Operating Instructions
Himax C 4220-xxxx – brushless outrunner motor
MULTIPLEX Modellsport GmbH & Co.KG • Westliche Gewerbestraße 1 • D-75015 Bretten • www.multiplex-rc.de Page 2/2
Himax C 4220-xxxx instructions (08-08-04/DAMA) Errors and omissions excepted © MULTIPLEX
For relatively slow-flying models the propeller should have a
diameter : pitch ratio (D:P) of up to 2:1 (typically a 10” x 5” or 12”
x 6”).
Model aircraft designed for high-speed flying need propellers
with a D:P of up to 1:1 (e.g. 5” x 5”). Maximum thrust is achieved
with a D:P of 2:1, maximum speed with a D:P of 1:1.
When making these calculations always keep within the
maximum permissible rotational speeds stated for the motor and
propeller.
Example: Typical power system for an aerobatic model with an
all-up weight of around 2.0 kg, using the Himax
C 4220-0620
From the flying weight of 2.0 kg and the type of model we see
that the input power should be (2.0 kg x 250 Watt / kg Æ)
approx. 500 Watts.
Let us assume that you want to use a 4S LiPo battery. 90% of
the nominal voltage (3.7 Volts / cell x 4 cells) is 13.2 Volts. This
gives the required current of (500 Watts / 13.2 Volts), or around
38 A.
As this is a model with a relatively low airspeed, you would
select a propeller with a D:P ration of around 2:1. This means:
you need a propeller of around 15“ x 8“.
Despite the careful calculations, always measure the speed and
current drain of your motor under load at full throttle. Over-
loading a motor may result in overheating and damage.
Voltage / current diagrams for C 4220-series motors
10
15
20
25
30
35
40
45
50
12 13 14 15 16 17 18 19 20 21 22 23 24
Volts
Amp
15 x 8 14 x 8.5 13 x 8 13 x 6.5
C 4220-0510 - current / voltage with different propellers
20
25
30
35
40
45
50
55
10 11 12 13 14 15 16 17 18 19 20
Volts
Amps
15 x 8 14 x 8.5 13 x 8 12 x 8
C 4220-0620 - current / voltage with different propellers
7. GUARANTEE
Our products are covered by the currently valid statutory
guarantee regulations. If you wish to make a claim under
guarantee, please contact the model shop where you purchased
the product in the first instance.
The guarantee does not cover faults and defects which are
caused by the following errors:
• Improper operation (e.g. overheating), incorrect connections,
reversed polarity
• Use of accessories other than genuine MULTIPLEX items
• Accidental or deliberate damage
• Faults due to normal wear and tear
• Operating the motor outside the technical specification
• Modifications / repairs which were not carried out by
MULTIPLEX or an authorised MULTIPLEX Service Centre Æ
always use our official service for repairs
8. CE APPROVAL
This product has been assessed in accordance with the
relevant harmonised European directives. You are
therefore the owner of a product whose design fulfils the
protective aims of the European Community relating to the safe
operation of equipment.
You are entitled to see a copy of this Conformity Declaration.
Please contact MULTIPLEX Modellsport GmbH & Co.KG if you
wish to do this.
9. DISPOSAL INFORMATION
Electrical equipment marked with the cancelled
waste bin symbol must not be discarded in the
standard household waste; instead it must be taken
to a suitable specialist disposal system.
In the countries of the EU (European Union) electrical equipment
must not be discarded via the normal domestic refuse system
(WEEE - Waste of Electrical and Electronic Equipment, directive
2002/96/EG). You can take unwanted equipment to your nearest
local authority waste collection point or recycling centre. There
the equipment will be disposed of correctly and at no cost to
you.
By returning your unwanted equipment you can make an
important contribution to the protection of the environment.
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