RC Factory RS 352 Instruction Manual

Kit contents:
*fuselage
*canopy
*stabilizer
*rudder
*wings
*landing gear
*carbon parts
*wheel covers
*building instructions
*accessory bag
2x wheel pants holder
1x landing gear base mount
2x landing gear lock
2x firewall holding tab
4x ball link clevis
2x wheel 50 mm
1x wheel 25 mm
1x tube 3/2 x 15 mm - elevator pushrod support
2x carbon 1x5x150 - elevator reinforcement
2x carbon 2x50 - aileron pushrod
1x kevlar string 1.5m - rudder pull pull system
1x motor mount
4x motor mount anchoring tabs
Connection stainless hardware:
4x screw M1.6x4 ... ball clevises
2x screw M2x5 ... rudder hinges
2x screw M2x5 ... pull pull fasteners
1x screw M2x8 ... tailwheel axle
2x nut M2 ... tailwheel axle
2x Allen M3x14 ... landing gear axle
4x washer 3 ... landing gear (see Diag.)
2x nut M3 ... landing gear (see Diag.)
2x tapping screw 2.9x9 ... LG legs lock
2x Allen M2.5x6 ... motor attachment
2x Allen M3x6 ... alternative dtto
2x Z bend ... elevator pushrod
1x frame, control arms and horns
1.
1.
2.
3.
4.
5.
6.
7.
8.
4.
CFparts-frame, control arms and horns:
1. rudder hinge, fuselage part (2 pcs)
2. rudder hinge, lower rudder part
3. elevator servo arm extension
4. aileron control horns
5. rudder control horn
6. rudder servo arm extension
7. tailwheel leg
8. elevator control horn
You will also need:
Allen key No. 2
Philips screwdriver
standard screwdriver
CA glue + activator
hobby knife
flat file
sand paper 100 - 500
3 mm drill bit
a bit of patience for cca 5 hrs
RS 352 - 1,2m

RS 352 – 1.2m aerobatic EPP model
Building instructions
Please follow the Diagram Sheet.
Tip: sand the GF (glass-fibre) parts before gluing
Diag. A, B
Push 2 flat cf strips (1x3x1000 mm) into the slots on the sides of the central fuselage part (the „backbone“). Lay the
backbone on its side on your building board and make sure that it is perfectly straight. Apply CA glue over the cf
strips and let cure.
*In this step, please try not to save on the glue and use thin CA only. The quality of this joint determines the rigidity of
you fuselage, both in bend and torsion.
Diag. C
Glue the wing halves to the backbone. Note the small tabs that help you align the wing correctly. Slightly push on the
thickest part of the wing root to help the wing settle in the correct incidence.
Important: if you glue the wing in normal (not inverted) position – the upper surface facing up – the stabilizer cutout
in the backbone should be also facing up. On Diag. C the wing and the backbone are depicted in inverted position.
Diag. D
Locate two cf strips, 1x5x850 mm. Cut shallow slits into the wing and backbone, spanwise, both on the upper and
lower surface of the wing. Push the cf strips into the slits and make sure that the wing and backbone assembly rests
flat and straight on a level building board. Apply thin or medium CA over the strips and let cure. Cut shallow slits
according to the mark 2 of the Diag. You will later mount the LG (landing gear) locks here.
Diag. E
Likewise cut 2 slits into the stabilizer and push 2 cf strips (1x5x150mm) there.Cut a shallow slit into the bottom of the
fuselage stabilizer. Push carbon 1x5x250 mm there and glue with thin CA. Lay the stabilizer on a flat board and apply
CA glue over the carbon strips.
Diag. F
Use medium CA to attach the (black EPP) canopy to the fuselage. Use your hobby blade to separate the upper and
lower part of the fuselage.
Diag. G
Rest your (wings and backbone) assembly on your board, inverted (bottom side up). Assemble the LG mount and glue
it to the backbone into the slits you made according to Diag. D mark 2.
Diag. H
CA glue the lower fuselage part to the (now inverted) backbone. Attach (CA again) the stabilizer to the backbone, first
making sure that your alignment is perfect and square.
Diag. I
Drill holes into the LG legs.
Diag. J
Push the LG legs into the LG mount. It may be a very tight fit, in such case use small file to increase the openings.
Use 2 tapping screws (2.9x9 mm) to attach the legs to the mount. To release the legs, just loosen the screws a bit.
Assemble the landing gear according to the Diag. Gluing the EPP wheel covers to their holding tabs is the last
operation.
Diag. K
Now is the right moment to install the aileron servos. Make sure you find the right position (consider cables lenghts,
or use extension cables). We prefer the location at about 1/3 of the wingspan. Cut out enough material from the wing
to make the servo a tight fit. Use hot glue (preferred) or thick (!) CA to glue the servos in place. You may want to
cover the servos in masking tape first for protection. Cut and glue the control horns into the ailerons (follow the
Diag.). Make sure you have the right geometry in your servo horn – in servo neutral, the horn should be inclined cca
13° - not critical - „backwards“, towards the aileron. Assemble the control links.
Diag. L
Use thin or medium CA to attach the upper fuselage part.

Diag. M
Assemble the tailwheel system and glue it to the lower rudder hinge. Get the other part of the hinge and thread the M2x5
screw throught the corresponding holes to make the hinge complete. There is no thread cut in the holes, but using some
force you may twist the screws through – they will push their way into the material since the holes are just the right size.
Create the upper hinge in the same way, the rudder control horn is part of the upper hinge. Make corresponding cuts into
the fuselage and rudder, install the hinges using thin CA. Note – the cut for the lower hinge (and tailwheel mount) in the
rudder is T shaped when you look from the front.
Diag. O
Glue the 4 anchoring tabs into suitable slits in the fuselage, using medium CA glue as indicated. Test fit the motor mount
and if satisfied, CA glue into place. The mount should well touch the EPP wherever possible – both the structural
strength and thrust angle depend on it.
Diag. P
Elevator control link: the servo is on the side of the backbone. Cut out the material for a tight fit, make sure that the
location is within the reach of the servo cable to the receiver. Glue in servo using preferably hot glue, or a thick CA.
Again you may cover the servo in masking tape first. Locate carbon tube 2/1 x 500 mm – your elevator pushrod. On the
elevator side, glue the stainless Z wire into the tube, leaving cca 10 -15 mm out of the tube. Put the Z bend through the
elevator control horn, cut and CA glue the control horn into the elevator. Test the elevator movement. Thread the orange
supporting tube (3/2 x 15 mm) onto the pushrod and glue it to the backbone about half way between the servo and
elevator.
Install the Z bend on the servo side, with servo arm in neutral. If the ele. throws are not sufficient, use the included servo
extension horn.
Diag Q
Rudder control link: install the servo just like you did the elevator one. Attach the extension servo horn to the original
one using kevlar line and CA. Thread the two M2 x 5 screws into the extension horn. The pull – pull system uses the
included kevlar line. Glue the line to the M2 screws, you can use them to tighten the line when necessary. On the rudder
side, just tie the line into the control horn (and also use a drop of CA to prevent the sharp hole edges from tearing
through the line).
Setting up and Trimming
We hope that you know how to connect and set up your RC system. If not, refer to the relevant instruction manual or
better ask a more experienced model aviator.
For maximum flight envelope, use the biggest mechanically possible control throws. The rudder throws may be slight
less, say 50°. The aileron throws should be the same up and down. For first flights, or if you do not feel like an expert 3D
flyer, use somewhat lower throws – some 60% of the maximal ones. Use exponentials of 30 to 60% or to your best
liking.
For first flights, we recommend centre of gravity (CoG) at some 125 mm from the leading edge (root of the wing). At the
beginning, use adhesive velcro tape to attach the battery. This will help you find the right CoG (we like it quite aft, so
much that the plane tends to fly „hands off“ both normal and inverted). When happy with the CoG, you may (or may
not) cut a slot for the battery in the (upper) fuselage. The vertical CoG may influence rolling tendencies (there should be
none) in knife edge (KE) – you may want to put the battery under the backbone if the model rolls to inverted from KE.
Some people don’t go this far and simply just use mixes to fix KE issues.
Our method for getting the right elevator trim is a power off vertical dive – the plane should fall straigh down, like a
brick J.
Aileron trim should be perfect both normal and inverted – if not, you may have a lateral balance issue. Try putting the
battery to the other side of the fuselage, this should do most of the time.
After all these steps, the model should fly straight and also hover without any bad tendencies. Hover can be adjusted by
slight thrust line adjustments (insert washers between the motor and the motor mount), but most likely there will be no
need for going that far.
Clean rolls (with no „barrel“ tendencies) can be achieved by dialing in the correct aileron differential. If your radio does
not allow this, you may just set different up and down aileron throws). Equal up and down throws should work just fine,
though.
Enjoy your new EPP RS 352 1.2m
Your RC Factory team.
Specifications:
Wingspan: 1200 mm
Length: 1252 mm
AUW: 600 – 800g
Motor: 200 – 300W outrunner (ca 70 – 120g)
Servos: 12 – 20g good quality servos
Battery: 1600 – 2500 mAh 3s lithium polymer

CACA
CACA
AB
D
1.
2.
carbon 1x5x850 mm
CACA
3.
carbon3x1x1000 mm
CACA
F
G
CACA
CACA CACA CACA
H
3mm
I
C
Diagram sheet 1/2:
CACA
1.
2.
3.
E
carbon 1x5x150 mm
2pcs
carbon
1x5x250 mm
1pcs

allen M3x16mm
nut M3
washer 3
tapping screw 2.9x9
J
K
M
P
Q
13°
CACA CACA
CACA
CACA
M2x8
M2x5
M2x5
CACA
CACA
CACA
Diagram sheet 2/2:
L
CACA
M2x5
125mm
O
4x