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Pitch problems

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Old 03-17-2003 | 01:01 AM
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Default Pitch problems

Okay here is my problem. Been trying for two days to figure this out. Since buying my Venture I had not even checked the pitch curves. Decided to buy a pitch gauge and check them out. They were terrible. At low stick I was at +2, at medium it was around +10, and off the chart at high stick. Decided that I would have no shot at a proper auto with these settings.

I set them like the book says low stick -2, half stick +5, and high stick +10. Recentered the servos, adjusted the linkages, and put it all back in place. Rechecked them and everything was cool. Keep in mind that I had to go into the CCPM and adjust the pitch from +65 to +81 to get enough for the -2 at low stick.

I left my throttle curve the same 0%, 50%, 100% as that is what the book says to do. Now it seems like my engine is over reving and won't get off the ground. I don't really understand this because the heli should take off real good and the engine should have an easier time with the proper pitch settings.

Please help me if you can. I have a JR X378 radio. I would be interested if somebody could give me their numbers for pitch, throttle, and CCPM and let me compare them to mine. Maybe I could figure out what my problem is. Thanks in advance.
Old 03-17-2003 | 04:52 AM
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Default Pitch problems

Are you positve you have +5 deg at half stick? If you have aleast +5 it should not be over speeding.
Old 03-19-2003 | 04:33 PM
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Default Pitch problems

I had the same problem with my Venture. With the radio set at default settings I had +4, +15 and off the scale at high stick. With the stick at half and the servo arms level I adjusted the swash to head linkages so that I had 0 at mid stick. That gave me -12, 0, and +15. Then adjusted the radio to get -2, +5, and +10. It worked perfectly. I checked my head speed at hover and found 1600 which is just right. I'm using a RD6000 so I don't know if my radio settings will help you. They are pitch low=40, mid= 65 and high= 88.
Old 03-19-2003 | 04:38 PM
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From: Friday Harbor, Wa
Default Pitch problems

Forgot to mention my throttle is at 0, 50, and 100. I never had to change it. The Venture flies beautifully.
Old 03-20-2003 | 12:54 AM
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Default Pitch problems

Out of curiosity, is there any way to find out what the pitch of a helli blade is while it's in motion? Considering I'm sure the pitch while the blades aren't moving can't possibly be the same as they are in motion.

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