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Construction Manual

Step 44 - Fuselage Assembly (prepare for left side build)

As mentioned before, 

the left side is built on 

top of the right side 

you’ve just assembled. 

To do this, make sure 

that all that make up 

the left side pieces 

will be able to lay flat 

against the assembled 

right side. This might mean removing pins that held some of the 

right side pieces to the building board. Typically this can be done 

quite easily and the pieces will still be held in place by the already 

cured glue.

You should have several leftover pieces of the 1/4”square strip and 

1/4” x 1/2” strip laying around. Place several of these on top of 

FRS as shown in the photo. These will be the spacers necessary to 

locate FLS properly, 1/4” above FRS.

Also, cut a sheet of waxed paper to cover the right side and place it 

in position. This will protect the right side as you build the left side.

Step 45 - Fuselage Assembly (FLS)

Building the left side 

starts by locating FLS 

from sheet LP3. Pin 

FLS in position over 

the plans, but do not 

pin through the wood. 

Instead, use a few pins 

around the outside of 

FLS as shown in the 

photo. Note that FLS is 

slightly longer than FRS around the firewall, to build in a bit of right 

thrust. Because of this, to properly line up FLS, use the window 

cutouts and the rear portion as reference.

Step 46 - Fuselage Assembly (top longeron)

Measure and cut the top longeron from 1/4” square strip. Pin in 

position and glue to FLS.

Step 47 - Fuselage Assembly (bottom longeron)

Take a complete 1/4” square strip and begin to pin in place to form 

the bottom longeron. Again, this piece is curved and will require 

several pins along it’s length to hold in place. This piece ends at F3. 

Once in position, glue to FLS.

Step 48 - Fuselage Assembly (vertical supports)

Measure and cut the 

vertical support pieces 

from 1/4” square  strip, 

again using shorter 

lengths first. Take care 

to match the angles for 

a good fit. Pin these in 

position and glue into 

place.

Step 49 - Fuselage Assembly (stab support)

Measure and cut the horizontal support for the stab from 1/4” 

square strip. Pin in position and glue into place.

Step 50 - Fuselage Assembly (diagonal supports)

Measure and cut the diagonal support pieces from 1/4” square 

strip. Take care to match the angles for a good fit. Pin these in 

position and glue into place.

Step 51 - Fuselage Assembly (pushrod exit)

Once the glue has cured, 

remove the left side 

and flip it over. Locate 

the remaining two EXIT 

pieces from sheet BP2. 

Glue together, then pin 

in position and glue into 

place so it is flush against 

the left side. Remove two G gussets from BP3. Glue together to 

form a 1/4” thick piece. Glue in place. (Not shown for clarity.)

Step 52 - Fuselage Assembly (right side)

Place the right side of the fuselage back on your work surface, in 

the same position as it was when you assembled it.

Step 53 - Fuselage 

Assembly (F3 and LG1)

Locate F3 from sheet LP2 and 

LG1 from sheet LP1. You’ll 

see that the notched side of 

LG1 fits into the slots on the 

bottom of F3. This in turn will 

fit into the fuselage as shown 

on the plans. Also note that 

LG1 is slightly tapered, so when F3 and LG1 are glued in place, F3 

will not be perfectly vertical. When satisfied with the location and 

fit of these pieces, glue into place on FRS.

Step 54 - Fuselage Assembly (F4 and LG4)

Locate F4 and LG4 from sheet 

LP2. As in the previous step, 

LG4 fits into the notches on 

the bottom of F4, then into the 

fuselage as shown on the plans. 

When satisfied with the location 

and fit of these pieces, glue into 

place on FRS.

Step 55 - Fuselage Assembly (TF)

Locate TF from sheet LP2. 

You’ll notice a small circle 

engraved in the corner 

on the shorter end of the 

piece. This designates the 

front and right side of TF. 

Slip the tab in the rear of 

TF into the slot of F3, then 

the tabs in the right side of 

TF into the corresponding 

Summary of Contents for Robin Hood 25

Page 1: ...ss condition a correctly sized power system and components electronics batteries wheels etc throughout the building process You must correctly install all R C and other components so that the model operates correctly on the ground and in the air Installation shown in the manual is a suggestion You may have to adjust the mounting steps to accommodate the size of your radio equipment You must check ...

Page 2: ...lsa strips 10 pieces 1 4 x 1 2 x 36 balsa strips 1 piece 3 16 x 3 16 36 balsa strips 6 pieces 3 16 x 1 x 36 balsa strips 2 pieces 3 16 x 3 8 x 36 basswood strips 6 pieces 1 1 4 x 6 wooden dowel Hardware parts included in this kit 1 Pre bent landing gear front 1 Pre bent landing gear rear C A type hinges for control surfaces 4 control horns 4 wheel collars 1 8 I D 4 1 8 plastic landing gear straps ...

Page 3: ...e 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 enou...

Page 4: ...de into the holes in both R5 ribs then are glued into position Even if building as a 3 channel we advise installing these Step 12 Wing Assembly attach R3 Locate one R3 rib from BP3 and two WB2 sheer webs from BP4 Position R3 up against the ends of the WB3 pieces from step 10 Once located properly pin the rear tab to the board Lightly tack the R3 to the WB3 pieces Once the glue has set you will cut...

Page 5: ...Once ready the SMR is glued into place spanning the gap between the R5 ribs with the TC towards the inside of the wing Also add glue it to where SMR touches the lower sub spar for a bit of extra support Step 23 Wing Assembly sand R1 flush Take a bit of time to sand the inside edge of the R1 fib flush removing excess length of the spars sub spars leading and trailing edges Step 24 Wing Assembly rig...

Page 6: ...heets Glue one WH7 on top of WH6 on the left side of center making sure that the holes line up then one on the right Now glue a second WH6 on top of the first one on the left side then one on the right Step 30 Wing Assembly center sheeting Now the center sheeting is applied to the underside of the wing s center section Flip the wing so the bottom is facing up and apply the sheeting from the center...

Page 7: ...od 25 wing Now it s time to start construction of the fuselage Prepare your work area Now tape the fuselage side plan and a fresh piece of waxed paper on your building board Step 36 Fuselage Assembly The fuselage sides are made by first constructing the right side then building the left side on top of the right side Because of this you ll need to pay attention to where pins are used during the con...

Page 8: ...pport pieces from 1 4 square strip again using shorter lengths first Take care to match the angles for a good fit Pin these in position and glue into place Step 49 Fuselage Assembly stab support Measure and cut the horizontal support for the stab from 1 4 square strip Pin in position and glue into place Step 50 Fuselage Assembly diagonal supports Measure and cut the diagonal support pieces from 1 ...

Page 9: ...lage Assembly attach H2 or H2A Now is the time to make a choice Will you hold on the front hatch with a couple of screws or with magnets There s not a right or wrong answer and we ve included parts for either scenario If you re using screws locate both H2As from sheet LP1 If you re using magnets locate both H2s from sheet LP1 Whether you choose H2 or H2A they are installed the same way These are p...

Page 10: ... creating rear taper Work now moves to the rear of the fuselage to join the fuselage sides so they taper together To do this you ll need to sand away equal amounts of balsa on the insides of both sides Using a ruler and straight edge measure and draw the guides as shown in the photo 1 2 way on the verticals tapering in about 1 down the fuselage These marks will show exactly how much wood should be...

Page 11: ...and cut the stab s trailing edge from a piece of 1 4 x 1 2 strip Pin this in position Step 80 Stab Elevator S1 install Take the S1 assembly position and glue it in place Step 81 Stab Elevator S2 installs Take one of the S2 assemblies position and glue it in place on the left tip of the stab Then do the same with the other S2 on the right tip of the stab Step 82 Stab Elevator leading edge Measure a...

Page 12: ...and cut the rudder s trailing edge pieces from 1 4 x 1 4 strip Pin and glue in position Step 100 Rudder rudder ribs Measure and cut the rudder s internal ribs from a 1 4 square strip Take care to match the angles for a good fit Pin these in position and glue into place Step 101 Rudder Once the glue has set remove the finished rudder from the plans Step 101 Fuselage Assembly sanding tail pieces Als...

Page 13: ... down Glue one H3 in each of the two slots on the rear of the hatch making sure that the H3 pieces point towards the rear of the hatch as shown Test fit the hatch in place and gently sand the H3 pieces if necessary to give a solid slop free hold If you chose to use magnets glue those in place now If you chose screws fit the hatch in place then using the two pre cut holes in the front of the hatch ...

Page 14: ... carefully and tightly wrap this joint with wire as shown here using We used 26 gauge wire but other thicknesses can be used Starting on one side lightly brush on a bit of flux over the entire wire wrap then use a small torch or a soldering iron to securely older the wire wrap in position securing the front and rear landing gear wires into a solid one piece unit When finished do the same to the ot...

Page 15: ...s the time to attach all the control surfaces to the airframe by gluing the hinges in position attached to the outermost hole on each control horn Finish the installation of your radio gear by adding the receiver flight pack battery and the switch We mounted the receiver to the fuselage side using a bit of self adhesive hook and loop not included The flight pack battery is installed under the TF a...

Page 16: ...eiver pack for your airplane Use the recommended charger supplied with your particular radio system following the instructions provided with the radio In most cases the radio should be charged the night before going out flying Check the radio installation and make sure all the control surfaces are moving correctly i e the correct direction and with the recommended throws Test run the engine and ma...

Page 17: ...Construction Manual www oldschoolmodels com Page 17 APPENDIX A ...

Page 18: ...Page 18 www oldschoolmodels com Construction Manual ...

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