Bill Hempel 42% Extra 260, Руководство пользователя

Страница: 23 / 31

23
The cowling is large enough to allow standard mufflers to fit inside
the cowl with only the down pipes exiting the bottom of the
cowling. Use cardboard or card stock to make a template for the
muffler openings. Once the template is made; remove the mufflers
from the engine, install the cowling, and then use the template to
mark the openings on the cowl. Remove the cowl and use a rotary
tool with a sanding drum to make the openings for the muffler
exits. A similar template can be made for marking the openings
for the choke lever and a hole for making needle valve
adjustments.
If a quieter exhaust system is needed: the Extra is equipped with an
exhaust tunnel in the fuselage that will allow mounting of canisters
mufflers or tuned pipes.
The bottom half of the cowl is secured to the fuselage by two tabs
that are built into the bottom of the firewall and one screw located
on each side. Secure the top half of the cowl to the bottom half by
installing 6 screws on each side of the cowl. Three additional
screws attach to the top half of the cowl from inside the fuselage.
Apply blue thread locker to all of these screws.