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Construction Manual
www.oldschoolmodels.com
Page 17
Step 127 - Power system
Installing your power system of
choice is up next. The photo
shown here is for a 20cc gas
installation. Note that this
is only a suggestion as
your power system will
likely vary from what’s
shown here.
Gas/Glow power
The engine mounts so the
crankshaft is positioned
on the thrust line, as
shown on the plans. Holes
will also need be drilled
for the throttle pushrod,
fuel lines (and ignition
pickup wire if gas) to pass through into the fuselage.
Electric power
If choosing electric power, the motor should mount with it’s shaft
on the thrust line as shown on the plans.
A few cooling holes will need to be cut into the firewall as they are
needed for internal battery cooling. Exit holes further back of the
fuselage also need to be cut.
Power batteries are mounted to the TRAY and the ESC can be
mounted below the tray.
Both the ESC and battery should be held in place with more self-
adhesive hook-and-loop.
We mentioned this earlier, but it bears repeating. Our engine size
recommendation range is a 20cc gas, .90-1.50 glow or an electric
motor with similar power output. Remember that the Robinhood
80 is a fun-scale model that is intended to fly at scale-like speeds,
so prudent throttle management should be practiced. While this
kit has been flight tested to exceed normal use, if this model will
be used for extremely high stress flying, such as racing, or if a
power system larger than one in the recommended range is used,
the modeler is responsible for taking steps to reinforce the high
stress points and/or substituting hardware more suitable for the
increased stress.
Step 128 - Covering
Now it is time to cover the Robinhood 80. Remove the powerplant,
main gear, the 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 rear of the fuselage. We choose to add a
length of 1/4” square balsa scrap about an 1” in front of the TW1
(underside of fuse). This creates a smaller area where the covering
can be cut away for a vent.
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.
Step 129 - Attach the Control Surfaces
Now is the time to attach all the control surfaces to the airframe, by
gluing the hinges in position.
Step 130 - Attach wheels.
Use the included wheel collars
to hold each wheel (not included) on the axles (one on each side
of the wheel). 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.
Step 131 - Attach hatches.
Place the top hatch in position and
using the pre-cut holes as a guide, drill the two screw holes into the
firewall using a sing a 1/16” bit.
Using the same bit, attach the bottom hatch to using the same
technique.
Both hatches are held in place with 2-56 x 3/4” self tapping screws.
Step 132 - Windows.
Finishing the assembly of the RH80 are
the windows. On the fuselage plans we have included a template for
the side windows and the front windscreen. Cut the windows from
the included plastic sheet, making sure to cut it slightly oversize
then trim as necessary. Attach each window to the fuselage with
canopy glue, or you can use number of small screws (not included)
evenly spaced around the window perimeters, if you’d like to make
the windows removable.
This completes the assembly of the Robinhood 80. Now you’ll
need to adjust the control throws and check for balance.
Step 132 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 RH80
is measured back 4-1/4” from the leading edge of the wing, and
you’ll see this marked on the fuselage plan with this symbol.
If necessary, move the battery, receiver, and/or add weight to
Create this vent area on
the underside.
Содержание Robin Hood 80
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