Top Flite Sierra 40 Trainer Kit - Manual (Page 28)

28
MOUNT THE ENGINE
See the ENGINE AND MOUNT SELECTION section
on page 5 for additional information.
THIS PHOTO SHOWS THE INSTALLATION OF AN
OS .40 FP ON THE SUPPLIED MOUNT.
THIS PHOTO SHOWS THE INSTALLATION OF AN
OS .48 SURPASS ON A DAVE BROWN 60 FS
MOUNT. THIS MOUNT MAY BE PURCHASED
FROM YOUR HOBBY DEALER. IT MAY BE
DRILLEDTOINSTALLTRICYCLE LANDING GEAR.
THE FOLLOWING SEQUENCE SHOWS THE IN-
STALLATION OF AN IRVINE 40 ON THE SUP-
PLIED MOUNT.
NOTE: The assembly and installation of the fuel
tank and fuel lines is covered on page 36-37. You
may assemble and trial fit your tank while
installing the engine.
1. Study the different drawings on the fuselage
plans that show engine installations. Find the one
that matches your installation closest.
2. You should already have determined if you
need to use the 9mm spacer plate during fuselage
construction. Use it as required.
NOTE: If the engine mount supplied in the kit
does not appear to fit your engine (example OS
40 SF), you may have to file the corners of the
engine mount rails to make room for the
crankcase. (See sketch and photo.)
File corners of
rails to fit your
Flat File MM40
Mount
engine
File Corner
3. To determine the best fore and aft position of
your engine on the engine mount, install the spinner
on the engine. Using the plans as referance, place
the engine on the engine mount so that the spinner
is the same distance from the fuselage. Mark the
location of the mounting bolts and drill the holes with
a 7/64" (or #36) drill. NOTE: If you have access to a
drill press, use it for drilling these holes to insure they
are drilled vertically (See previous photo).
4. Mount the engine with the four #6 x 3/4" sheet
metal screws. (An alternate method is to drill the
holes with a #43 drill, tap them 4-40, then mount the
engine with 4-40 x 3/4" socket head cap bolts, not
included).
5. Remove the muffler and needle valve (if
necessary) from the engine. Bolt the engine and
mount to the fuselage. Determine if any cutouts are
necessary for the needle valve or muffler (see the
photos for ideas). Mark any cutouts that are re-
quired.
NOTE: It is best to remove the engine before
cutting out clearance holes, but at least plug the
carburetor intake and the exhaust output port
before making dust.