All servos should be standard size dimensionally to fit in the
openings provided in the aircraft structure.
Note: The large control throws used in 3D flying require a servo
with precise centering capability. You can not expect this airplane
to give you optimum 3D performance using non-ball bearing
standard servos.
Servo Chords Needed:
Ailerons - one standard y-harness
Elevator - one 12" servo extension chord
Rudder - one 12" servo extension chord
ENGINE SELECTION
The MAYHEM has been designed to perform well when using the
recommended engine sizes. Do not use an engine larger than
recommended.
Recommended Engines:
.40 to .46 cu.in.
2-Stroke
.52 to .70 cu.in.
4-Stroke
Very Important: The MAYHEM 40 is designed for slow speed,
high torque aerobatics. It's fantastic low speed maneuverability is
the result of light weight and very large control surfaces - which are
naturally prone to flutter if flown at excessive airspeeds. To avoid
problems, follow these carefully tested guidelines:
1) Do not use engines larger than recommended. Resist the
urge to overpower your MAYHEM 40 with larger engines, which
can cause balance and structural problems, and produce
excessive airspeed.
2) Do not use a propeller with more than 6 inch pitch. Keep the
airspeed of the MAYHEM down by using low pitch propellers.
3) Do not fly full throttle except during climbs of at least 10
degrees. Always throttle back when in a dive.
Ignoring these cautions will put your model at high risk for
catastrophic in-flight structural failure.
REQUIRED TOOLS
For proper assembly, we suggest you have the following tools and
building materials available:
A selection of glues - thin, medium, and thick SIG CA, and
SIG Epoxy Glue (5-minute and 30-minute)
Threadlock Compound, such as Loctite
®
Non-Permanent Blue
Silicone Sealer - clear or white
Screwdriver Assortment
Pliers - Needle Nose & Flat Nose
Diagonal Wire Cutters
Small Allen Wrench Assortment
Drill with Assorted Drill Bits
Pin Vise for Small Dia. Drill Bits
Hobby Knife With Sharp #11 Blades
1
INTRODUCTION
Congratulations on your purchase of a SIG MAYHEM 40 ARF. This
is not your average R/C aerobatic flyer! Properly assembled,
powered and flown, the MAYHEM 40 can take you into the exciting
world of 3D aerobatic flying.
Generous wing area, lightweight
construction, and huge control surfaces with large amounts of
travel, enable the MAYHEM 40 to perform the extreme 3D
maneuvers you've been reading about … hovering, harriers,
waterfalls, blenders … the MAYHEM 40 can do them all.
NOTE: The MAYHEM 40 is not suitable for beginners. While it is
a terrific flying airplane, it's neutral stability and quick controls are
beyond the capabilities of beginning R/C pilots. You should be
capable of flying low-wing, aileron equipped R/C models before
flying this airplane.
EASY TO ASSEMBLE
The MAYHEM 40 ARF has been engineered to get you into the air
as quickly as possible with an R/C model that compares to the
best scratch-built airplanes.
The airframe has been expertly
constructed of the finest balsa and plywood available, then
professionally covered with tough SIG AEROKOTE™ polyester
film. The airplane is both rugged and easy to repair.
This assembly manual has been sequenced to get your MAYHEM
assembled and into the air very quickly. We strongly suggest that
you read through the manual first to familiarize yourself with the
various parts and assembly sequences. The successful assembly
and flying of this airplane is your responsibility. If you deviate from
these instructions, you may wind-up with problems later on.
RADIO EQUIPMENT
The MAYHEM 40 requires a 4 (or more) channel radio system
with five servos.
We highly recommend the use of a modern
programmable computer radio. Such radio systems allow you to
easily set and adjust every channel and additionally program
various flight functions to suit your individual style of flying.
Servo Requirements:
Ailerons -
two(2) standard or high performance servos
Elevator -
one(1) standard or high performance servo
Rudder -
one(1) standard or high performance servo
Throttle -
one(1) standard servo
Standard vs High-Performance Servos?
Standard servos with 45-55 in/oz of torque will fly the MAYHEM 40
with no problem, including basic pattern-style aerobatics. However
if 3D flying is your goal, you should consider upgrading to extra
high speed ball bearing servos for the ailerons, elevator, and
rudder (we used Hitec HS925MG high speed ball bearing servos
in the prototype shown in this manual).
