Choosing a power system:
Power system can be chosen based on the type of flying ex-
pected of the model and all up weight of the aircraft. Sedate flying
from a hand launch requires 35 watts per pound(W/Lb). Taking off
the ground needs approximately 50W/Lb. Aerobatics and good
climb performance, 75W/Lb. Anything more than 75W/Lb will
result in excellent performance. Based on the weight of the model
and the flying desired, the power require can be calculated. Se-
lect the voltage of the battery being used. It is best to use a loaded
voltage of about 98% of nominal. Now, calculate the current re-
quired. From the chart, pick a motor at the voltage you intend to
use and find the prop that pull the required current.
Propeller selection:
Use the chart to start with propeller selection. It is a starting
point. If you intend to use different props or battery voltage we
recommend testing several setups and make sure to Verify cur-
rent draw when testing. Failure to do so may damage the
motor and will void the warranty. Different models use differnt
props. Most sport models will use a prop with a P/D or 0.6-0.8.
Models that are designed to fly at high speed or have other spe-
cial requirements will use props in the 1.0 P/D range. The high-
est static thrust will be available from the 0.6 P/D props, but they
have limited top speed. Highest speeds can be attained with 1.0
P/D props, however low speed thrust and acceleration is limited.
Warranty:
Himax motors have a two year limited warranty to the original
owner, excluding gearboxes. All motors are guaranteed to be free
from manufacturing defects within two years of date of purchase.
Not covered under warranty is crash damage, customer abuse,
improper use, or overheating. Note use of 4 cell LiPo would
constitute Improper Use. Warranty claims should be handled
directly with Maxx Products, 815 Oakwood Rd, Unit D, Lake Zurich,
IL 60047. Be sure to include contact information and a descrip-
tion of the problem including which ESC, battery, and prop was
being used. If possible visit www.maxxprod.com to obtain a ser-
vice form.
Service:
Himax motors in need of service should be sent to Maxx
Products, 815 Oakwood Rd, Unit D, Lake Zurich, IL 60047.
Please include a note explaining the problem. Return shipping
for repair estimates must be prepaid.
Reversing the Shaft:
1.First of all, never use a hammer or heavy object to pound or tap
on the motor. Sharp impact will damage ball bearings and other
components.
2.Use an alen wrench to remove the setscrews in the endbell
(fan rotor). The setscrews may be tight because thread locker
is used to secure them. Heating with a heat gun will soften the
thread locker. Then move the snap ring to the outer groove.
3.In order to maintain critical balance, the shaft fits tightly in the
rotatingendbell. Use an arborpress or drill pressto exert steady
pressure to push it through endbell. Before applying pressure,
make sure the press and shaft are aligned. Avoid using a vise
because it is difficult to maintain proper alignment with a vise.
Press through until there is just light pressure against the
snap ring. Too much pressure will damage the bearings.
4.There are flats on the shaft. Align the flats with the set screws,
and tighten. If you wish to use thread locker, use only a
removable type and use sparingly.
Removing the Shaft:
1.Follow procedure as above except REMOVE the snap ring.
2.Separate the stator assembly and rotor assembly. This may
be tight because thread locker sometimes seeps between the
shaft and ball bearing. Press out the old shaft (see #3 above)
then press in the new shaft.
3.There are flats on the shaft. Align the flats with the set screws,
and tighten.
6.Put the rotor and stator assemblies back together and reinstall
the snap ring. If you wish to use thread locker, use only a
removable type and use sparingly.
Maintenance:
Brushless motors are almost maintenance free, so minimal
care is required for long life. Keep the motor clean free of dust
and dirt, especially the bearings. Dirty bearings wear quickly.
Lubricate the bearings regularly with light oil. Do not immerse
the motor in water, or solvents. Do not bend the wires excessively
and secure wires to prevent breakage due to fatigue from vibra-
tion. Always used balanced propellers to reduce loads on bear-
ings, to reduce noise, and reduce stress on the airframe.
Reading the Chart
The graph represents the HC3514-2900
operating range. Current ratings are noted
on the front of this manual. The suggested
props are not a recommendation for any
specific airframe or flying style. The graph
does give a range of props to work with and
an idea of the current draw. The chart as-
sumesAPC Electric series propellers. First,
approximate the operating voltage, 1-1.1
volts per NiXx cell or 3.5 volts per Lithium
cell. As an example we are using an 3 cell
LiPo pack. 3 x 3.56= 10.8V. Follow along
the 10.8V line up the chart. If using a 6X5.5
propthis motor will draw approximately 74A.
This would be acceptable for full throttle
continuous flight on a small high speed
airframe. Note: this motor is designed to
use 2 or 3 cell LiPo. Use of a 4 cell LiPo
(over 12 volts) will void the warranty.
HC3514-2900 Current vs. Volgage with Propeller
0
10
20
30
40
50
60
70
80
6789101112
Voltage
Current
7x5 6x5.5 6x4 5.5x4.5
