage stations are the most commonly used of the
references and later on you will make a reference mark on your
airplane to use as a permanent FS reference point.
..... Waterlines (WL) are used to define vertical locations. Waterline
0 is generally found near the ground and measurements are made up
from WL0.
..... Waterlines are utilized in many places to position components or
templates relative to each other by leveling reference waterlines
with a carpenters level.
..... Butt lines define positions inboard and outboard. Butt line 0 is
the vertical centerline of the airplane and measurements are taken to
the left and right of BL O. Since left and right depends on which way
you are facing, it is standard practice to define left and right as
the pilot would while seated in the cockpit.
..... Using these three references, any point in an airplane can be
described with a fuselage station, butt line, and waterline.
Fortunately, your Q2 is so simple that we don't need to locate very
many things this way. When you start on your 4/5 scale replica of a
B-1 Bomber, this reference system will be real handy.
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