G 5 0 0 0 T
EXTREME TAIL LOCK
™
GYRO SYSTEM
I N S T R U C T I O N S
J R P G 5 0 0 0 T
For helicopter use only
For use with JR Super
or Digital Servos only
Revised 4/2000
F E AT U R E S
• E x t reme Tail Lock: The G5000T features both a normal “rate” mode, as well as an
“ e x t reme tail lock” mode. The 5000T’s extreme tail lock mode is designed to pro-
vide the 3D pilot with the highest perf o rmance heading hold system available.
• Outstanding Rate Mode: The G5000T’s design is based from the previous G3000,
which is known world over as the highest perf o rmance rate gyro ever pro d u c e d .
• M . P.C. (Multi Pulse Control) System: The high frequency output pulse of the G5000T
is three times faster than existing electronic gyros for unmatched perf o rm a n c e .
• Angular Velocity Command Control System: The G5000T’s Angular Ve l o c i t y
System creates an exceptionally constant pirouette rate, even in the most extre m e
wind conditions.
• Super Servo or Digital Servo Use: The G5000T is designed exclusively for JR’s
8700G Super or 8417 Digital Serv o s .
• Over Travel Limiter: P revents servo over- t r a v e l .
• O ffset Drift Canceling: C i rc u i t ry for superior neutral stability.
• Remote gain contr o l : P rovides remote adjustment of the gain values, as well as
access to rate and tail lock modes.
• Lightweight Piezo Sensor w/ D a m p e n i n g : New double action suspension dampen-
ing and lightweight Piezo crystal — total sensor weighs only 18 grams!
• Compatible with all JR, Futaba
®
, and other radio systems.
S P E C I F I C AT I O N S
Operating Voltage: 4.8V only
Operating Current: 50mA (not including serv o )
D i m e n s i o n s
G y ro Sensor: 32 x 30 x 36 mm
Amplifier: 38 x 19 x 53 mm
We i g h t
G y ro Sensor: 18 grams
Amplifier: 33 grams
Total Weight: 51 grams (1.8 oz)
I N T R O D U C T I O N
J R ’s new G5000T Extreme Tail Lock Gyro re p resents the very latest in both head-
ing hold and rate gyro technology. Based from JR’s outstanding G3000, the G5000T
incorporates the same contest winning rate gyro technology, while adding the new
“ e x t reme tail lock” heading hold mode. This new “tail lock” provides the 3D helicop-
ter pilot with a heading hold system that will allow the pilot to push both their flying
skills, as well as their equipment to the extre m e .
The G5000T, combined with JR’s 8700G Super Servo, offers superior “holding
power” in all conditions and is unequaled by any other gyro system. The G5000T’s
advanced M.P.C. (Multi Pulse Control) system has a high frequency output that
allows the G5000T to react up to three times faster than current Piezo gyro systems
on the market.
S E RVO SELECTION
J R ’s G5000T m u s t be used in conjunction with JR’s 8700G Super Servo or 8417
Digital servos. These servos feature an ultra-quick response and transit time, and
their total travel is specifically matched to give the best possible resolution when
used with the G5000T. These servos also feature special “alloy” servo gears
designed to handle the extreme torque loads that the G5000T can produce during
flight. It is not recommended that plastic geared servos be used, as these gears can
possibly fail during flight due to the extreme demands the G5000T.
HELICOPTER TAIL ROTOR SYSTEM
I m p o rtant: Because of the highly active/aggressive characteristics of this G5000T,
heavier than normal loads are placed on the tail rotor drive train. Take special note to
e n s u re that the main drive gear system and tail rotor gear box is in good working
o rder with the correct gear mesh and unworn teeth. Be sure it is properly gre a s e d
with all screws secured with Locktite
®
, etc.
On Miniature Aircraft X-Cell series of helicopters, a heavy-duty front tail rotor tune
up kit is recommended (part # MIN0832). When using the G5000T in a JR belt-driv-
en tail rotor helicopter such as the Ergo 60 or Vi g o r, it is recommended that the
optional JR aluminum tail pulleys be installed for maximum perf o rm a n c e
(JRP960322 front, JRP960323 rear). The use of aluminum pulleys will gre a t l y
reduce tail belt slippage as compared to the standard plastic pulleys. It is re c o m-
mended that the tail belt be checked after each flying session. If worn or missing
teeth are discovered, replace the tail belt as needed.
Please also note that due to the G5000T’s aggressive nature, the G5000T should
n o t be installed in a model that utilizes a “PIANO WIRE” tail drive system, as failure
can occur.
MAXIMIZING THE G5000T
N o t e : The G5000T Piezo gyro ’s operational features and functions are very diff e r-
ent from any other type of gyro. The adjustments, including travel adjust, exponen-
tial, dual rates, tail rotor compensation values, gain values, and endpoint limits will
be very diff e rent from your previous normal settings. Do not install the G5000T in
your helicopter using your current setup. The capabilities of this gyro are much
g reater; there f o re, the adjustment values will be diff e rent, and you must adjust them
c o rrectly to realize the system’s full potential.
C a refully read this instruction manual and be sure you fully understand and fol-
low each segment before your first flight.
I N S TA L L ATION
When deciding where to mount the gyro sensor, consider the criteria below:
Vibration
J R ’s G5000T is as much as 30 times more sensitive and responsive than other
g y ros. Because vibration is motion, the G5000T Gyro senses even minute vibrations
and acts upon them, sending the rudder servo an opposing command. For optimum
results, it’s imperative that your helicopter is as vibration-free as possible. All ro t a t-
ing components (e.g., main gear, head, tail ro t o r, blades, clutch, etc.) should be in
p e rfect balance. Equally important, the engine should run smoothly and consistently.
Spending the extra time to ensure that your machine is running perfectly will allow
the gyro gain to be turned up higher, more effectively holding the tail.
Temperatur e
The Piezo sensor is sensitive to drastic changes in temperature. Note that the
case features a matte chrome finish that is designed to reflect heat. When mounting
the gyro sensing unit, be sure that it is located away from the engine and exhaust
system so the heat does not transfer to the sensing unit. Also, when subjecting your
helicopter to temperature changes (e.g., going from your warm car to the cold out-
doors), allow the gyro ’s temperature to stabilize for about 10 minutes before flying.
Installing the Gyro Sensor
T h o roughly clean the bottom of the gyro sensor and the mounting area with ru b-
bing alcohol. Use one layer of the supplied double-sided tape to securely mount the
sensor in position.
N o t e : Do not use thick foam tape or multiply layers of double-sided tape as is
common practice with other gyros. The G5000T’s sensor is vibration/shock mounted
inside its case via a rubber/air dampening system, and no further vibration isolation
is necessary.
Installing the Amplifier
Using the 1/4” or thicker foam, wrap the amplifier and the receiver together, mak-
ing sure that at least one thickness of foam is between the receiver and amplifier.
Fasten the receiver and amplifier to the radio tray using rubber bands, making sure
they are securely held in place. If space restrictions don’t permit the amplifier and
receiver to be mounted together, wrap them individually in foam and mount each in
a convenient location. Use an optional servo extension lead if necessary.
C O N N E C T I O N S
Step 1: On the gyro amplifier, locate the lead marked “RU D D”. Connect this lead to
the rudder channel in the re c e i v e r.
Step 2: On the amplifier, locate the lead marked “AU X 3.” Note that it has a white
connector for identification. When using a JRPCM-10, 10S, 10SX, 10SXF or 10X
radio system, connect this lead to the Aux 3-channel in the re c e i v e r. For JR 8103
systems, connect this lead to the Aux 2-channel.
N o t e : When using this gyro with other radios like the JRXP652 the Aux 3 lead
must be connected to the appropriate channel — the one you use to alter the gain.
For example, if you want to use the gear switch to alter the gain, plug the Aux 3 lead
into the gear channel and use the travel adjust and sub-trim function to achieve the
d e s i red gain in both switch positions.
