Sebart MC-72 50E ARF scale Programming manual

SebArt professional line
MC-72 50E ARF scale
ASSEMBLY MANUAL
The real plane
The Macchi Castoldi MC-72 flew to become the fastest propeller dri en
sea plane e er on October 23, 1933, with the still standing record speed of
709.2 km/h ( 440.68 mph.)
In 1928 Macchi Aeronautica start work with G. Diliberto and M. Castoldi
on the Macchi Castoldi MC-72, at that date the most re olutionary project
for a Schneider Cup racer and world record achie er.
The MC-72 incorporated a twin engine design, two Fiat V-12 engines
linked together one behind the other, powering two counter-rotating
propellers. An arrangement that worked surprisingly well, because this
design ad antage is that counter-rotating propellers balance the effects of
torque, making easier the control of the plane in e ery flight condition.
The aircraft could be a hand full for no ice pilots and more experienced
pilots praised the MC-72 for its speed, responsi eness, and directional
stability.
The Macchi Castoldi MC-72 remains a winner to this date.
Specifications:
Year Built: 1931
Primary Function: racer
Length: 8,32 m (27' 4")
Wingspan: 9,48 m (31' 10")
Weight Empty: 2.500 kg (5,512 lbs.)
Max. Speed: 709 km/h (440 mph)
Engine: 2 x Fiat AS.6 V-12
Horsepower: 2,850 hp

The model
The MC-72 50E ARF scale, was designed by the 13 times Italian
Champion Sebastiano Sil estri, ice-European Champion and
F.A.I World Cup winner F3A.
This professional ARF kit is the result of Sebastiano’s long
research, experience in F3A and his passion for scale planes. This
combined with an extremely light weight structure and with many
small aerodinamical tricks gi e the MC-72 50E an impressi e
precision and easy control at any airspeed and flight condition.
The MC-72 50E can do it all… it can start and land ery easy on
water as on ground with grass surface, thanks to the small wheels
on floater’s bottom. It is ready for any pattern manou ers as for
unbelie able easy knifeedge flights, loops, rolling circles, negati e
flat spins... and almost anything else you can dream up from a sea
plane are waiting you!
.....the onl aerobatic-fun limit is our fantas !
Specifications:
Wing Span:………………...…….............................152 cm
Length:….......…….……………..........................…140 cm
Wing Area:……........................................................40 dm2
Weight:……..................................2.900g. RTF less battery
Radio:.....5-Channel with 2 standard + 2 low profile ser os
Recommended power set up:
Motor:....................................................... Hacker A50-14S
ESC:…......................................Hacker Master Basic 70 SB

Propeller: …..........................….…....................APC 16x8E
Battery: ….........................................…4000-5S or 4500-5S
Required radio, motor and batter
Radio equipment:
• Minimum 5-channel radio system
• 2 standard + 2 low profile ser os (JR PROPO DS8301 and DS9511)
• 2 ser o extension 100mm, for aileron’s ser os
Recommended electric motor for best performance:
• Hacker A50-14S + X70 SBec-Pro controller + APC 16x8E
Recommended Li-Po battery pack for best performance:
• 4000mAh 5S or 4500mAh 5S
Additional required item, tools and adhesives
Tools:
• Drill
• Drill bits: 1,5mm
• Phillips screwdri er
• Hobby knife
• Sanding paper
• Masking tape
• Soldering iron
Adhesives:
• thin CA
• medium CA
• silicon
Warning
This RC aircraft is not a toy!

If misused, it can cause serius 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.
Before starting assembl
Before starting the assebly, remo e 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 co ering, use a heat gun or co ering iron to remo e
them. Use caution while working around areas where the co ering material o erlap to
pre ent separating the co ers.
Warrant information
SebArt garantees this kit to be free from defects in both material and workmanship at
the date of purchase.
This warranty does not co er 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 reser e the right to change or modify this warranty without notice. In
that SebArt has no control o er 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 carefully the recommended linkage setups:
For the ILERON we recommend the following throws:
High rate: 30° left & right
Normal flight: D/R: 40% Expo: 40%

Snap, knife edge loop: D/R: 80% Expo: 60%
Start, spin, landing: D/R: 100% Expo: 70%
For the ELEV TOR we recommend the following throws:
High rate: 30° up & down
Normal flight: D/R: 40% Expo: 50%
Snap, knife edge loop: D/R: 40% Expo: 50%
Start, spin, landing: D/R: 100% Expo:75%
For the RUDDER we recommend the following throws:
High rate: 30° left & right
Normal flight: D/R: 60% Expo: 20%
Snap, knife edge loop: D/R: 80% Expo: 30%
Start, spin, landing: D/R: 100% Expo: 50%
Note: the Expo is (+) for JR systems, and (–) for Futaba systems.
Mixing
We recommend the following mix (if you ha e a programmable computer radio):
Rudder →Elevator UP
full rudder to the right, the ele ator ha e to go up (positi e) approx. 24%
full rudder to the left, the ele ator ha e to go up (positi e) approx. 12%
Rudder → Ailerons
full rudder to right the ailerons need to go right 4%
full rudder to left the ailerons need to go left 5%
Use 10% aileron differential (more up)
Recommended Center of Gravit
The recommended CG is 85mm behind the leading edge of wing.
Pre-flight

Never attempt to make full throttle dives! This model ha e to be flown like a full-
scale airplane. If the airframe goes too fast, such as in a high throttle di e, it may fail.
Throttle management is absolutely necessary.
Range test our radio
Before fly, be sure to range check your radio as manufacturer’s instruction
manual of you radio-system recommend.
Double-check all controls (aileron, ele ator, rudder and throttle) mo e in the
correct direction.
Be sure that your motor battery pack is fully charged, as per the instructions
included with your batteries and that your radio is fully charged as per its
instructions.
Finall ... have nice flights!
SEB RT International S.r.l.
Via L. Tabellione, 1
47891 Ro ereta - Repubblica di San Marino (RSM)
www.sebart.it