Sebart Katana S 50E V.2 User manual

SebArt professional line
Katana S50E V.2 ARF
ASSEMBLY MANUAL
The new Katana S 50E V.2 ARF was designed by Italy aerobatic
pilot Sebastiano Silvestri.
This professional ARF kit is the result of Sebastiano’s long
research in 3D performance and precision. This combined with an
extremely lightweight structure, the all wood airframe and the big
control surfaces give the Katana S 50E V.2 an impressive thrust-
to-weight ratio and crisp control authority at any airspeed and
flight condition.
The Katana S 50E V.2 can do it all… precision aerobatics
manouvres… easy harriers, torque rolls, blenders, waterfalls and
all this for a biplane of this class is unbelievable!
.....the only aerobatic limit is your fantasy!
Specifications: Recommended set up:
Wing Span:..……….…….........................146 cm Radio: 6-Channel with 4 standard servo
Length:…….............………………….... 146 cm Motor:........................ Hacker A50-14S
Wing Area:….............................................49 dm² ESC:………….Master basic 70 S-BEC
Weight:…2.400-2.500 g. RTF less motor battery Battery: Top Fuel 4000-5S or 4500-5S
Propeller: ..…………….....APC 16x8E

Required radio, motor and battery
Radio equipment:
•Minimum 6-channel radio system
•4 standard digital JR DS 8301 or DS 9511
•2 servo extensions 500mm, for elevator and rudder servos
Recommended electric motor for best performance:
•Hacker A50-14S + Jeti Master Basic 70A SBec + APC 16x8E
•Battery pack Top Fuel 4000-5S or 4500-5S
Additional required item, tools and adhesives
Tools:
•Drill
•Drill bits: 1,5mm; 2mm; 2,5mm; 3mm
•Phillips screwdriver
•Hobby knife
•Masking tape
•Paper towels
•Rubbing alcohol
•Sand paper
•Soldering iron
•synthetic oil
Adhesives:
•5-minute epoxy
•thin CA
•medium CA
Warning
This RC aircraft is not a toy!
If misused, it can cause serious bodily harm and damage to property.
Fly only in open areas, preferably in official flying sites, following all instructions included with
your radio and motor.
This plane is a compromise between Aerobatics and 3D flying, and not a pylon racer.
It is built with a very light structure and for this reason we hardly recommend:
→Do NOT fly your airplane at high speeds, because this may cause structural
failures or flutter due to the extremely large control surfaces.

Before starting assembly
Before starting the assembly of your Katana S 50E V.2, remove each part from its bag and
protection for a prior inspection. Closely inspect the fuselage, wing panels, rudder, and stabilizer for
damage. If you find any damage or missing parts, contact the place of purchase.
If you find any wrinkles in the covering, use a heat gun or covering iron to remove them. Use
caution while working around areas where the covering material overlap to prevent separating the
covers.
Warranty information
SebArt garantees this kit to be free from defects in both material and workmanship at the date of
purchase.
This warranty does not cover any parts damage by use or modification, and in no case shall
SebArt’s liability exceed the original cost of the purchased kit.
Further, SebArt reserve the right to change or modify this warranty without notice.
In that SebArt has no control over the final assembly or material used for the final assembly, no
liability shall be assumed or accepted for any damage of the final user-assembled product. By the
act of using the product, the user accepts all resulting liability.
If the buyer is not prepared to accept the liability associated with the use of this product, the buyer
is advised to return this kit immediately in new and unused condition to the place of purchase.
Control throws
Please, follow the recommended linkage setups:
For the AILERON we recommend the following throws:
Low rate: 20° up / 20° down Expo: 40%
3D rate: 45° up / 45° down Expo: 80%
For the ELEVATOR we recommend the following throws:
Low rate: 20° up / 20° down Expo: 25%
3D rate: 60° up / 60° down Expo: 80%
For the RUDDER we recommend the following throws:
Low rate: 30° left / 30° right Expo: 30%
3D rate: 50° left / 50° right Expo: 60%
Note: the Expo is (+) for JR systems, and (–) for Futaba systems.

Mixing
For best performance, we recommend a linear-mix*:
Rudder →Elevator UP
When you give full rudder to the right or left side, the elevator have to go up (positive) approx. 8%
Rudder →Ailerons
When you give full rudder to right the ailerons need to go left approx. 2%
When you give full rudder to left the ailerons need to go right approx. 2%
* if you have a programmable computer radio.
Recommended CG
The recommended Center of Gravity location is 125mm behind the leading edge of the wing
against the fuselage.
¾120mm is good for aerobatics
¾130mm or more is good for 3D
You can use the battery pack, moving it forward or backward, to achieve the correct balance.
Range test your radio
9Before fly, be sure to range check your radio as manufacturer’s instruction manual of you
radio-system recommend.
9Double-check all controls (aileron, elevator, rudder and throttle) move in the correct
direction.
9Be sure that your batteries are fully charged, as per the instructions included with your
batteries and that your radio is fully charged as per its instructions.
...good flights!
SebArt di Sebastiano Silvestri
Via Trento 69/3
38017 Mezzolombardo (TN) – Italy
www.sebart.it