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Page 12 

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Construction Manual

Step 62 - Fuselage Assembly (wing attachment bolts)

Slide the wing into the wing 

saddle and push the rear hold 

down pins into WH4 (lightly sand 

as necessary for a good fit).

Then allow the wing to rest in 

the wing saddle. The wing is 

perfectly aligned when the distance 

from the left wing tip to the rear of the 

fuselage is the same the distance when 

measured from the right wing tip.

When the wing is aligned, use a pencil to transfer the wing’s bolt 

holes through to WH1/WH2 already installed in the fuselage.

Remove the wing then drill two 3/16” holes, centered on the marks 

you just made. When drilling, take your time and make sure the 

drill is held so the bit is held straight. 

Remove the drill, and clean up around 

the new holes you drilled.

Run a 1/4x20 tap through holes you 

just drilled so that the wing bolts will 

thread into this block. A few drops 

of thin CA will help strengthen and 

secure the threads you’ve cut.

But, if you prefer, you can enlarge these 

holes to 5/16”, then install 1/4x20 t-nuts instead (not included).

Step 63 - Fuselage Assembly (stab alignment)

Although we’ve done everything possible to engineer the Mambo 

so it will build straight and true, take a few minutes to guarantee 

things are straight before gluing on the tail surfaces.

First bolt on the wing. Now, to align the stab, slide it in place.

Look at the fuselage straight on, from the nose (or tail) and make 

sure that the stab is level with the wings. If not, remove the stab 

and gently sand the stab cutouts in the fuselage sheeting a little at 

time. Check the stab and 

re-sand the supports as 

needed.

Step 64 - Fuselage Assembly (stab alignment)

Once leveled, ensure that the 

stab is aligned with the wing 

by measuring the distance from 

the left wing tip to the left tip 

of the stab. Compare this to the 

distance between the right wing 

and right stab tip. Slide the stab a 

bit until these two measurements are 

equal.

Use a pencil to mark on the stab where it 

intersects with the fuselage on each side, then

Remove the stab, apply glue in the fuselage slots, then attach the 

stab in place.

Using scrap 3/16” square 

balsa, cut two pieces, roughly 

3” in long. From the underside 

of the fuse, glue one of the 

strips in on each side where 

the fuselage and stab join - 

this will stiffen up and support 

the joint.

Step 65 - Fuselage Assembly (PG)

Before the top and bottom 

sheeting is installed, we 

recommend installing the 

elevator and rudder pushrod 

guides inside the fuselage. 

Pushrods are not included 

and we recommend a set of 

flexible pushrods, similar to

those by Du-Bro, Sullivan, etc. These have an outer tube which 

is permanently installed in the fuselage. We include a set of PG 

pieces on BP4 to act as pushrod supports. These are meant to be 

glued to a couple of the formers and the pushrod’s outer tubing 

then glued to the PG pieces, similar to what’s shown in the photo.

Step 66 - Fuselage Assembly (aft bottom sheeting)

Now, using the 1/16” sheets 

it’s time to sheet the bottom 

of the aft fuselage.

This is done a piece at a 

time, starting up against 

the back of LG3. Hold the 

1/16” sheeting against the 

fuselage, making sure the 

grain is cross-ways. Mark, 

cut and glue the first 4” section of sheeting in position. Using this 

same technique, work your way backward 4” at a time, until you 

reach the rear of the fuselage. Be careful not to waste as little of 

the sheeting as possible.

Step 67 - Fuselage Assembly (front bottom sheeting)

Now, using the 3/32” sheet 

it’s time to sheet the bottom 

of the front of the fuselage.

This is done a piece at a 

time, starting up against the 

front of LG3 and running up 

to the joint in the fuselage 

side sheeting (see diagram). Carefully mark, cut and glue sections 

of cross-grain 3/32” sheeting.

Step 68 - Fuselage Assembly (vertical fin)

Locate the vertical fin assembly from 

and glue it in place as shown. The fin 

should be firmly seated in the pre-

cut grooves in both F7 and F8A. 

Sand the fin if necessary to get a 

firm, slop-free fit. Also ensure that 

the fin is perfectly vertical (90° in 

relation to the stab).

Mark and trim the 3/16” longerons as needed  for clearance.

Step 69 - Fuselage Assembly (top sheeting)

Using the same techniques 

used to sheet the bottom of 

the fuselage, it’s now time to 

sheet the top. Again, use 1/16” 

sheets, cross-grained, in 4” 

sections at a time.

When you reach the front of the 

A

A

C

C

B

B

3/32” 

sheeting

Sheeting 

stops here.

Summary of Contents for Mambo

Page 1: ...at is in first 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...

Page 2: ...sheet 1 BP9 laser cut 3 32 x 4 x 11 5 sheet 2 BP10 laser cut 3 32 x 4 x 24 sheet 1 BP11 laser cut 1 16 x 4 x 24 sheet 1 BP12 laser cut 1 16 x 4 x 24 sheet 1 BPTIP laser cut 1 4 x 4 x 9 sheet 1 3 32 x...

Page 3: ...ok a little different in some steps 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...

Page 4: ...hould face R2 and be at the top as shown here Make sure it is perpendicular to R3 then glue in position Step 8 Wing Assembly WH4 and WH5 Locate one WH4 and one WH5 from LP1 First position WH4 into R3...

Page 5: ...is firmly seated while the glue cures Also make sure to remove any excess epoxy that may drip on the face of R1 Epoxy is easier to clean off before it cures by using a paper towel lightly soaked in a...

Page 6: ...on Measure and cut two 2 1 4 pieces Round both ends of both pieces and set them aside Now locate DG from LP1 and tape in place to the rear of the wing right in the center use the pre etched DG center...

Page 7: ...on of the tail surfaces Prepare your work area Now tape the horizontal stabilizer plan and a fresh piece of waxed paper on your building board Step 29 Horizontal Stab Assembly S1 Locate both S1 s from...

Page 8: ...TR1 has an etched circle on the top surface at the front edge Since you re using the Apprentice motor and motor mount hold F3 as shown top up on the building board then slip TR1 in at an angle making...

Page 9: ...place Take care that these pieces are orientated the right way when glued to FS2 When correct both LG2 s will face each other and the tabs of LG1 will be firmly seated in FS2 Step 42 Fuselage Assembl...

Page 10: ...F2 to obtain a secure fit F2 needs to be flush against the front of TR1 and the tabs from both fuselage sides need to be inserted into the pre cut slots in F2 When satisfied on how these pieces go to...

Page 11: ...e Assembly rear cap Back when you made the wings the leading edge was created from 5 16 square stock Use a piece of this stock to form the rear fuselage cap This piece will fit between the fuselage si...

Page 12: ...ach the stab in place Using scrap 3 16 square balsa cut two pieces roughly 3 in long From the underside of the fuse glue one of the strips in on each side where the fuselage and stab join this will st...

Page 13: ...unding the corners if you d like Step 74 Elevator Slot For the most of the Mambo build we ve tried to do as much engineering and pre cutting for you But for this step you ll need to do a little bit of...

Page 14: ...motor you ll need to make a hole for the cooling air to escape the rear of the fuselage We choose to cut a hole just forward of the stab on the underside of the fuselage Logos numbers etc If you want...

Page 15: ...t fit then glue it in place You can pickup a pilot at your local hobby shop and for a few bucks you can add a nice look to that front cockpit area Give both pieces of the canopy a quick wash in warm s...

Page 16: ...ll need to attach your engine mount to the firewall Carefully measure where the mount should be attached making sure your engine s crankshaft will be in line with the thrust line noted on the plans On...

Page 17: ...from idle to full throttle and back Also ensure the engine is tuned according to the manufacturer s instructions and it will run consistently and constantly at full throttle when adjusted Check all th...

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

Page 19: ...Construction Manual www oldschoolmodels com Page 19 APPENDIX A...

Page 20: ...Page 20 www oldschoolmodels com Construction Manual...

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