Construction Manual
www.oldschoolmodels.com
Page 15
Covering
Now it is time to cover the Javelin. Remove the powerplant, main
gear, tailwheel, pushrods, and any other components that would
get in the way of applying the covering.
Double check that all surfaces are smooth and ready to cover. Sand
as necessary, then cover the entire airframe with the covering/finish
of your choice.
Note that if you’re powering with an electric motor, you’ll need
to make a hole for the cooling air to escape the bottom of the
fuselage, near the rear.
When the covering is complete, re-attach all the components you
removed earlier in this step.
Logos, numbers, etc.
If you want to use graphics similar to the ones we used, Old School
Model Works has teamed up with Callie Graphics as a supplier
for pre-cut vinyl. They are a very well known provider of custom
graphics for R/C models.
We have supplied them with the artwork needed to cut the correct
size logos. You can order straight from them, choosing the colors
that work for you.
Contact Callie Graphics at this link: https://callie-graphics.com or scan
the QR code on the previous page.
Note that Callie Graphics is not affiliated with Old School Model
Works, nor does Old School Model Works generate any income
from this partnership.
Attach the Control Surfaces
Now is the time to attach all the control surfaces to the airframe, by
gluing the hinges in position with thin C/A.
Make sure that you attach the elevator first, then the rudder. Also
note that the tailwheel assembly should be in place before the
rudder is attached.
Attach wheels
Use the included 5/32” i.d. wheel collars to hold each wheel (not
included) on the axles. For a maintenance free installation, file
a small flat on the axle where the set screw of the wheel collar
touches. Also use a touch of thread-locking compound to keep the
screw from loosening over time.
This completes the assembly of the Javelin. Now you’ll need
to adjust the control throws and check for balance.
Recommended C.G. setting:
An important part of preparing the aircraft for flight is properly
balancing the model. This is especially important because of the
various motor/battery combinations that can be used.
CAUTION! DO NOT SKIP THIS STEP!
The recommended Center of Gravity (CG) location for the Javelin
is measured back 4.1” from the leading edge of the wing, as
measured at the wing’s center section,
and you’ll see this marked on the fuselage
plan with this symbol.
If necessary, move the battery, receiver,
and/or add weight to either the nose
or the tail until the correct balance is
Glow power
Your engine
mounts so the
crankshaft is
positioned over
the center of the
circular cutout
on the firewall. It
can be mounted
upright, side or
even inverted.
We chose side
mounting it as shown here on one of our Javelin prototypes. This
particular engine required an muffler extension to space the muffler
away from interfering with the bottom of the fuselage.
Holes will also need be drilled for the throttle pushrod to pass
through into the fuselage.
Electric power
When mounting an electric motor, we have
provided a motor spacer box that can be
used. Note that it is not universal but has
worked with the motors we’ve tried.
This box consists of parts M1 from LP5 and
two MP3s, two MP4s and MP5 from LP6.
MP5 is the base as shown in this photo,
then the MP3s and MP4s make up the
sides, and M1 the top.
Before gluing these pieces together,
drill M1 to accept your motor’s
mounting bracket, then attach t-nuts
(not included) on the back side of M1.
When that’s worked out, you can then glue it all together, mount
your motor and then mount it to the firewall.
To mount to the firewall, drill four etched mounting locations on
F1, then attach it to the firewall using the included 4-40x1/2 bolts,
#4 washers and 4-40 t-nuts.
Cooling holes will need be
drilled through the firewall
as well and you’ll find
recommended locations for
those etched into F1 as well.
One last thing regarding
electric power. We’ve
included parts T3 and T4 in
LP6. These can be used to
create a slightly higher shelf
to mount you batteries. The idea is to raise up the tray level with
T2, so larger and longer batteries can be used. Also it allows the
batteries to be shifted aft if needed, for C.G. purposes.
Tailwheel mounting
Mount your choice of tailwheel to the bottom of the fuselage.
It should mount to the bottom of the plywood TW1 assembly,
already installed.
We chose to use a simple wire tailwheel that mounts into the
rudder. If going this route, make sure it’s in place before hinging
and mounting the rudder to the fuselage.
