Viper 70 setup

[gvgregor]

I am a newbie. I just fnished putting my Viper 70 together, installed servos and other components. I use a SPEKTRUM DX7 system. I am not sure how to setup the swashplate variables and servo directions.
Is there any graohical instruction to how setup V70 with DX7?
Thanks,
Greg

[cme]

Hi gvgregor,
Nice easy way to do ccpm setup in RC Heli Magazine. If you are in the US I will copy the pages and fax to you. If not I will summarize for you. You can call as well. Let me know. I'm currently flying the v70 with the dx7.
Chris
www.cmehobbies.com

[gvgregor]

Hi Chris,
Thanks for quick reply. I live in US, I think we communicated before via email.
Could you please email me those pages? Maybe I can purchase that magazine?
Here is my emai addres: gvgregor@yahoo.com
Thanks,
Greg

[cme]

Hi Greg,
I just sent you an email. Let me know how it works for you
Chris

[gvgregor]

Thanks Chris. I will follow the instructions and will report my progress.
I set the receiver to 3 servos 120 and reset all servos to normal.
The rudder part is clear. Looking at the heli FROM FRONT I connected the servo that tilts the swashplate back and fort (rear linkage) to ELEVATOR channel.
The servo that moves the left linkage (facing the heli) of the swashplate is connected to AILERON channel and the rigth linkage servo is connected to PITCH (AUX1) channel. I assume that the swashplate should be in horizontal position when the throrttle stick is midway up (50% throttle).

[cme]

Thanks Chris. I will follow the instructions and will report my progress.
I set the receiver to 3 servos 120 and reset all servos to normal.
The rudder part is clear. Looking at the heli FROM FRONT I connected the servo that tilts the swashplate back and fort (rear linkage) to ELEVATOR channel.
The servo that moves the left linkage (facing the heli) of the swashplate is connected to AILERON channel and the rigth linkage servo is connected to PITCH (AUX1) channel. I assume that the swashplate should be in horizontal position when the throrttle stick is midway up (50% throttle).

Hi Greg,
Glad you were able to view the info. I still use this to set up ccpm. Once everything is set, right stick movement looking at the swash from the rear, as follows. Move to the right, the right side of the swash will dip down and the left will move up, the elevator will not move. when you push on the stick, the front of the swash will dip and the back will go up. When you move the throttle stick, all three servos will move together from bottom to top keeping the swash level. Hope this helps.
Chris

[cme]

Hi Greg,
Glad you were able to view the info. I still use this to set up ccpm. Once everything is set, right stick movement looking at the swash from the rear, as follows. Move to the right, the right side of the swash will dip down and the left will move up, the elevator will not move. when you push on the stick, the front of the swash will dip and the back will go up. When you move the throttle stick, all three servos will move together from bottom to top keeping the swash level. Hope this helps.
Chris

One more note. when the right stick is centered the swash should be level.

[gvgregor]

My transmitter's right stick is spring loaded and is always in center position. The lef stick is the one that stays stationary (trottle stick).
Is yours different?
According to a picture taken from MS composit manual, there are 2 modes. MODE 1 and MODE 2 for transmitter sticks. Mine is setup for MODE 2 so the right stick is assigned to ELEVATOR (up/down), Roll (left/right). The left stick is Trottle (up/down) and Rudder (lef/right).
Is that correct?

[cme]

My transmitter's right stick is spring loaded and is always in center position. The lef stick is the one that stays stationary (trottle stick).
Is yours different?
According to a picture taken from MS composit manual, there are 2 modes. MODE 1 and MODE 2 for transmitter sticks. Mine is setup for MODE 2 so the right stick is assigned to ELEVATOR (up/down), Roll (left/right). The left stick is Trottle (up/down) and Rudder (lef/right).
Is that correct?
greg,
your transmitter is the same as mine. when the right stick is in the center position, your swash should be horizontal. so everything you said above is identical to my radio.
thanks,
chris

[gvgregor]

Here is a picture of swashplate control in relatition to DX7's control sticks.

I hope the upload function worked.

[gvgregor]

Chris,
I think I got it righ this time. I just want to double check with you.
The swashplate is balanced when the power is turned on.
1) Movinig the left stick (trottle) up, my swashplate moves up parallel and it moves down parallel when I move the stick down.
2) Moving the right stick up the front side of SP tilts up and when I move the stick down, SP front tilts down (pivots around Y-axis , where x-axis is parallel to boom pipe)
3) Left stick moved left or right, it behaves just like you described it in your last posting (SP pivots around x-axis).
Greg

[cme]

Chris,
I think I got it righ this time. I just want to double check with you.
The swashplate is balanced when the power is turned on.
1) Movinig the left stick (trottle) up, my swashplate moves up parallel and it moves down parallel when I move the stick down.
2) Moving the right stick up the front side of SP tilts up and when I move the stick down, SP front tilts down (pivots around Y-axis , where x-axis is parallel to boom pipe)
3) Left stick moved left or right, it behaves just like you described it in your last posting (SP pivots around x-axis).
Greg
Hi Greg,
You are almost there. The swash needs to tilt forward when you move you right stick toward the top of the radio. That means the front of the swash will dip (move down) the back of the swash will move up. When you pull back on the stick, the back of the swash will dip and the front will come up.
This translates into , If you were hovering tail towards you and you pulled back on the rightstick, the helicopter would start to come towards you tail first. If you pushed on the right stick, the helicopter would move away. If you moved the right stick to the right the helicopter would start to bank right.
Hope this helps.
Chris

[gvgregor]

Thanks,
I got it this time. I have to point to this link wich was very helpfull:
http://www.runryder.com/helicopter/t207156p1/.
The next step is to setup the profi gyro. I wish they had a reversing switch on it.
I mounted it upside down after sevral test thinking it is the right direction.
What are the settings on your transmitter in the GYRO page?
Here is mine:

GYRO SENSE: RUDD D/R

RATE:
0: 50%
1: 50%

Thanks

[cme]

Thanks,
I got it this time. I have to point to this link wich was very helpfull:
http://www.runryder.com/helicopter/t207156p1/.
The next step is to setup the profi gyro. I wish they had a reversing switch on it.
I mounted it upside down after sevral test thinking it is the right direction.
What are the settings on your transmitter in the GYRO page?
Here is mine:

GYRO SENSE: RUDD D/R

RATE:
0: 50%
1: 50%

Thanks

Hi Greg,
Are you flying. On all my helis, I do not use that method, When the gain is available throught the radio, i use ATV which on the spectrum recver it is the gear channel so when I have the gear sense off, I can bring my atvs on the gear. On the larger helis using CSM I usually start with 70 and with the smaller in this case using the profi micro gyro I started with 81 bothe Normal and heading hold . I'm at 75 in both settings with the viper 70. I rarely use the non heading hold function but keep it about the same.

[gvgregor]

Hi Chris,
First I had the GYRO in reverse so I turned around and thinks look better now.
My gyro gain is connected to GEAR. In one of Spektrum's menu called [INPUT SELECT] I selcted :
-----------------------
AUX2 GEAR
INH GYRO
---------------------------

In anther menu called [REVO MIX] all 4 variables are set to ZERO
--------------------------------------------------------------
The next menu
[GYRO SENSE]
AUTO F. MODE
NORM:0
RATE: STNT:0
0:50%
1:50%
-------------------------------------------------------------
Increasing the numbers in RATe column makes the RUDD to have latching effect so when I move the stick to right I see the rudder servo going in one direction but it latches and stays ther when I release the rudder stick. I comes back to normal when I reset the numbers to 50%.
I was able to lift the heli about 1/4 inch ( I was in the living room). This test conformed that servos are setup in correct sequence and direction.

[gvgregor]

Hi Chris,
First I had the GYRO in reverse so I turned around and thinks look better now.
My gyro gain is connected to GEAR. In one of Spektrum's menu called [INPUT SELECT] I selcted :
-----------------------
AUX2 GEAR
INH GYRO
---------------------------

In anther menu called [REVO MIX] all 4 variables are set to ZERO
--------------------------------------------------------------
The next menu
[GYRO SENSE]
AUTO F. MODE
NORM:0
RATE: STNT:0
0:50%
1:50%
-------------------------------------------------------------
Increasing the numbers in RATE column makes the RUDD to have latching effect so when I move the stick to right or left I see the rudder servo moving in one or oder direction but it latches and stays there when I release the rudder stick, but it comes back to normal when I reset the numbers to 50%.
I was able to lift the heli about 1/4 inch ( I was in the living room). This test conformed that servos are setup in correct sequence and direction.
It is such good feeling to see positive results after all this work.
All these wouldn't have been possible without your help, I am very greatfull for it and want to thank you.
Thanks,
Greg