Installing The Engine And Radiator - Model Airways CURTISS JN-4D JENNY Instruction Manual

of the manifolds. This pin is for the flex air
heater tubing between the exhaust manifold
and carburetor. Since the manifold casting is
identical for both sides, cut the top pin off
each casting. Do not install the flex tubing at
this time. It must be installed after the
engine is mounted in the fuselage.
To make the manifolds look more realistic,
grind out the exhaust exit deeper and the
wall thinner. The manifolds are actually
sheet metal. Paint the ground out area black
so you cannot see the limited depth.
Ignition wiring (Figure 5-13):
engine, the wiring from the spark plugs to the
distributor block feeds through fiber wiring
harness tubing strapped to the intake mani-
folds. For the model, these tubes are made
from a 1/16"-diameter wood dowel, so paint
them a light brown to look like a fiber tube.
Drill holes into the dowel where wires will
be fitted. Then, strap the dowels to the intake
manifolds with strips of self-adhesive copper
tape. Finally, install the wiring using the flex-
ible wire provided. First, glue the wires to
the top of the spark plugs and into the holes
you drilled in the dowels. The four wires on
each side exit the dowel from holes or a slot.
Glue them in the slot. To attach the wires
to the distributor block, drill holes in the
block (you were cautioned to do this before
installing the magneto earlier). Another
option to drilling holes, glue the wires in
bunches directly to the block. Just forward
of the distributor block, the wires on the real
aircraft are seized together with a small clip.
On the model they can be tied together with
thread, tape, or wire, or omitted.
Note:
The jacket on the flexible wire supplied
in the kit may be white instead of black
(depends on availability). If white, paint the
wire black using matte acrylic paint. Also, the
wire may be two strands molded together.
Simply strip the two apart for the single wire.

3. Installing the Engine and Radiator

Important:
Install the engine on the engine
bearers before installing the radiator.
Glue or pin the engine to the engine bearers
in the location shown on the plan. Actually,
the location is pretty much set because the
transverse beam supporting the aft end of the
engine bearers fits between the V intake mani-
fold and the water pump of the engine. Once
set in this location, the engine cannot move
(Figure 5-14)
forward or aft very much
Glue the photo-
Radiator (Figure 5-15):
etched radiator grill (E9B) in the front of the
radiator frame casting (E9A). The hole in the
center of the grill and the edges have some
excess material. It will therefore be necessary
to cut or file these areas so they fit the radia-
tor casting ledges. Then, install the radiator
on the front of the fuselage. It sits on the
tabs of the fuselage nose plate that have been
bent forward.
Secure the upper end with a 1/16" basswood
strut on each side of the fuselage. These struts
are shown on the fuselage plan. The struts
EXHAUST MANIFOLD
E43 (BOTH SIDES)
On the real
BOTTOM PIN USED TO SECURE FLEX
TUBE TO CARBURETOR – INSTALL
FLEX TUBE AFTER ENGINE IS IN MODEL
1/16" WOOD DOWEL
WIRING TUBE –
PAINT LIGHT BROWN
TO FAKE A FIBER TUBE
SECURE TO MANIFOLD
WITH COPPER TAPE
PIN OR GLUE FEET
TO BEARERS
RADIATOR FRAME
CASTING E9A
.
PHOTO-ETCHED GRILL E9B
FIG. 5-12 INSTALLING EXHAUST MANIFOLDS
CUT OFF THIS TOP
PIN (BOTH SIDES)
SEE FIG. 5-19
FIG. 5-13 IGNITION WIRING
DRILL HOLES IN DOWEL FOR WIRES
FIG. 5-14 ENGINE INSTALLATION
FIG. 5-15 RADIATOR ASSEMBLY
SIT AND GLUE
CORNERS
ON BENT TAB
28
REAR LEFT CYLINDER
OUTER HOLE AT
TOP OF CYLINDERS
GRIND OUT FOR MORE
REALISTIC LOOK – PAINT
INSIDE FLAT BLACK
TIE RIGHT AND LEFT WIRE
GROUPS WITH THREAD,
WIRE, OR TAPE
DISTRIBUTOR BLOCK
ON MAGNETO
DRILL HOLES
IN DISTRIBUTOR
BLOCK FOR
WIRES, OR
GANG AND
GLUE
DOWEL
ENGINE
BEARERS
WATER PUMP
SUPPORT BEAM
AT STATION 3
V INTAKE
MANIFOLD
GLUE TO RABBET
CUT IN STRUT
1/16" SQUARE
STRUT
(OTHER SIDE
BENT TAB ON
SIMILAR)
NOSE PLATE