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HelicopterBeginners Corner › pitch and throttle curve set up
11-29-2007 05:12 AM  10 years agoPost 1
sgtnam

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phila pa usa

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Hey guys, I,m some what of a newbie looking for some help setting up my radio. futaba 7c hirobo evo 30 size os 37 tuned pipe. the problem is that as of right now i,m set up -11/+11, but i just cant seem to get the throttle curve right, and i,m doing forward flight getting ready for the big 3D. ...........still looking for some help.

dave

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11-29-2007 01:09 PM  10 years agoPost 2
jbiter

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Sebring, FL

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Hi Dave,
Assuming your pitch curve is linear with zero at center and your mixture is set correctly, try the following. I have never tried the OS37 but I could not run 11 degrees of pitch without bogging the motor with my 32.

If I remember correctly, the Futaba 7C has a 5 point pitch and throttle curve. The way I adjust the throttle curve is to land the heli and move the throttle stick to the approx position for zero pitch. I then open the radio's throttle curve menu and adjust point 3 until I attain the head speed I wish to run. Be careful not to bump the collective while doing this.

I make a note of what the engine sounds like at zero and then fly the heli at 3/4 stick (point 4 on your throttle curve). I adjust point 4 until the engine sounds like it did at the zero position. You can be even more accurate if you have a buddy with an optical tach help you. If you are not comfortable with inverted flight yet, adjust point 2 to the same value you obtained for 4. It will be close enough. I leave points 1 and 5 at 100%

Jeff

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11-29-2007 05:43 PM  10 years agoPost 3
sgtnam

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phila pa usa

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Thank you very much for the reply Jeff that info helps a lot, im sort of learning on my own and didnt know how they set those darn throttle curves, but i think ive got it now, like they say in a twelve set program "Thanks for sharing" One more thing pertaining to the evo should i change the mixing arm positions on the seesaw for more mobility or leave it as it is.?

dave

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11-29-2007 07:38 PM  10 years agoPost 4
jbiter

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Sebring, FL

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Hi Dave,

Yes, if you are comfortable with FF and want to start doing some 3D, then high mobility is the way to go.

Jeff

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11-29-2007 08:58 PM  10 years agoPost 5
sgtnam

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phila pa usa

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ok thanks much jeff let you know how i made out take care.

dave

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12-02-2007 06:56 AM  10 years agoPost 6
sgtnam

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phila pa usa

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Hey Jeff how u doing thanks for the good info u gave the other day, just about put me in the clouds. But for real it was real good. The thing now is that the tail keeps hunting and gyro adjustment doesnt work just want to know what would be a good thing to try, oh I,m up to 1670 rpm in norm before take off, any help in sight?

dave

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12-02-2007 11:38 AM  10 years agoPost 7
jbiter

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Sebring, FL

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Hi Dave,

Glad to hear things are going well.

When you move the rudder stick to full travel either way, are you getting full travel out of your tail rotor pitch slider? If not try moving the ball out another hole on the servo horn or try a bigger horn. If the travel is a little too much, you can adjust the limit pot on the gyro itself. Leave the rudder ATV (end point) in your TX at 100 for now.

Another thing to try is to switch your gyro out of HH mode after boot up and try hovering with the gyro in rate mode with centered trims on TX and no subtrim. If the heli yaws left or right, land and adjust your rudder pushrod to mechanically adjust the T/R. After a couple of trials you should be able to get the heli to hover without a lot of yaw correction. Switch back to HH mode and try it out.

Those are a couple of thoughts. Give them a try and holler back if you are still having difficulty.

Cheers
Jeff

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HelicopterBeginners Corner › pitch and throttle curve set up
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