Futaba 7CH Setup
Before activating the TJ, set up your heli with the pitch and throttle curves you would use under normal circumstances. This will ensure that should the sensor fail and the TJ reverts to transmitter throttle curves that the heli still behaves normally until a landing can be accomplished. Also ensure that this setup allows the heli to hover at your desired stick position (1/2 or ¾ as preferred) for each flight mode. The engine should be run-in and correct mixtures set.
This is a setup for TJ and RevMax. I use the Gyro channel and GYRO program
screen to get flight mode control.
Calibrate it on channel 5 with the GYRO screen mix INH.
With Channel 5 atv's at 95/95 and subtrim to 0% and Norm throttle curve set to 0,25,50,75,100,
calibrate unit.
Calibration:
Turn on TX and then RX and immediately flip the CH5 switch (down-up-down)
and you will get a rapid flashing green LED on the RevMax or TJPro. You are in cal mode. Move the throttle to high and you will see a yellow LED then move throttle to low for the green LED. Leave throttle at low stick now. Flip CH5 switch (up-down), Light goes out. It is calibrated :-)
After calibration, with the GYRO program set to the channel controlling the
governor(CH.5), set it to normal not "GY", assign "SW" to the idle-up
switch, and use the three travel volumes to program the governor to do
exactly the headspeeds you need.
Verify TJPro shutdown by putting throttle to half (Normal Flight mode) and
adjusting value on screen to between 45-55% and green light should go out
indicating disabled. Any value above that point is telling the TJPro or RevMax to be enabled.
Of course, one must now set the gyro gain using the regular end-points on the
channel the gyro aux is plugged in to, which would be channel 7. This no big deal because it's not like we mess with the gyro gain after it's set anyway.
Here is a setup technique for determining headspeed values using a tach.
RevMax Setup. (TJ setup below, but read this first)
For this example we are using a ¾ stick hover, which puts zero degrees pitch
at ½ stick and have selected the flight mode switch on GYRO screen for flight mode control.
It is best to have a helper on this, but it can be done alone. Just be very
careful and do not attempt it alone if it's windy or it just sounds crazy to
you.
Set GY screen to 50% for normal mode (UP). This disables TJ for next
actions.
Go to norm flight mode throttle curve screen and select mid-point of
throttle curve.
Using SkyTach, set tach display to read slightly higher than the highest
headspeed you want the TJ to limit. (1850 for this example)
Stand away from heli and spool up to 0 degree pitch setting. (1/2 stick)
Slowly increase mid-point throttle percentage until Tach and headspeed
match. (blades will appear to have stopped when you reach 1850 rpm)
Bring throttle back to low stick.
Now adjust Tach display to read the actual headspeed you want TJ to
limit.(1800)
On gyro screen adjust UP switch position (Normal Mode if switch E) value to
60% to enable TJ
Now spool heli up again to zero degrees, the headspeed should be
significantly lowered now because TJ is being enabled.(setting is above 50%)
Slowly increase the UP switch position value from 60% until blades appear
stopped (viewing through SkyTach) and that will be the value required for a
1800 rpm limit. You can now enter that value into either CENTER or DOWN for
the highest headspeed setting(Normally flight mode 2 or DOWN).
Now set SkyTach for second speed (lower) and repeat above steps but just
slowly decrease the value you have already for the UP switch position.
After this is done, re-enter starting value for Norm throttle curve
mid-point and you are done.
You can do above steps for a two position switch also and just leave one
position at 50% for disable and enter your found value from above method for
other switch position.
Setup for TJ govenors
Use the above method with the SkyTach with the exact head speed you want
selected versus a slightly higher head speed like above for the RevMax.
Instead of increasing the midpoint of your throttle curve you will re-enter
your normal flight mode curve values.
Select the UP switch position under the GYRO Menu and enter 50%.
Spool heli up to 0 degrees pitch throttle position.
Slowly increase the UP value from the 50% (TJ disabled) setting while in
normal mode. You will notice a rapid head speed decrease as soon as a value
over 53% is reached (this is TJ engaging).
While someone is viewing through tach, increase UP value until head speed
you set Tach at is reached. This is your high head speed so make note of
that value.
Reduce tach display to second head speed desired and then decrease UP value
on GYRO screen to attain the next head speed.
Now you have your values for the head speed's you want to maintain. Enter
them in to the corresponding flight condition switch position and go fly.
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