GY-401 problem (the gyro in not mine)
06-01-2008, 05:49 AM
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GY-401 problem (the gyro in not mine)
Hey guys. I just saw that video: http://www.youtube.com/watch?v=2cXDm...eature=related
One guy (see comments) said something about "rate" and "head hold" with a percentage. What exactly did he said? What's the difference between the "head hold" and the "rate". Isn't the "head hold" the AVCS?
One guy (see comments) said something about "rate" and "head hold" with a percentage. What exactly did he said? What's the difference between the "head hold" and the "rate". Isn't the "head hold" the AVCS?
06-01-2008, 06:44 AM
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RE: GY-401 problem (the gyro in not mine)
No man, sorry for that. I know that i'm a pain for you but please, try to answer that because i'm confused. You told me what the i want the "head hold" but didn't tell me what it is. If there is a chance of answer that in the past, please forgive me, because my memory is a bit low lately, and i can't hold recent events [&:] I was searching the answers you gave me and didn't find that. I search on google and i can't understand. I am really pissed off, when that thing with my memory is being happening [:@] I think that when i get old, i will suffer from altzhaimer (something like that), so i wanna fly helis before i forgot what RC is 
06-01-2008, 07:00 AM
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RE: GY-401 problem (the gyro in not mine)
I just find that image, pretending a ryroscope. I think that kinda help
Can i figure what is the "rate" and the "head hold" on that image?
Can i figure what is the "rate" and the "head hold" on that image?
06-01-2008, 07:05 AM
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RE: GY-401 problem (the gyro in not mine)
A rate gyro, or a gyro in rate or what is also called normal mode, will control unwanted tail movements by applying a correction to stop the movement. That is, they control the rate of the unwanted movement and make it manageable.
A helicopter hovering in a sideways wind will eventually weathervane into the wind. The wind will push the tail the gyro will correct to stop the motion, the helicopter will stop, the breeze will push the tail, the gyro will correct and so on till its in to the wind and nothing is pushing the tail.
In heading hold (avcs, tail lock, heading lock; they all mean the same thing) the wind will blow the tail and the gyro will apply AND KEEP APPLYING a correction so the tail stays put. If the wind blows harder the gyro will apply more correction, if the wind slacks off the gyro will take some correction away. It will fight unwanted movement up to the mechanical limit of the tail rotor system at which time the tail will blow out or whip around (sometimes alarmingly)
The better the gyro, and more importantly, the better its set up by the user, will determine at what point a blow out occurs. Things like bogging the head with too much main blade pitch will slow down the tail, reduce its efficency, and make the tail blow out. So will crappy setup like not enough gain, slop in the linkage, too much gain, a servo arm thats flexable vice a nice stiff wheel etc.
A helicopter hovering in a sideways wind will eventually weathervane into the wind. The wind will push the tail the gyro will correct to stop the motion, the helicopter will stop, the breeze will push the tail, the gyro will correct and so on till its in to the wind and nothing is pushing the tail.
In heading hold (avcs, tail lock, heading lock; they all mean the same thing) the wind will blow the tail and the gyro will apply AND KEEP APPLYING a correction so the tail stays put. If the wind blows harder the gyro will apply more correction, if the wind slacks off the gyro will take some correction away. It will fight unwanted movement up to the mechanical limit of the tail rotor system at which time the tail will blow out or whip around (sometimes alarmingly)
The better the gyro, and more importantly, the better its set up by the user, will determine at what point a blow out occurs. Things like bogging the head with too much main blade pitch will slow down the tail, reduce its efficency, and make the tail blow out. So will crappy setup like not enough gain, slop in the linkage, too much gain, a servo arm thats flexable vice a nice stiff wheel etc.
06-01-2008, 08:02 AM
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RE: GY-401 problem (the gyro in not mine)
Ok. And that percentage what is it? The rate is 50-100% and the heading lock 0.1-50%. What are the best settings for a raptor 50?
06-01-2008, 10:55 PM
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RE: GY-401 problem (the gyro in not mine)
ORIGINAL: BarracudaHockey
Thats impossible to answer without knowing what radio and how you're setting the gain. The percentage that works on the raptor is the percentage that holds w/o running too much gain. It varies.
Thats impossible to answer without knowing what radio and how you're setting the gain. The percentage that works on the raptor is the percentage that holds w/o running too much gain. It varies.
.Anyway, thanks for the help buddy and sorry if i was a apin. Now i know more than enough to start entering helis. My future radio would be a futaba 7C 2.4 Ghz, if you have some settings, bring them on
