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Zoom › Shogun and JR X-378 Setup
12-12-2004 12:46 PM  13 years agoPost 1
YBLee

rrNovice

Assonet, MA

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1. During the setup I had to reverse the servo throw in my X-378 transmitter to get the collective to move in the right direction. I've checked at servo position and wiring and didn't see any thing wrong. Is anyone else using this transmitter with the Shogun?

2. Is the -1 to -3 negative blade pitch set in mechanically or through the transmitter?

Thx in advance,

JR X-378
JR R610M Receiver
Hitec HS-56HB Servos
Cirrus MPG-6 Gyro

Lee, Assonet, MA

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12-12-2004 02:42 PM  13 years agoPost 2
copperclad

rrElite Veteran

NY

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hi
it's no problem to use a reversed channel , manufacturers use different channel positions on their tx's and rx's and it's common to have to >tweek< the settings like you have , and you can set up the pitch throws either way , mechanically or through the tx , i like to set it up mechanically and then use the tx to fine adjust as this will give you the best resolution , if you are a beginner i would recommend you use -3 ~ +7 on your pitch , as for hovering you will not use full negative and it will save you a boom strike if you slam the throttle down in an emergency

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12-12-2004 02:53 PM  13 years agoPost 3
BlakeMcBrayer

rrElite Veteran

Georgetown, Ky

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I'm using a JR 8103 and had to reverse a couple of channels myself. There is nothing wrong with having to reverse a channel. It all depends on what side of a control that the servo is mounted. If the collective servo were moved behind the main shaft, then it would not need to be reversed. Make sense?

As for pitch settings, they are mostly done in the radio. With your pitch curve set at 0-25-50-100, set you high and low end point (travel limits) so that you have full collective travel in both directs with no excessive travel that will bind the servo. After you set the end point to max travel, adjust your pitch curve so that you get the pitch range you want. There is not a magic set of numbers, they will vary from heli to heli. Make sure that at mid stick you have zero pitch. The midstick number is the 3 or middle number. As for the two numbers above and below midstick, adjust the outter number so that you get the total pitch you want, and average the 2nd and 4th number so that it creates a linear line between the number above and below.

These are only examples, not the final anwser in your situation:

Hovering pitch curve with very little negative and about 7 degress postive: 40-45-50-65-80. These curves will work with a throttle curve like 0-25-50-75-100 in normal mode.

3D pitch curve with equal postive and negative pitch of about 7 degrees: 80-65-50-65-80. The throttle curve for fixxed throttle mode would be something like 100-90-80-90-100 in idle up 1.

THESE ARE NOT the exact setting you will need by any means! They all vary, I'm just trying to help you picture how they work.

Don't come off the throttle untill you see your GOD!

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