Engine Mount Assembly and
Installation (60-75 mins)
3.
r
Repeat step #2 to install the 2nd Thrust Ring.
(1) Again keep the Engine Mount Tube level or tilted
slightly back towards the forward end, us a cotton swab
stick to carefully run a bead of Wood glue around the
inside diameter of the tube just to the rear of the 1st
installed Thrust Ring. (2) Slip the 2nd Thrust Ring into
the tube and use a spent E-Size Rocket Motor or proper
sized dowel to push the ring down into the tube until it
hits the 1st installed thrust ring.
DO NOT ALLOW ANY
GLUE INTO THE
NO GLUE AREA
AS INDICATED IN
STEP #4!
2nd Thrust Ring
Glue
Bead
Engine Hook
Slot Opening
Froward
End
Rear
End
Push
down tube
1
2
4.
r
From the forward end run a fillet of Wood glue
around the 1st ring and tube interface. Stand tube
vertically on rear end allowing the glue to dry throughly
(10-15 min) before moving onto the next step.
DO NOT
ALLOW ANY GLUE INTO
ENGINE HOOK SLOT
OR
THE
NO GLUE AREA
AS INDICATED!
Run a glue fillet
inside tube around
Thrust Ring
No Glue
Area
Double
Thrust Ring
No Glue in
Engine Hook Slot
2.
r
(1) Keeping the Engine Mount Tube level or
tilted slightly back towards the forward end, us a cotton
swab stick to carefully run a bead of Wood glue around
the inside diameter of the tube just to the rear of the
Engine Hook slot. (2) Slip one of the two Thrust Rings
into the tube and use a spent E-Size Rocket Motor or
proper sized dowel to push the ring down into the tube
until it hits the edge of the Engine Hook slot opening.
DO NOT ALLOW ANY GLUE INTO THE
NO GLUE
AREA
AS INDICATED IN STEP #4!
Engine Hook
Slot Opening
Forward
End
Push
down tube
2
1st Thrust Ring
Glue
Bead
Rear
End
1
5
1.
r
Lightly sand the Engine Mount Tube end edges
(see figure) smooth using 220 grit sandpaper. Using a
pencil and a ruler mark the locations for the Engine
Hook and Rear Engine Mount Ring on the Engine
Mount Tube as shown. Also create an Engine Hook
guide line down the center of the Engine Mount Tube.
Cut a 1/8 inch wide by 1/2 inch long slot into the tube
starting at the Engine Hook location and moving forward
using a hobby knife as shown. This slot enables the
Engine Hook to be extended and retracted. By
retracting the Engine Hook the finished XP-RAPTOR
can be stood on it’s rear end.
Sand edge
smooth
Sand edge
smooth
Engine Hook 1/8" Slot
Engine Hook
guide mark
3
3
8
/"
1
/"
2
#2 Engine Mount
Ring mar
k
7
/"
16
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