Construction Manual
www.oldschoolmodels.com
Page 3
• Pencil or pen
• Ruler
• String (18” length)
• T-Pins
• Waxed paper
• Building board
• 6 and 30 minute epoxy
• Adhesives of your choice. We recommend thin and medium
CA (cyanoacrylate) viscosities
• Epoxy brushes and mixing sticks
• Threadlocking compound
• Torch or soldering iron, solder and flux
• Canopy glue
Before Starting Assembly
Closely inspect the supplied laser cut parts for damage. If you find
any damaged or missing parts, contact us immediately.
When removing the laser cut parts from their sheets, you’ll notice
the parts are held in place by several small “tabs”. These tabs
are uncut pieces of wood and can sometimes make it difficult to
remove a part. Rather than breaking and/or splintering the wood
by forcing out the part, we recommend removing any laser cut
parts from their sheets by using a hobby knife with a new, sharp
blade. A quick cut of the tab will allow the piece to be removed
with no damage. Sand any tab remainders flush with the part so
there will be no problem aligning them later.
It’s best to not remove parts from their sheets until they are needed.
Refer to Appendix A of this manual as a reference to what all the
laser cut parts look like and are called.
For each step, we highly recommend that you dry fit the parts in
each step first. Lightly sand as needed to ensure a good fit. Once
you’re satisfied with the fit, then and only then, glue the parts in
position.
IT IS VERY IMPORTANT THAT YOU ASSEMBLE THIS
ROBINHOOD 25 KIT IN THE ORDER DESCRIBED. SKIPPING
FORWARD IN THE STEPS COULD LEAVE YOU WITHOUT THE
PROPER LENGTHS OF WOOD TO FINISH THE KIT.
WE’VE INCLUDED ENOUGH WOOD TO EASILY COMPLETE
THIS KIT, BUT YOU MUST TAKE CARE TO PROPERLY
MEASURE AND NOT WASTE WOOD WHEN CUTTING.
Closely inspect the supplied laser cut parts for damage. If you find
any damaged or missing parts, contact us immediately.
Online Supplementary Photos
We realize that the smaller black-and-
white photos in this manual might not
show some of the steps as clearly as
you might want. So we’ve anticipated
this and made these photos available
on our website. You can either scan the
QR code or type this address into your
browser:
www.oldschoolmodels.com/mpics/rh25
Let’s begin construction by working on the left (port) wing of
your Robinhood 25.
Prepare your work area
You’ll need a flat building surface that is a minimum of 36” long.
Position the left wing plan over the surface and tape into position.
Tear off a length of waxed paper long enough to cover the left
wing plan and tape that into position, over the plan.
Step 1 - Alignment triangles
Pre-cut into LP3 are two triangles,
one inside the other. These can be
used to vertically align any of the
parts in the construction of your
Robinhood 25. LP3 also includes
two foot pieces that can be used
with the triangles to hold both
triangles vertical hands-free.
We recommend using the smaller triangle in the wing construction
as it’s small enough to fit between the ribs.
Step 2 - Wing Assembly (outer wing tip)
The wing panels are constructed
from the outside (tips), in towards
the center (root). Remove parts
T1, T2, T3, R6 and R7 from one
of the BP1 sheets. Slide T1, T2,
& T3 in place on R7 to make the
R7 assembly. Then, position R6 as
shown here and gently push the R7
assembly into place. Note that the positioning of R6 is important
as you will make a left and a right side. Once satisfied with the fit,
glue everything in place.
Step 3 - Wing Assembly (cut & drill lower spar)
The lower spar is a one of the 3/16 x 3/8”basswood strips. Position
over the plan, measure the length and cut, leaving an extra 1/2” or
so past the R1 position.
Step 4 - Wing Assembly (drill lower spar)
Measure, mark and drill the
1/8” hole into the lower spar,
as shown on the plans. Tap
in a 4-40 t-nut firmly into this
hole and then capture the nut
in place by gluing one TC from
BP4. The hole in TC should be centered over the hole in the t-nut,
and the edges of TC should align with the edges of the spar. Make
sure to keep the glue out of the threads of the t-nut.
Step 5 - Wing Assembly (position lower spar)
Making sure that the TC is
facing upwards, attach the
spar over the plans, using
a couple small drops of
medium CA instead of
t-pins. Be sure it is aligned properly and is straight over it’s entire
length. The alignment of this spar is critical as the rest of the wing
panel is based off this single piece.
