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HelicopterVario Sky Fox - Benzin - Evolution - Xtreme › help needed for eCCPM setup
01-24-2007 07:04 PM  10 years agoPost 1
terje

rrApprentice

Mysen, Norway

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Hi,
I'm finished building my new Vario Acrobatic.
BUT, what's left is the 4 servo 90 degree eCCPM setup, which I'm not familiar with in any way.
I desperatly need some help on this.

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01-24-2007 07:44 PM  10 years agoPost 2
Notar

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Taxachussetts

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What radio do you have?
Joe

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01-24-2007 08:13 PM  10 years agoPost 3
terje

rrApprentice

Mysen, Norway

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I have a Graupner mc22. I think can handle the radio setup, for now I'm more confused with the mechanics. It looks to me as if the swash should move to the opposite direction of the heli. Is this correct?
Also, it it seems that when the blade grips point along the axis I want the heli to tilt, they have the least pitch change. I would have thought that with the blades pointing along the heli, an elevator input would result in a pitch change?

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01-24-2007 08:20 PM  10 years agoPost 4
terje

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Mysen, Norway

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A thought just crossed my mind...
90 Degree swash.. -Would that mean that the swashplate movements are rotated 90 degrees when compared to a normal mechanical swash? -So that when I tilt the swash sideways the heli should move fore- or backwards?

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01-24-2007 08:37 PM  10 years agoPost 5
Notar

rrKey Veteran

Taxachussetts

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On 4 servo 90, you want the front of the swashplate and rear of the swashplate controlling elevator. On the left and right sides, you want that to control roll, or pitch axis.
When standing behind the heli, the servos are arranged this way;
On the right side, rear servo, is pointing outside the frames, and connects to the side of the swashplate, this servo is plugged into the collective channel, or number 1 on the rec. The servo in front of this on the right side is for the elevator, and faces in the frames to control the front of the swashplate.
On the left side rear, this servo points inside the frames, and controls the back of the swash and is the aux servo for elevator, usually channel 8. The front servo on the left is on the outside of the frames, and controls the side of the swash, and is plugged into the aileron channel.
By using servo reverse function in the radio, get all servos going the correct way for the collective pitch function on the helicopter, meaning up for positive pitch, and pull down for negative pitch.
Once these are going the correct way, try the forward/back cyclic on the transmitter, and see if it is going the correct way. When you give forward, the front servo pulls down, and the back servo pushes up. If this is reversed, go into the swash mixer where it shows the three percentages of pitch, ele, and ail, and reverse the percentage. Default is +60. Use the rotory knob to make them -60 degrees, and this reverses the FUNCTION, so that it now will go in the correct direction. Do the same with the roll. When you give right roll, or aileron, the left servo pushes up, and the right servo pulls down.
Hope this helps.
Joe

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01-24-2007 10:03 PM  10 years agoPost 6
cfranks

rrVeteran

Adelaide South Australia

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Terje,

I have a Benzin Trainer (similar mechs to the Acrobat) and the same MX-22 Tx. I can help if you still have problems.

Charles

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01-25-2007 05:37 PM  10 years agoPost 7
terje

rrApprentice

Mysen, Norway

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Cfranks, thanks for offering but the mysteries of the swash plate has been explained by Joe now, so that's no longer an issue.
-I wonder though, did you have to cut any of the link rods to the swash or head to get a proper pitch range? So far it seems to very little negative pitch and very much positive..

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01-27-2007 12:33 PM  10 years agoPost 8
cfranks

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Adelaide South Australia

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Terje, it's about 4 years since I built it so I can't remember. Take your time and set up as per the manual, everything horizontal at zero degrees and mid stick, you should get the pitch range symmetrical.

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01-27-2007 02:02 PM  10 years agoPost 9
terje

rrApprentice

Mysen, Norway

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Thanks Charles.
I'm at it now, and hope to be able to do a test hover on monday or tuesday.

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HelicopterVario Sky Fox - Benzin - Evolution - Xtreme › help needed for eCCPM setup
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