Quickie Q2 Lite, Construction Manual

Page: 224 / 299

..... The fuel tank must be trimmed to fit your fuselage. Refer back
to the chapter on Basic Fuselage Assembly for a sketch showing the
fuel tank positioning. The leading edge of the fuel tank is nominally
at FS36.1; the trailing edge should be at about F558.1 in order to
provide a nominal 6 inches of clearance between the fuel tank and the
Seatback Bulkhead. You will find that the sides of the fuel tank need
to be trimmed back to allow the fuel tank to sit down against the
fuselage bottom. Verify that the elevator control rod C513 does not
interfere with the top of the main fuel tank as it runs forward to
the elevator by skipping ahead in this chapter. If it does, you must
trim down the height of the main fuel tank to clear by a minimum of
3/8", or laminate a slot into the fuel tank for this CS13 clearance.
..... Baffles are used to prevent excessive sloshing of the fuel
within the tank, as well as to increase the stiffness of the fuel
tank so that it may be stepped on during entry and exit from the
aircraft.
..... Three baffles are used; one spanwise baffle about 18" wide, and
two longitudinal baffles that extend from the landing edge of the
fuel tank to within 4 inches of the trailing edge of the fuel tank.
The sketches illustrate positioning and size. Note that openings are
left regularly along the baffles to allow fuel to move back and forth
slowly. Particularly note the opening at the top which is part of the
venting system. Those openings should be about 2 inches in length and
about 1" in height, and need not be accurately shaped.
..... The baffles are fitted using trial and error until they fit both
against the fuel tank and also against the fuselage bottom when the
tank is inserted into place. Each baffle should have 1 BID on each
side, and the 1/4" thick white foam is used for the core material.
Once each baffle is properly trimmed, it should be mounted
permanently to the fuel tank with micro and a BID tape on either side
with a minimum 1" lapping onto each surface. ,Upon installation of
the fuel tank permanently to the fuselage, these baffles will be
coated liberally with flox so that they bond to the fuselage bottom.
PAGE 14-3
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Q2 Plans - Chapter 14 - Page 14-04