September 2003 45
YOU MAY HAVE already seen photos of
this new Hitec RCD Neon FM three-channel
Radio Control (RC) system in previous
installments of Model Aviation’s new “From
the Ground Up” beginners’ series.
A three-channel RC system can provide
the beginner with an excellent starting point.
These systems are usually the most simple to
operate, they provide more than enough
control functions, and the overall cost is held
to a minimum.
Hitec engineers have come up with an
even better idea: they have configured the
transmitter so that more advanced control
features can be added as you gain experience
in the hobby. You purchase a basic threechannel-
function system first, then you can
add as many as four additional control
options, which will increase the system’s
overall versatility. This engineering/marketing
concept makes for an attractive initial
purchase price.
Hitec Neon FM Systems: When you go to
purchase the basic system, you will learn that
two models, or variations, are available. The
transmitter in both is identical. Hitec stock
number 148721 is the more deluxe of the two
models. That is the system I am reviewing
here.
It is supplied with a rechargeable eight-cell
nickel-cadmium (Ni-Cd) battery pack located
inside the transmitter, a charger for that
battery, the Hitec Electron 6 receiver, two
Hitec HS-81 servos, a battery holder that
accommodates four AAA-size alkaline
(nonrechargeable) cells including a power
on/off switch, a frequency flag set, and an
instruction manual.
I particularly like this system because it
includes a rechargeable transmitter battery
pack and charger, and the fact that the
Electron 6 receiver is of dual-conversion
circuitry. This system would be suited for
glow-fuel-powered models ranging from .049
cubic-inch (cu. in.) displacement up to .15 or
.20 cu. in. size. With larger and more
powerful servos, you could fly models easily
with up to .40 cu. in. power.
On the other end of the scale, you could
fly park flyers or backyard flyers that average
6-10 ounces total weight. These small models
are almost always electric-powered. If you
choose a model of this type and size, you will
only need an Electronic Speed Control (ESC)
for the motor and a rechargeable battery that
is capable of operating the motor and the
radio system on a shared basis.
Almost all modern ESCs have this
Bob Aberle
P r o d u c t R e v i e w
Hitec RCD Neon Three-
Channel RC System
Pros:
• Attractive price
• System can be upgraded to four
channels when required.
Cons:
• Servo reversing is not as simple as it
could be.
System includes transmitter with rechargeable Ni-Cd battery pack, charger, Hitec Electron 6 receiver, two HS-81 servos.
46 MODEL AVIATION
“sharing” circuit known as a Battery Eliminator Circuit (BEC). So if
you do decide to fly a small electric-powered model, the motor-control
unit takes the place of that third (engine throttle) servo.
The other Neon system is identified as stock number 148722, which
Hitec calls its “micro” version. Although the same transmitter is
employed, this model does not come with rechargeable batteries. You
will have to purchase eight AA alkaline cells to operate the transmitter.
These cells generally provide at least 10 hours of operating time before
they need to be replaced.
The Hitec HFS-04MG single-conversion FM receiver is supplied,
as are two Hitec HS-55 submicroservos. The other items in the system
are identical to those in the deluxe model. This micro version is
intended for use with small RC models such as the park or backyard
flyers and the .049 cu. in. (referred to as Class 1⁄2A) glow-fuel-powered
aircraft.
This system will cost less because it does not have rechargeable
batteries or a charger, yet in the long run it can be upgraded easily to
the same status as the deluxe version. Best of all, the four optional
transmitter add-on features can be added to either system.
Neon Three-Channel FM Transmitter: The transmitter is available on
any of the 50 channels assigned by the Federal Communications
Commission between 72 and 73 MHz expressly for the control of
model aircraft.
This is an FM system and the deviation is on the low side (also
called negative shift), which means that this system is compatible with
other RC systems manufactured by Futaba, GWS, and FMA Direct.
As is typical with most three-channel transmitters, there is only one
dual-axis control-stick assembly, and it is located at the right side of the
case. This stick assembly is intended to control rudder/elevator or
aileron/elevator on your model.
Both channels have a mechanical-type (with ratchet) trim lever
surrounding the control stick. You basically hold the transmitter case
with your left hand while your right-hand fingers grip the single control
stick. The index finger of your left hand operates the third-channel
function control, which is a small lever located on the top rear portion
of the transmitter case.
This third channel function would probably be used to operate a
throttle control on a glow-fueled engine or the speed of an electric
motor. Unfortunately this third channel position does not have a trim
control.
Slightly left of center (on the case front) is the power on/off switch.
To the right of that are three colored light-emitting diodes (LEDs) that
show the status of your battery condition. When the green LED glows,
the battery is at or near full charge. The middle amber LED signifies
that you still have usable power, but it is a caution. You stop flying
when the red LED glows, then you must recharge your Ni-Cd batteries
or replace your alkaline batteries.
Directly above the power switch is an elevon mixing switch that
A close-up of the Electron 6 receiver and the two supplied HS-81
microservos that feature 36 ounce-inch output.
Note careful placement of left-hand thumb recess on front of
transmitter. Text has other control-function details.
With transmitter halves separated, you can see one cable that
involves third channel function running to rear case cover.
There are four add-on options available for this RC system, and
they are available separately when you are ready.
Photos courtesy the author
can be turned on or off. When it’s on, the
transmitter will automatically mix the
controls from the first two channels. This will
enable you to fly models with “V” tails
(ruddervators) or elevons, as is the case with
delta or flying-wing designs. It mixes or
integrates the two control functions. This
feature is supplied with the basic transmitter.
In case you are wondering about servoreversing
switches, the function is provided,
but it isn’t done with switches. The
transmitter case has been designed so that it
can be opened (or separated in halves)
without the need for tools. You slide out the
two bottom latches, remove the crystal and its
holder, pull off the plastic antenna base, and
the case opens.
Inside you will be directed to four
separate cables—one for each channel
function (the fourth if you add that option!).
To reverse the servo direction, unplug the
particular cable, rotate the connector 180°,
plug it back in, and the servo is reversed.
While you have the transmitter open, you can
adjust the control stick’s spring tension (stick
length is adjustable from the outside!).
On one side of the transmitter case you
will find the battery-charging jack. A
standard Hitec dual-output-system charger is
supplied with the deluxe version of this
system, as is an eight-cell, 600 mAh-capacity
Ni-Cd battery pack.
The charging jack in this circuit contains a
protective diode. As such, battery voltage is
unavailable at the jack for testing purposes. If
you want to discharge-test your battery, to
determine the actual capacity, you will have
to open the case and physically remove the
pack. Hitec cautions you not to use a fieldtype
peak-detect charger on this transmitter
since the higher current might burn out the
diode and open the battery circuit.
Neon Deluxe System Airborne Components:
The popular new Hitec Electron 6 dualconversion
FM receiver is supplied with the
deluxe system. This is a relatively small and
lightweight unit measuring 13⁄4 inches long x
7⁄8 inch wide x 9⁄16 inch thick (with a crystal
projection of an additional 5⁄16 inch). Weight
on my digital scale is 0.64 ounce (18.2
grams). That weight could be further reduced
by carefully removing the molded plastic
case.
One thing I learned the first time I hooked
up the servos to the receiver is that the
connectors can be plugged in either way. You
won’t blow anything out when you reverse
them, but the servo or system, if it is the
power plug, won’t work. So when plugging
any connector into the Electron 6 receiver,
always make sure that the black wire faces
the outside of the case.
The antenna is a full-length approximately
40-inch wire. Keep in mind that this receiver
has six-channel-function capability, even
though the standard transmitter has only
three-channel function. More about this in a
moment.
The two servos supplied are Hitec HS-
81s, which are semimicroservos. They
measure 11⁄8 inches long x 11⁄8 inches high x
7⁄16 inch thick, less mounting flanges and
output arm. Each servo weighs 0.6 ounce
(17.1 grams). Rated output is an amazing 36
ounce-inches (at 4.8 volts), and the transit
time is a fast 0.11 second for 60° rotation.
My system came with a battery box and a
switch harness (no charging jack!). The box
holds four AAA alkaline cells. Hitec offers a
line of four-cell Ni-Cd battery packs to suit
all kinds of flying needs. If you do substitute
a rechargeable battery pack, make sure you
also purchase a switch harness with a
charging jack. Otherwise you will have to
unplug the pack every time you want to
charge it.
Add-On Options: Now we get to this Neon
system’s important new feature. After
purchasing the basic system (either model),
you can buy as many as four add-on options.
You can install these easily, and it will
require no soldering on your part. As I
mentioned, even the transmitter case has been
designed so that it can be opened without
screws or tools.
The four options are: trainer-cable
provisions, Adjustable Travel Volume
(ATV)—actually endpoint adjustment—of all
three basic channel functions, dual rate
control of the two primary flight-control
channels, and a fourth channel function that is
not proportional; instead, it is operated by a
three-position switch located on the
transmitter case’s top right rear corner.
Each option came packaged separately
with instructions and mounting hardware. The
installation instructions were thorough, but I
was disappointed because no application
information was supplied (such as, what is the
purpose of each option?). My understanding
is that information will be included before this
review is printed.
Be aware that two of the options are
interrelated. If you purchase the ATV, you
will be able to adjust the control throw
individually for each of the three channel
functions. The three small adjustment controls
are located on the transmitter’s front panel
just below the power switch.
Here is the trick. If you then buy the dual
rate option, you will learn that the single dualrate
switch turns the function on for CH-1
(rudder) and CH-2 (elevator) simultaneously.
When you want to adjust the amount of dualrate
cutback (control reduction), turn the dualrate
switch on, then use those same ATV
controls on the front panel.
However, keep in mind that the minute
you install the dual-rate switch, you lose the
regular ATV controls for those first two
channels. The ATV control for CH-3
(throttle) will continue to work as normal.
This slight limitation will be discussed in
more depth when the operations manual is
revised.
The trainer-cable jack and switch are
straightforward. If you want to use that
function, to join two Hitec transmitters for
training purposes, you will need to purchase
the cable from Hitec. If both Hitec
transmitters have the trainer jack, you will be
able to use the cable.
The last option provides a fourth channel
function that is operated by a three-position
switch. You could use this for deploying flaps
or spoilers on a sailplane, for operating a
retract landing-gear system, or for a bombdrop
release. The ATV does not cover the
fourth channel, but as I mentioned earlier, a
servo-reversing cable is provided.
When installing these options, be aware
that each item has its own cabling and
connectors. When you are finished installing
all four options, that’s a great deal of new
cabling that has been added inside your
transmitter.
As you can see in the photos, I dressed my
cable routing and used small nylon ties to
keep everything neat and in place. If you get
careless you might wrap a cable around the
control stick or a trim lever, so be careful.
The entire Neon FM three-channel system
and the add-on options worked well and
should be popular with beginners and sport
fliers. It will even find a home with many
sailplane or electric sailplane enthusiasts. Best
of all is the attractive selling price. MA
Manufacturer:
Hitec RCD
12115 Paine St.
Poway CA 92064
(858) 748-6948
www.hitecrcd.com
Edition: Model Aviation - 2003/09
Page Numbers: 45,46,47,48
Edition: Model Aviation - 2003/09
Page Numbers: 45,46,47,48
September 2003 45
YOU MAY HAVE already seen photos of
this new Hitec RCD Neon FM three-channel
Radio Control (RC) system in previous
installments of Model Aviation’s new “From
the Ground Up” beginners’ series.
A three-channel RC system can provide
the beginner with an excellent starting point.
These systems are usually the most simple to
operate, they provide more than enough
control functions, and the overall cost is held
to a minimum.
Hitec engineers have come up with an
even better idea: they have configured the
transmitter so that more advanced control
features can be added as you gain experience
in the hobby. You purchase a basic threechannel-
function system first, then you can
add as many as four additional control
options, which will increase the system’s
overall versatility. This engineering/marketing
concept makes for an attractive initial
purchase price.
Hitec Neon FM Systems: When you go to
purchase the basic system, you will learn that
two models, or variations, are available. The
transmitter in both is identical. Hitec stock
number 148721 is the more deluxe of the two
models. That is the system I am reviewing
here.
It is supplied with a rechargeable eight-cell
nickel-cadmium (Ni-Cd) battery pack located
inside the transmitter, a charger for that
battery, the Hitec Electron 6 receiver, two
Hitec HS-81 servos, a battery holder that
accommodates four AAA-size alkaline
(nonrechargeable) cells including a power
on/off switch, a frequency flag set, and an
instruction manual.
I particularly like this system because it
includes a rechargeable transmitter battery
pack and charger, and the fact that the
Electron 6 receiver is of dual-conversion
circuitry. This system would be suited for
glow-fuel-powered models ranging from .049
cubic-inch (cu. in.) displacement up to .15 or
.20 cu. in. size. With larger and more
powerful servos, you could fly models easily
with up to .40 cu. in. power.
On the other end of the scale, you could
fly park flyers or backyard flyers that average
6-10 ounces total weight. These small models
are almost always electric-powered. If you
choose a model of this type and size, you will
only need an Electronic Speed Control (ESC)
for the motor and a rechargeable battery that
is capable of operating the motor and the
radio system on a shared basis.
Almost all modern ESCs have this
Bob Aberle
P r o d u c t R e v i e w
Hitec RCD Neon Three-
Channel RC System
Pros:
• Attractive price
• System can be upgraded to four
channels when required.
Cons:
• Servo reversing is not as simple as it
could be.
System includes transmitter with rechargeable Ni-Cd battery pack, charger, Hitec Electron 6 receiver, two HS-81 servos.
46 MODEL AVIATION
“sharing” circuit known as a Battery Eliminator Circuit (BEC). So if
you do decide to fly a small electric-powered model, the motor-control
unit takes the place of that third (engine throttle) servo.
The other Neon system is identified as stock number 148722, which
Hitec calls its “micro” version. Although the same transmitter is
employed, this model does not come with rechargeable batteries. You
will have to purchase eight AA alkaline cells to operate the transmitter.
These cells generally provide at least 10 hours of operating time before
they need to be replaced.
The Hitec HFS-04MG single-conversion FM receiver is supplied,
as are two Hitec HS-55 submicroservos. The other items in the system
are identical to those in the deluxe model. This micro version is
intended for use with small RC models such as the park or backyard
flyers and the .049 cu. in. (referred to as Class 1⁄2A) glow-fuel-powered
aircraft.
This system will cost less because it does not have rechargeable
batteries or a charger, yet in the long run it can be upgraded easily to
the same status as the deluxe version. Best of all, the four optional
transmitter add-on features can be added to either system.
Neon Three-Channel FM Transmitter: The transmitter is available on
any of the 50 channels assigned by the Federal Communications
Commission between 72 and 73 MHz expressly for the control of
model aircraft.
This is an FM system and the deviation is on the low side (also
called negative shift), which means that this system is compatible with
other RC systems manufactured by Futaba, GWS, and FMA Direct.
As is typical with most three-channel transmitters, there is only one
dual-axis control-stick assembly, and it is located at the right side of the
case. This stick assembly is intended to control rudder/elevator or
aileron/elevator on your model.
Both channels have a mechanical-type (with ratchet) trim lever
surrounding the control stick. You basically hold the transmitter case
with your left hand while your right-hand fingers grip the single control
stick. The index finger of your left hand operates the third-channel
function control, which is a small lever located on the top rear portion
of the transmitter case.
This third channel function would probably be used to operate a
throttle control on a glow-fueled engine or the speed of an electric
motor. Unfortunately this third channel position does not have a trim
control.
Slightly left of center (on the case front) is the power on/off switch.
To the right of that are three colored light-emitting diodes (LEDs) that
show the status of your battery condition. When the green LED glows,
the battery is at or near full charge. The middle amber LED signifies
that you still have usable power, but it is a caution. You stop flying
when the red LED glows, then you must recharge your Ni-Cd batteries
or replace your alkaline batteries.
Directly above the power switch is an elevon mixing switch that
A close-up of the Electron 6 receiver and the two supplied HS-81
microservos that feature 36 ounce-inch output.
Note careful placement of left-hand thumb recess on front of
transmitter. Text has other control-function details.
With transmitter halves separated, you can see one cable that
involves third channel function running to rear case cover.
There are four add-on options available for this RC system, and
they are available separately when you are ready.
Photos courtesy the author
can be turned on or off. When it’s on, the
transmitter will automatically mix the
controls from the first two channels. This will
enable you to fly models with “V” tails
(ruddervators) or elevons, as is the case with
delta or flying-wing designs. It mixes or
integrates the two control functions. This
feature is supplied with the basic transmitter.
In case you are wondering about servoreversing
switches, the function is provided,
but it isn’t done with switches. The
transmitter case has been designed so that it
can be opened (or separated in halves)
without the need for tools. You slide out the
two bottom latches, remove the crystal and its
holder, pull off the plastic antenna base, and
the case opens.
Inside you will be directed to four
separate cables—one for each channel
function (the fourth if you add that option!).
To reverse the servo direction, unplug the
particular cable, rotate the connector 180°,
plug it back in, and the servo is reversed.
While you have the transmitter open, you can
adjust the control stick’s spring tension (stick
length is adjustable from the outside!).
On one side of the transmitter case you
will find the battery-charging jack. A
standard Hitec dual-output-system charger is
supplied with the deluxe version of this
system, as is an eight-cell, 600 mAh-capacity
Ni-Cd battery pack.
The charging jack in this circuit contains a
protective diode. As such, battery voltage is
unavailable at the jack for testing purposes. If
you want to discharge-test your battery, to
determine the actual capacity, you will have
to open the case and physically remove the
pack. Hitec cautions you not to use a fieldtype
peak-detect charger on this transmitter
since the higher current might burn out the
diode and open the battery circuit.
Neon Deluxe System Airborne Components:
The popular new Hitec Electron 6 dualconversion
FM receiver is supplied with the
deluxe system. This is a relatively small and
lightweight unit measuring 13⁄4 inches long x
7⁄8 inch wide x 9⁄16 inch thick (with a crystal
projection of an additional 5⁄16 inch). Weight
on my digital scale is 0.64 ounce (18.2
grams). That weight could be further reduced
by carefully removing the molded plastic
case.
One thing I learned the first time I hooked
up the servos to the receiver is that the
connectors can be plugged in either way. You
won’t blow anything out when you reverse
them, but the servo or system, if it is the
power plug, won’t work. So when plugging
any connector into the Electron 6 receiver,
always make sure that the black wire faces
the outside of the case.
The antenna is a full-length approximately
40-inch wire. Keep in mind that this receiver
has six-channel-function capability, even
though the standard transmitter has only
three-channel function. More about this in a
moment.
The two servos supplied are Hitec HS-
81s, which are semimicroservos. They
measure 11⁄8 inches long x 11⁄8 inches high x
7⁄16 inch thick, less mounting flanges and
output arm. Each servo weighs 0.6 ounce
(17.1 grams). Rated output is an amazing 36
ounce-inches (at 4.8 volts), and the transit
time is a fast 0.11 second for 60° rotation.
My system came with a battery box and a
switch harness (no charging jack!). The box
holds four AAA alkaline cells. Hitec offers a
line of four-cell Ni-Cd battery packs to suit
all kinds of flying needs. If you do substitute
a rechargeable battery pack, make sure you
also purchase a switch harness with a
charging jack. Otherwise you will have to
unplug the pack every time you want to
charge it.
Add-On Options: Now we get to this Neon
system’s important new feature. After
purchasing the basic system (either model),
you can buy as many as four add-on options.
You can install these easily, and it will
require no soldering on your part. As I
mentioned, even the transmitter case has been
designed so that it can be opened without
screws or tools.
The four options are: trainer-cable
provisions, Adjustable Travel Volume
(ATV)—actually endpoint adjustment—of all
three basic channel functions, dual rate
control of the two primary flight-control
channels, and a fourth channel function that is
not proportional; instead, it is operated by a
three-position switch located on the
transmitter case’s top right rear corner.
Each option came packaged separately
with instructions and mounting hardware. The
installation instructions were thorough, but I
was disappointed because no application
information was supplied (such as, what is the
purpose of each option?). My understanding
is that information will be included before this
review is printed.
Be aware that two of the options are
interrelated. If you purchase the ATV, you
will be able to adjust the control throw
individually for each of the three channel
functions. The three small adjustment controls
are located on the transmitter’s front panel
just below the power switch.
Here is the trick. If you then buy the dual
rate option, you will learn that the single dualrate
switch turns the function on for CH-1
(rudder) and CH-2 (elevator) simultaneously.
When you want to adjust the amount of dualrate
cutback (control reduction), turn the dualrate
switch on, then use those same ATV
controls on the front panel.
However, keep in mind that the minute
you install the dual-rate switch, you lose the
regular ATV controls for those first two
channels. The ATV control for CH-3
(throttle) will continue to work as normal.
This slight limitation will be discussed in
more depth when the operations manual is
revised.
The trainer-cable jack and switch are
straightforward. If you want to use that
function, to join two Hitec transmitters for
training purposes, you will need to purchase
the cable from Hitec. If both Hitec
transmitters have the trainer jack, you will be
able to use the cable.
The last option provides a fourth channel
function that is operated by a three-position
switch. You could use this for deploying flaps
or spoilers on a sailplane, for operating a
retract landing-gear system, or for a bombdrop
release. The ATV does not cover the
fourth channel, but as I mentioned earlier, a
servo-reversing cable is provided.
When installing these options, be aware
that each item has its own cabling and
connectors. When you are finished installing
all four options, that’s a great deal of new
cabling that has been added inside your
transmitter.
As you can see in the photos, I dressed my
cable routing and used small nylon ties to
keep everything neat and in place. If you get
careless you might wrap a cable around the
control stick or a trim lever, so be careful.
The entire Neon FM three-channel system
and the add-on options worked well and
should be popular with beginners and sport
fliers. It will even find a home with many
sailplane or electric sailplane enthusiasts. Best
of all is the attractive selling price. MA
Manufacturer:
Hitec RCD
12115 Paine St.
Poway CA 92064
(858) 748-6948
www.hitecrcd.com
Edition: Model Aviation - 2003/09
Page Numbers: 45,46,47,48
September 2003 45
YOU MAY HAVE already seen photos of
this new Hitec RCD Neon FM three-channel
Radio Control (RC) system in previous
installments of Model Aviation’s new “From
the Ground Up” beginners’ series.
A three-channel RC system can provide
the beginner with an excellent starting point.
These systems are usually the most simple to
operate, they provide more than enough
control functions, and the overall cost is held
to a minimum.
Hitec engineers have come up with an
even better idea: they have configured the
transmitter so that more advanced control
features can be added as you gain experience
in the hobby. You purchase a basic threechannel-
function system first, then you can
add as many as four additional control
options, which will increase the system’s
overall versatility. This engineering/marketing
concept makes for an attractive initial
purchase price.
Hitec Neon FM Systems: When you go to
purchase the basic system, you will learn that
two models, or variations, are available. The
transmitter in both is identical. Hitec stock
number 148721 is the more deluxe of the two
models. That is the system I am reviewing
here.
It is supplied with a rechargeable eight-cell
nickel-cadmium (Ni-Cd) battery pack located
inside the transmitter, a charger for that
battery, the Hitec Electron 6 receiver, two
Hitec HS-81 servos, a battery holder that
accommodates four AAA-size alkaline
(nonrechargeable) cells including a power
on/off switch, a frequency flag set, and an
instruction manual.
I particularly like this system because it
includes a rechargeable transmitter battery
pack and charger, and the fact that the
Electron 6 receiver is of dual-conversion
circuitry. This system would be suited for
glow-fuel-powered models ranging from .049
cubic-inch (cu. in.) displacement up to .15 or
.20 cu. in. size. With larger and more
powerful servos, you could fly models easily
with up to .40 cu. in. power.
On the other end of the scale, you could
fly park flyers or backyard flyers that average
6-10 ounces total weight. These small models
are almost always electric-powered. If you
choose a model of this type and size, you will
only need an Electronic Speed Control (ESC)
for the motor and a rechargeable battery that
is capable of operating the motor and the
radio system on a shared basis.
Almost all modern ESCs have this
Bob Aberle
P r o d u c t R e v i e w
Hitec RCD Neon Three-
Channel RC System
Pros:
• Attractive price
• System can be upgraded to four
channels when required.
Cons:
• Servo reversing is not as simple as it
could be.
System includes transmitter with rechargeable Ni-Cd battery pack, charger, Hitec Electron 6 receiver, two HS-81 servos.
46 MODEL AVIATION
“sharing” circuit known as a Battery Eliminator Circuit (BEC). So if
you do decide to fly a small electric-powered model, the motor-control
unit takes the place of that third (engine throttle) servo.
The other Neon system is identified as stock number 148722, which
Hitec calls its “micro” version. Although the same transmitter is
employed, this model does not come with rechargeable batteries. You
will have to purchase eight AA alkaline cells to operate the transmitter.
These cells generally provide at least 10 hours of operating time before
they need to be replaced.
The Hitec HFS-04MG single-conversion FM receiver is supplied,
as are two Hitec HS-55 submicroservos. The other items in the system
are identical to those in the deluxe model. This micro version is
intended for use with small RC models such as the park or backyard
flyers and the .049 cu. in. (referred to as Class 1⁄2A) glow-fuel-powered
aircraft.
This system will cost less because it does not have rechargeable
batteries or a charger, yet in the long run it can be upgraded easily to
the same status as the deluxe version. Best of all, the four optional
transmitter add-on features can be added to either system.
Neon Three-Channel FM Transmitter: The transmitter is available on
any of the 50 channels assigned by the Federal Communications
Commission between 72 and 73 MHz expressly for the control of
model aircraft.
This is an FM system and the deviation is on the low side (also
called negative shift), which means that this system is compatible with
other RC systems manufactured by Futaba, GWS, and FMA Direct.
As is typical with most three-channel transmitters, there is only one
dual-axis control-stick assembly, and it is located at the right side of the
case. This stick assembly is intended to control rudder/elevator or
aileron/elevator on your model.
Both channels have a mechanical-type (with ratchet) trim lever
surrounding the control stick. You basically hold the transmitter case
with your left hand while your right-hand fingers grip the single control
stick. The index finger of your left hand operates the third-channel
function control, which is a small lever located on the top rear portion
of the transmitter case.
This third channel function would probably be used to operate a
throttle control on a glow-fueled engine or the speed of an electric
motor. Unfortunately this third channel position does not have a trim
control.
Slightly left of center (on the case front) is the power on/off switch.
To the right of that are three colored light-emitting diodes (LEDs) that
show the status of your battery condition. When the green LED glows,
the battery is at or near full charge. The middle amber LED signifies
that you still have usable power, but it is a caution. You stop flying
when the red LED glows, then you must recharge your Ni-Cd batteries
or replace your alkaline batteries.
Directly above the power switch is an elevon mixing switch that
A close-up of the Electron 6 receiver and the two supplied HS-81
microservos that feature 36 ounce-inch output.
Note careful placement of left-hand thumb recess on front of
transmitter. Text has other control-function details.
With transmitter halves separated, you can see one cable that
involves third channel function running to rear case cover.
There are four add-on options available for this RC system, and
they are available separately when you are ready.
Photos courtesy the author
can be turned on or off. When it’s on, the
transmitter will automatically mix the
controls from the first two channels. This will
enable you to fly models with “V” tails
(ruddervators) or elevons, as is the case with
delta or flying-wing designs. It mixes or
integrates the two control functions. This
feature is supplied with the basic transmitter.
In case you are wondering about servoreversing
switches, the function is provided,
but it isn’t done with switches. The
transmitter case has been designed so that it
can be opened (or separated in halves)
without the need for tools. You slide out the
two bottom latches, remove the crystal and its
holder, pull off the plastic antenna base, and
the case opens.
Inside you will be directed to four
separate cables—one for each channel
function (the fourth if you add that option!).
To reverse the servo direction, unplug the
particular cable, rotate the connector 180°,
plug it back in, and the servo is reversed.
While you have the transmitter open, you can
adjust the control stick’s spring tension (stick
length is adjustable from the outside!).
On one side of the transmitter case you
will find the battery-charging jack. A
standard Hitec dual-output-system charger is
supplied with the deluxe version of this
system, as is an eight-cell, 600 mAh-capacity
Ni-Cd battery pack.
The charging jack in this circuit contains a
protective diode. As such, battery voltage is
unavailable at the jack for testing purposes. If
you want to discharge-test your battery, to
determine the actual capacity, you will have
to open the case and physically remove the
pack. Hitec cautions you not to use a fieldtype
peak-detect charger on this transmitter
since the higher current might burn out the
diode and open the battery circuit.
Neon Deluxe System Airborne Components:
The popular new Hitec Electron 6 dualconversion
FM receiver is supplied with the
deluxe system. This is a relatively small and
lightweight unit measuring 13⁄4 inches long x
7⁄8 inch wide x 9⁄16 inch thick (with a crystal
projection of an additional 5⁄16 inch). Weight
on my digital scale is 0.64 ounce (18.2
grams). That weight could be further reduced
by carefully removing the molded plastic
case.
One thing I learned the first time I hooked
up the servos to the receiver is that the
connectors can be plugged in either way. You
won’t blow anything out when you reverse
them, but the servo or system, if it is the
power plug, won’t work. So when plugging
any connector into the Electron 6 receiver,
always make sure that the black wire faces
the outside of the case.
The antenna is a full-length approximately
40-inch wire. Keep in mind that this receiver
has six-channel-function capability, even
though the standard transmitter has only
three-channel function. More about this in a
moment.
The two servos supplied are Hitec HS-
81s, which are semimicroservos. They
measure 11⁄8 inches long x 11⁄8 inches high x
7⁄16 inch thick, less mounting flanges and
output arm. Each servo weighs 0.6 ounce
(17.1 grams). Rated output is an amazing 36
ounce-inches (at 4.8 volts), and the transit
time is a fast 0.11 second for 60° rotation.
My system came with a battery box and a
switch harness (no charging jack!). The box
holds four AAA alkaline cells. Hitec offers a
line of four-cell Ni-Cd battery packs to suit
all kinds of flying needs. If you do substitute
a rechargeable battery pack, make sure you
also purchase a switch harness with a
charging jack. Otherwise you will have to
unplug the pack every time you want to
charge it.
Add-On Options: Now we get to this Neon
system’s important new feature. After
purchasing the basic system (either model),
you can buy as many as four add-on options.
You can install these easily, and it will
require no soldering on your part. As I
mentioned, even the transmitter case has been
designed so that it can be opened without
screws or tools.
The four options are: trainer-cable
provisions, Adjustable Travel Volume
(ATV)—actually endpoint adjustment—of all
three basic channel functions, dual rate
control of the two primary flight-control
channels, and a fourth channel function that is
not proportional; instead, it is operated by a
three-position switch located on the
transmitter case’s top right rear corner.
Each option came packaged separately
with instructions and mounting hardware. The
installation instructions were thorough, but I
was disappointed because no application
information was supplied (such as, what is the
purpose of each option?). My understanding
is that information will be included before this
review is printed.
Be aware that two of the options are
interrelated. If you purchase the ATV, you
will be able to adjust the control throw
individually for each of the three channel
functions. The three small adjustment controls
are located on the transmitter’s front panel
just below the power switch.
Here is the trick. If you then buy the dual
rate option, you will learn that the single dualrate
switch turns the function on for CH-1
(rudder) and CH-2 (elevator) simultaneously.
When you want to adjust the amount of dualrate
cutback (control reduction), turn the dualrate
switch on, then use those same ATV
controls on the front panel.
However, keep in mind that the minute
you install the dual-rate switch, you lose the
regular ATV controls for those first two
channels. The ATV control for CH-3
(throttle) will continue to work as normal.
This slight limitation will be discussed in
more depth when the operations manual is
revised.
The trainer-cable jack and switch are
straightforward. If you want to use that
function, to join two Hitec transmitters for
training purposes, you will need to purchase
the cable from Hitec. If both Hitec
transmitters have the trainer jack, you will be
able to use the cable.
The last option provides a fourth channel
function that is operated by a three-position
switch. You could use this for deploying flaps
or spoilers on a sailplane, for operating a
retract landing-gear system, or for a bombdrop
release. The ATV does not cover the
fourth channel, but as I mentioned earlier, a
servo-reversing cable is provided.
When installing these options, be aware
that each item has its own cabling and
connectors. When you are finished installing
all four options, that’s a great deal of new
cabling that has been added inside your
transmitter.
As you can see in the photos, I dressed my
cable routing and used small nylon ties to
keep everything neat and in place. If you get
careless you might wrap a cable around the
control stick or a trim lever, so be careful.
The entire Neon FM three-channel system
and the add-on options worked well and
should be popular with beginners and sport
fliers. It will even find a home with many
sailplane or electric sailplane enthusiasts. Best
of all is the attractive selling price. MA
Manufacturer:
Hitec RCD
12115 Paine St.
Poway CA 92064
(858) 748-6948
www.hitecrcd.com
Edition: Model Aviation - 2003/09
Page Numbers: 45,46,47,48
September 2003 45
YOU MAY HAVE already seen photos of
this new Hitec RCD Neon FM three-channel
Radio Control (RC) system in previous
installments of Model Aviation’s new “From
the Ground Up” beginners’ series.
A three-channel RC system can provide
the beginner with an excellent starting point.
These systems are usually the most simple to
operate, they provide more than enough
control functions, and the overall cost is held
to a minimum.
Hitec engineers have come up with an
even better idea: they have configured the
transmitter so that more advanced control
features can be added as you gain experience
in the hobby. You purchase a basic threechannel-
function system first, then you can
add as many as four additional control
options, which will increase the system’s
overall versatility. This engineering/marketing
concept makes for an attractive initial
purchase price.
Hitec Neon FM Systems: When you go to
purchase the basic system, you will learn that
two models, or variations, are available. The
transmitter in both is identical. Hitec stock
number 148721 is the more deluxe of the two
models. That is the system I am reviewing
here.
It is supplied with a rechargeable eight-cell
nickel-cadmium (Ni-Cd) battery pack located
inside the transmitter, a charger for that
battery, the Hitec Electron 6 receiver, two
Hitec HS-81 servos, a battery holder that
accommodates four AAA-size alkaline
(nonrechargeable) cells including a power
on/off switch, a frequency flag set, and an
instruction manual.
I particularly like this system because it
includes a rechargeable transmitter battery
pack and charger, and the fact that the
Electron 6 receiver is of dual-conversion
circuitry. This system would be suited for
glow-fuel-powered models ranging from .049
cubic-inch (cu. in.) displacement up to .15 or
.20 cu. in. size. With larger and more
powerful servos, you could fly models easily
with up to .40 cu. in. power.
On the other end of the scale, you could
fly park flyers or backyard flyers that average
6-10 ounces total weight. These small models
are almost always electric-powered. If you
choose a model of this type and size, you will
only need an Electronic Speed Control (ESC)
for the motor and a rechargeable battery that
is capable of operating the motor and the
radio system on a shared basis.
Almost all modern ESCs have this
Bob Aberle
P r o d u c t R e v i e w
Hitec RCD Neon Three-
Channel RC System
Pros:
• Attractive price
• System can be upgraded to four
channels when required.
Cons:
• Servo reversing is not as simple as it
could be.
System includes transmitter with rechargeable Ni-Cd battery pack, charger, Hitec Electron 6 receiver, two HS-81 servos.
46 MODEL AVIATION
“sharing” circuit known as a Battery Eliminator Circuit (BEC). So if
you do decide to fly a small electric-powered model, the motor-control
unit takes the place of that third (engine throttle) servo.
The other Neon system is identified as stock number 148722, which
Hitec calls its “micro” version. Although the same transmitter is
employed, this model does not come with rechargeable batteries. You
will have to purchase eight AA alkaline cells to operate the transmitter.
These cells generally provide at least 10 hours of operating time before
they need to be replaced.
The Hitec HFS-04MG single-conversion FM receiver is supplied,
as are two Hitec HS-55 submicroservos. The other items in the system
are identical to those in the deluxe model. This micro version is
intended for use with small RC models such as the park or backyard
flyers and the .049 cu. in. (referred to as Class 1⁄2A) glow-fuel-powered
aircraft.
This system will cost less because it does not have rechargeable
batteries or a charger, yet in the long run it can be upgraded easily to
the same status as the deluxe version. Best of all, the four optional
transmitter add-on features can be added to either system.
Neon Three-Channel FM Transmitter: The transmitter is available on
any of the 50 channels assigned by the Federal Communications
Commission between 72 and 73 MHz expressly for the control of
model aircraft.
This is an FM system and the deviation is on the low side (also
called negative shift), which means that this system is compatible with
other RC systems manufactured by Futaba, GWS, and FMA Direct.
As is typical with most three-channel transmitters, there is only one
dual-axis control-stick assembly, and it is located at the right side of the
case. This stick assembly is intended to control rudder/elevator or
aileron/elevator on your model.
Both channels have a mechanical-type (with ratchet) trim lever
surrounding the control stick. You basically hold the transmitter case
with your left hand while your right-hand fingers grip the single control
stick. The index finger of your left hand operates the third-channel
function control, which is a small lever located on the top rear portion
of the transmitter case.
This third channel function would probably be used to operate a
throttle control on a glow-fueled engine or the speed of an electric
motor. Unfortunately this third channel position does not have a trim
control.
Slightly left of center (on the case front) is the power on/off switch.
To the right of that are three colored light-emitting diodes (LEDs) that
show the status of your battery condition. When the green LED glows,
the battery is at or near full charge. The middle amber LED signifies
that you still have usable power, but it is a caution. You stop flying
when the red LED glows, then you must recharge your Ni-Cd batteries
or replace your alkaline batteries.
Directly above the power switch is an elevon mixing switch that
A close-up of the Electron 6 receiver and the two supplied HS-81
microservos that feature 36 ounce-inch output.
Note careful placement of left-hand thumb recess on front of
transmitter. Text has other control-function details.
With transmitter halves separated, you can see one cable that
involves third channel function running to rear case cover.
There are four add-on options available for this RC system, and
they are available separately when you are ready.
Photos courtesy the author
can be turned on or off. When it’s on, the
transmitter will automatically mix the
controls from the first two channels. This will
enable you to fly models with “V” tails
(ruddervators) or elevons, as is the case with
delta or flying-wing designs. It mixes or
integrates the two control functions. This
feature is supplied with the basic transmitter.
In case you are wondering about servoreversing
switches, the function is provided,
but it isn’t done with switches. The
transmitter case has been designed so that it
can be opened (or separated in halves)
without the need for tools. You slide out the
two bottom latches, remove the crystal and its
holder, pull off the plastic antenna base, and
the case opens.
Inside you will be directed to four
separate cables—one for each channel
function (the fourth if you add that option!).
To reverse the servo direction, unplug the
particular cable, rotate the connector 180°,
plug it back in, and the servo is reversed.
While you have the transmitter open, you can
adjust the control stick’s spring tension (stick
length is adjustable from the outside!).
On one side of the transmitter case you
will find the battery-charging jack. A
standard Hitec dual-output-system charger is
supplied with the deluxe version of this
system, as is an eight-cell, 600 mAh-capacity
Ni-Cd battery pack.
The charging jack in this circuit contains a
protective diode. As such, battery voltage is
unavailable at the jack for testing purposes. If
you want to discharge-test your battery, to
determine the actual capacity, you will have
to open the case and physically remove the
pack. Hitec cautions you not to use a fieldtype
peak-detect charger on this transmitter
since the higher current might burn out the
diode and open the battery circuit.
Neon Deluxe System Airborne Components:
The popular new Hitec Electron 6 dualconversion
FM receiver is supplied with the
deluxe system. This is a relatively small and
lightweight unit measuring 13⁄4 inches long x
7⁄8 inch wide x 9⁄16 inch thick (with a crystal
projection of an additional 5⁄16 inch). Weight
on my digital scale is 0.64 ounce (18.2
grams). That weight could be further reduced
by carefully removing the molded plastic
case.
One thing I learned the first time I hooked
up the servos to the receiver is that the
connectors can be plugged in either way. You
won’t blow anything out when you reverse
them, but the servo or system, if it is the
power plug, won’t work. So when plugging
any connector into the Electron 6 receiver,
always make sure that the black wire faces
the outside of the case.
The antenna is a full-length approximately
40-inch wire. Keep in mind that this receiver
has six-channel-function capability, even
though the standard transmitter has only
three-channel function. More about this in a
moment.
The two servos supplied are Hitec HS-
81s, which are semimicroservos. They
measure 11⁄8 inches long x 11⁄8 inches high x
7⁄16 inch thick, less mounting flanges and
output arm. Each servo weighs 0.6 ounce
(17.1 grams). Rated output is an amazing 36
ounce-inches (at 4.8 volts), and the transit
time is a fast 0.11 second for 60° rotation.
My system came with a battery box and a
switch harness (no charging jack!). The box
holds four AAA alkaline cells. Hitec offers a
line of four-cell Ni-Cd battery packs to suit
all kinds of flying needs. If you do substitute
a rechargeable battery pack, make sure you
also purchase a switch harness with a
charging jack. Otherwise you will have to
unplug the pack every time you want to
charge it.
Add-On Options: Now we get to this Neon
system’s important new feature. After
purchasing the basic system (either model),
you can buy as many as four add-on options.
You can install these easily, and it will
require no soldering on your part. As I
mentioned, even the transmitter case has been
designed so that it can be opened without
screws or tools.
The four options are: trainer-cable
provisions, Adjustable Travel Volume
(ATV)—actually endpoint adjustment—of all
three basic channel functions, dual rate
control of the two primary flight-control
channels, and a fourth channel function that is
not proportional; instead, it is operated by a
three-position switch located on the
transmitter case’s top right rear corner.
Each option came packaged separately
with instructions and mounting hardware. The
installation instructions were thorough, but I
was disappointed because no application
information was supplied (such as, what is the
purpose of each option?). My understanding
is that information will be included before this
review is printed.
Be aware that two of the options are
interrelated. If you purchase the ATV, you
will be able to adjust the control throw
individually for each of the three channel
functions. The three small adjustment controls
are located on the transmitter’s front panel
just below the power switch.
Here is the trick. If you then buy the dual
rate option, you will learn that the single dualrate
switch turns the function on for CH-1
(rudder) and CH-2 (elevator) simultaneously.
When you want to adjust the amount of dualrate
cutback (control reduction), turn the dualrate
switch on, then use those same ATV
controls on the front panel.
However, keep in mind that the minute
you install the dual-rate switch, you lose the
regular ATV controls for those first two
channels. The ATV control for CH-3
(throttle) will continue to work as normal.
This slight limitation will be discussed in
more depth when the operations manual is
revised.
The trainer-cable jack and switch are
straightforward. If you want to use that
function, to join two Hitec transmitters for
training purposes, you will need to purchase
the cable from Hitec. If both Hitec
transmitters have the trainer jack, you will be
able to use the cable.
The last option provides a fourth channel
function that is operated by a three-position
switch. You could use this for deploying flaps
or spoilers on a sailplane, for operating a
retract landing-gear system, or for a bombdrop
release. The ATV does not cover the
fourth channel, but as I mentioned earlier, a
servo-reversing cable is provided.
When installing these options, be aware
that each item has its own cabling and
connectors. When you are finished installing
all four options, that’s a great deal of new
cabling that has been added inside your
transmitter.
As you can see in the photos, I dressed my
cable routing and used small nylon ties to
keep everything neat and in place. If you get
careless you might wrap a cable around the
control stick or a trim lever, so be careful.
The entire Neon FM three-channel system
and the add-on options worked well and
should be popular with beginners and sport
fliers. It will even find a home with many
sailplane or electric sailplane enthusiasts. Best
of all is the attractive selling price. MA
Manufacturer:
Hitec RCD
12115 Paine St.
Poway CA 92064
(858) 748-6948
www.hitecrcd.com
