09/11/2018
RANS S-21 OUTBOUND
TEXT MANUAL
11-8
CAUTION:
Damage may result from over-pressurization. While the tank is
pressurized, check for any leaks by spraying a soap/water mixture onto
the tank and around the fittings. To cap off the fittings use a 1" segment of
fuel line with a bolt inserted, and fuel line clamps or similar. An alternate
test is to fill the tank with water and let it sit for approximately 48 hours.
7.
Modify Header Tank Mount Channel per
FIGURE 11B-08/912
. Position Header
Tank flush with front of Mount. Use large hose clamps to secure tank to mount.
NOTE:
Modified Mount Channel will position under hose clamps, on top of
tank, and be positioned so that Channel ends are flush with sides of
header tank.
LOCATING HEADER TANK SUMP VALVE HOLE THROUGH BELLY
SKIN
1.
Mark on the outside of the tank on each side next to the sump valve as per
FIGURE
11B-02/912
. This allows location of the hole through belly skin with the
tank installed.
2.
Set the header tank in place. Transfer the marks on the tank to the belly skin.
Remove the tank and project the marked lines at 90° to the sides of the tank until
they intersect.
3.
Drill a #40 in the skin at the intersection. Set the header tank securely in place.
Drill #30 through the hole in the skin and the header tank. Use a step drill or
several sizes of drill bits to work up to the required size hole for the sump drain
fitting.
FUEL VALVE INSTALLATION
1.
Install two fittings to the fuel valve using thread sealant. Refer to
FIGURE 11B-
09/912
and the parts manual.
2.
Remove the handle from the fuel valve and install the valve to the two tabs of the
fuselage steel frame.
Use the mount brackets as shown in
FIGURE 11B-09/912
.
Re-install the handle to the fuel valve.
NOTE:
Valve should be "ON" when valve handle is AFT and "OFF" when
valve handle is UP.
3.
Install the bulkhead fittings in the pre-cut holes on the lower left side of the
firewall. Use the hardware shown in the parts manual.
4.
If installing the OPTIONAL ELECTRIC FUEL PUMP do so at this time.
5.
Fabricate and install a fuel hose assembly from the bulkhead fitting in the firewall
to the fuel valve and from the fuel valve to the header tank fitting. Secure as
desired using plastic ties. Add a clear plastic tape or split fuel hose as anti-chafe
wherever the lines contact the fuselage frame or other parts.
