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                  Construction Manual 

www.oldschoolmodels.com 

Page 9

Step 55 - Fuselage Assembly (F2 installation)

Locate F2 from LP4. Test fit this piece 

in position, noting that it will slope 

downwards when fitted correctly (to 

give downthrust). Lightly sand as 

needed, then glue this in position.

As this piece will hold your motor/

engine in position, make sure that it 

is throughly glued in position. You 

might also think of using epoxy for 

this step, rather than CA. Either will 

work, but epoxy will give a stronger bond.

Step 56 - Fuselage Assembly (F1 installation)

Locate F1 from LP4 and glue it in position, 

laminating it to F2 from the previous step. 

Again, epoxy could be used here for a 

stronger bond.

Step 57 - Fuselage Assembly (F10 exit)

Locate F10 from BP7. 

Position it on the top, 

rear of the fuselage sides, 

making sure to properly 

line it up with the sides 

for a clean, flush fit. It also 

butts up against F9.

Step 58 - Fuselage Assembly (Install rear stringers)

Using the five 1/8” x 

1/8” x 36” balsa sticks, 

measure, cut and glue 

the rear stringers that 

run between F5 and 

F8. Note that these 

stringers will butt up 

against the F10 block 

installed in the previous step.

Step 59 - Fuselage Assembly (install front stringers)

VERY IMPORTANT

 

- In 

order to have the proper 

lengths of 1/8” square 

needed to form the hatch 

in the upcoming steps, it is 

very important to cut only 1 

front stringer from each of 

leftover 1/8” strips. If you 

cut two, you won’t have 

enough left for the hatch.

Using the leftover 1/8” x 1/8” balsa from the previous step, 

measure, cut and glue the front stringers that run between F4 and 

F3. 

Step 60 - Fuselage Assembly (Hatch assembly)

The hatch is assembled 

in place on the fuselage. 

Care must be taken to 

position smaller pieces of 

waxed paper to make sure 

the hatch won’t be glued 

to the fuselage.

Locate H1, H2, and H3 

from LP4. Cut two of the 

leftover 1/8” x 1/8” balsa strips to span 

between F3 and F2 while resting on the 

fuselage sides. Position H1 up against the 

back of F2, resting on both of the 1/8” 

square strips. Now position H3 against 

the front of F3, again, resting on the 1/8” 

strips. When satisfied that everything is 

properly positioned and lined up, glue these pieces together.

Once cured, slip H2 in position so that it’s roughly midway between 

H1 and H3. Glue H2 in position.

Now cut the remaining three 1/8” square strips to length and glue 

them in position to finish the hatch’s shell. When the glue cures, the 

hatch should be able to be lifted away from the fuselage.

Step 61 - Fuselage Assembly (Hatch magnets)

You will need four the 1/4” dia. magnets as these are used to hold 

the hatch in position. One is pressed and glued into the pre-cut 

circle on F3, and one into F2, and the other two are installed in the 

hatch (H1 and H3). Makes sure the magnets are oriented properly 

to attract, not repel each other.

Step 62 - Fuselage Assembly (TW2 installation.)

Locate both TW2s from LP3. 

These are glued together, 

then glued in place, aft of 

F9. Make sure to line up 

the TW2 assembly to be 

between the sides and inline 

with the bottom edges.

Step 63 - Fuselage Assembly (TW1 installation.)

Locate TW1 from LP3. This piece 

is glued to the bottom of the 

fuselage as shown here. It should 

line up just aft of F9, and be flush 

with the fuselage sides.

 

Step 64 - Fuselage Assembly (LG1 and LG2 installation)

Locate LG1 from 

LP3 and the LG2’s 

from LP1 and LP3 (4 

total).

These pieces will be 

installed in the fuselage one at a time and laminate together to 

Summary of Contents for Sky Ranger 40

Page 1: ...irst class 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 mus...

Page 2: ...strips 4 pieces 1 4 x 1 4 x 36 balsa strips 3 pieces 3 16 x 3 16 36 balsa strips 4 pieces 1 8 x 1 8 x 36 balsa strips 5 pieces 5 16 x 1 1 4 x 36 tapered balsa strips 2 pieces 3 16 x 3 8 x 36 basswood strips 4 pieces 1 1 4 x 6 wooden dowel Hardware parts included in this kit 2 pre bent landing gear C A type hinges for control surfaces 4 control horns 4 wheel collars 3 16 I D 2 wheel collars 3 32 I ...

Page 3: ... 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 sr40 Let s begin construction by working on the right starboard wing of your Sky Ranger 40 Prepare your work area You ll need a flat building surface that is a minimum of 36 long Position the righ...

Page 4: ... R2 Locate two of the WB1s from BP6 and one R2 from LP1 Note that the WB1s have a slight angle on one end and there is a small circle engraved This angled side should face the inner root rib with angle tapering upwards circle on top Fit and glue both of these to R2 then glue that assembly to the spar Step 10 Wing Assembly WH1 assembly Locate one WH1 and two R1As from LP1 The two R1As fit into the ...

Page 5: ...ng Assembly sheeting Using a bit of the leftover sheeting from the BP6 sheets measure cut and glue together the sheeting to cover the area between R1 and R2 When measuring make sure that the grain is crosswise flowing from R1 to R2 Also measure so the sheeting extends about 1 16 past R2 When edge gluing the sheeting pieces together first make sure the edges are flat give a quick swipe or two with ...

Page 6: ...the 1 16th x 1 4 x 36 balsa strips Also cut and glue a cap to the horizontal balsa strip glued behind the servo mount in step 24 Step 29 Wing Assembly cut holes for servo wires On the plans you ll see a callout suggesting a spot where a hole needs to be cut in the top sheeting This hole allows the aileron servo wires to pass through the sheeting and exit the wing Make these roughly 1 2 to 3 4 inch...

Page 7: ...f the string so they won t easily pull out Do the same for the right panel Step 36 Cut and hinge the ailerons Measure and cut the correct length and shape for each 5 16 x 1 1 4 x 36 strip to make the ailerons Round the leading edge of both ailerons When finished shaping make the necessary slots holes needed to hinge the ailerons to each side of the wing We recommend 4 hinges per aileron Step 37 Ai...

Page 8: ...e left side to the fuselage Trial fit this next step before applying any glue as there are a lot of tabs that have to properly fit into the fuselage side If using C A use a medium or thick formulation to give you time to fit everything together When the left side is fitted hold it in position or place a couple of weights on it until the glue fully cures When cured remove the fuselage from the boar...

Page 9: ...h assembly The hatch is assembled in place on the fuselage Care must be taken to position smaller pieces of waxed paper to make sure the hatch won t be glued to the fuselage Locate H1 H2 and H3 from LP4 Cut two of the leftover 1 8 x 1 8 balsa strips to span between F3 and F2 while resting on the fuselage sides Position H1 up against the back of F2 resting on both of the 1 8 square strips Now posit...

Page 10: ...h pieces It s much easier to do this now than to try it after they re installed Step 73 Fuselage Assembly Stab alignment Although we ve done everything possible to engineer the Sky Ranger 40 so it will form a sturdy block for the landing gear wire Slide one of the LG2 pieces into the pre cut slots on the fuselage sides Now paying close attention to the orientation of LG2 holes begin sliding the re...

Page 11: ...od around this area with a bit of thin C A You ll also need to cut a small groove into the leading edge of the rudder This will allow the tailwheel wire to rest flush with the leading edge of the rudder Step 77 Elevator relief Using 4 of the C A hinges dry fit the elevator to the stab Mark and trim the area where the leading edge of the elevator rubs against the tailwheel s axle Test the elevator ...

Page 12: ...ill need be drilled to allow the wires to pass through into the fuselage Also a few cooling holes are needed for internal battery cooling The ESC mounts underneath the TR1 battery tray and the motor s power battery mounts to the tray Both the ESC and battery are held in place with more self adhesive hook and loop Glow power The engine mounts so the crankshaft is positioned at the center of the fir...

Page 13: ...ws The amount of control throw should be adjusted as closely as possible using mechanical means rather than making large changes electronically at the radio By moving the position of the clevis at the control horn toward the outermost hole you will decrease the amount of control throw of the control surface Moving it toward the control surface will increase the amount of throw Moving the pushrod w...

Page 14: ... accepts all resulting liability Limit of Liability In the use of this product our only obligation shall be to replace such quantity of the product proven to be defective The user shall determine the suitability of the product for his or her intended use and shall assume all risk and liability in connection therewith If the buyer is not prepared to accept the liability associated with the use of t...

Page 15: ...Construction Manual www oldschoolmodels com Page 15 APPENDIX A ...

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