C
A
G
LU
E
1”
Apply CA and smear to
coat inside of tube
22.
r
Soak approximately 1“ of the inside surface of
the forward end of the Upper Main Body Tube with CA.
Use a finger wrapped in a plastic bag to smear CA
evenly. Let dry and repeat process. After the CA has
dried, sand the inner surface smooth with sandpaper
220 grit or finer.
CAUTION: USE ADEQUATE VENTILATION FOR
THIS STEP, SINCE THE CA GIVES OFF FUMES
WHICH IRRITATE EYES AND LUNGS.
23.
r
Test fit the Nose Cone into the top of the
Upper Main Body Tube. Lightly sand as needed with
220 grit sandpaper to ensure a slip fit. A good test
DO NOT OVER SAND OR SAND SHOULDER
LIP !!!
is to
hold the rocket nose-down. The Nose Cone should
remain in place, but should come loose with a solid
shake.
26.
r
The XP-RAPTOR has been designed to
produce a Center of Gravity (CG) 6.75 to 7.75 inches
from the Primary Fins as illustrated. Test the CG by
temporarily placing the parachute, heat shield, and snap
swivel into the parachute compartment. Temporarily
install a E9-6 engine and attached the Nose Cone. F
.
ind
the point where the rocket balances
I
f the CG is too far
back (tail-heavy), add weight to the nose using molding
clay or epoxy. If the CG is too far forward (nose-
heavy), reduce the weight of the Nose Cone by sanding
it or adding weight to the tail (engine tube recess area).
Add or reduce nose
or tail weight as needed
6.75 - 7.75“
Center Gravity
Place parachute, heat shield
and, snap-swivel in parachute
compartment.
15
Making a D-Engine Spacer
1.
r
Take both a spent D-Engine and E-Engine and
set them side-by-side ejection charge end up. Using a
pencil mark the height of the D-Engine onto the E-
Engine as shown.
2.
r
Using a razor saw cut the E-Engine at the mark
to produce the spacer.
3.
r
Sand edges and body of the spacer. Test fit into
Engine Mount Tube. Spacer should be loose for easy
insertion and retraction.
Mark Spacer
on E-Engine
Sand edges
and body
Cut off Spacer
using razor saw
D
-E
n
g
in
e
E
-E
n
g
in
e
E-Engine
Test fit Nose Cone
into Main Body Tube
Sand lightly
as needed
