Help on the 3400g

[magoo91h]

Ok, had a bad crash last week so decided to continue with the upgrade. I have a 401 gyro that was working with a DPS75 servo. I replace the dps75 with the 3400g.

The gyro seem to arm fine. while on the ground I and speed up the blade a little. I than give it some ruddder and it spins out of control. the stick will not move the rudder after this happen.

Can I get some help.

thanks

[ronbo422]

Reverse the REV-NOR switch on the gyro. Your gyro is compensating in the wrong direction. Mine did that too when I installed my 3400G.
Hope this helps.
~Ronbo

[LockMD]

Reverse the REV-NOR switch on the gyro. Your gyro is compensating in the wrong direction. Mine did that too when I installed my 3400G.
Hope this helps.
~Ronbo



What he said, I did it too ;)

[Heli Jim]

A quick note......when I changed my servo to the 3400G, I had to reverse the servo AND reverse the gyro so make sure that BOTH are working in the right direction. You can also set the gyro to the DS servo position because the 3400G is a true digital tail rotor servo.

[LockMD]

A quick note......when I changed my servo to the 3400G, I had to reverse the servo AND reverse the gyro so make sure that BOTH are working in the right direction. You can also set the gyro to the DS servo position because the 3400G is a true digital tail rotor servo.


And that too.... how do you guys remember EVERYTHING you've done? do you have a log/journal?

[Heli Jim]

No........just learning from one's own mistakes.

Things like that tend to stick in the mind.

Glad it helped you.

[magoo91h]

Ok I did those things. Now I can not get a steady red light on the G401. I changed between HH mode and it seems reversed.

Mike

[LockMD]

what do you have your gains set at? did you try flipping the gyro switch on the radio down up down up (quickly)?

[magoo91h]

more help.

I can not get this bird to stop spinning out of control . Help out there please

[GreenBar0n]

Is the tail rotor spinning in the right direction? The t/r blade should be turning towards the rear of the bird, or cutting up through the down draft of the main rotor.

[magoo91h]

Yes it is. I think I tried every possible setting like reversing gyro reversing rudder. I am about to throw it to get it to fly

[GreenBar0n]

So when you hold left stick left, the tail goes to the right correct?

[Heli Jim]

Turn on the TX and plug in the heli.
Turn ON the throttle hold so you don't get hit by a blade.

stand behind the heli and hold full right rudder
The blades should angle to the left and the trailing edge (back edge) of
the blades should be to the right
If it's the other way, then reverse the servo in the transmitter.

Now with the rudder stick centered (hands off) move the tail of the heli to your
right.....this simulates a left turn.....the gyro should move the tail blades just like
you did with the right rudder.....the trailing edge should be pointing to the right.

If they don't then you need to reverse the gyro.

It sounds like you have either the servo backwards, or the gyro backwards. Possibly both

[skigolfmike]

Before making your first flight, it will be necessary to confirm that the gyro is responding properly to the movements of the helicopter and providing proper inputs to the tail servo in order to counteract any unwanted changes in yaw. To do this, view the servo arm (from the top of the servo) and note the direction the arm rotates when you give a right rudder input on the transmitter (while the model remains motionless). In the case of the DS75H servo installed on your Blade 400 model, the servo arm should rotate toward the front of the helicopter. Then, yaw the nose of the helicopter quickly to the left, while again noting the direction the tail servo arm rotates. The arm should rotate in the same direction as it did for a right rudder command (toward the front of the helicopter). If the servo arm rotates in the opposite direction, switch the position of the Reverse switch located on the side of the gyro. The switch should be set to the Normal (NOR) position. Then, repeat the steps above to confirm that the gyro is now providing proper inputs to the tail servo.


If the servo arm goes the wrong way on stick input, reverse the servo in the TX . Do this first!

Then check the gyro per above.

WIDRTFM;)