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HelicopterRadio - Servo - Gyro - Gov - Batt › csm 420 gyro help
07-13-2008 05:17 PM  9 years agoPost 21
AltecLansing

rrElite Veteran

North Carolina

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Read pages 8 and 9 dealing with quick trim. From what I see, is that if the trim on the tail is too far off in rate mode, then you won't get quick trim to get a good lock. If its close, then you can use quick trim to get a good lock. Mine is close, but not 100 percent perfect. It doesn't matter to me now. I'm done with this gyro. I will be removing it and installing a 401 or 770. They left one important instruction out of the manual. The part that says it takes a month to set up this gyro.

Man, I miss the eighties.

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07-13-2008 05:32 PM  9 years agoPost 22
nivlek

rrProfessor

Norfolk England

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From what I see, is that if the trim on the tail is too far off in rate mode, then you won't get quick trim to get a good lock.
If your set up is that far out mechanically , no gyro will work at its best . The way that I set up my CSM gyros is to first hover in HH and trim the tail out . Then flip into rate mode and note if the tail wants to turn . Then land and adjust the linkage length until the tail stays pretty much put in rate mode (this will not effect HH). Only then do I use the quick trim if needed .

At the end of the day , it gets dark .

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07-13-2008 05:40 PM  9 years agoPost 23
AltecLansing

rrElite Veteran

North Carolina

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I hovered mine in rate mode first. I got it very close in set up with that. The drift it has in rate mode is very slight. When I had it in heading hold mode back when I first started with this gyro, it had a small drift. I could fly it like that with little issue. Back then, it was the severe bounce back. This is what happened. I would give it input to turn the nose to the left perhaps a quarter turn or a little less. Than I put the stick back to center. You can watch the tail. It would let me turn, then when I centered the rudder, the tail bounced back to where it was as if I never turned the heli. This is an intermittant problem. It doesn't matter which way I turn the heli. It can and will happen both ways. I turn down the gain, and it lessens, but then the tail is too loose to feel comfortable flying.

In rate mode, mechanically, I would say its 98 percent on. I don't consider that to be way out. I think any gyro should be able to handle rate mode being 98 percent on and then lock in on heading hold. Even my evo 50 isn't as locked in rate mode as this mini titan. Yet, it stays locked in in heading hold mode. I am sure the csm gyro is nice. I did like the csm 360 even though it took me a month to get it locked in. I just don't want to spend another month setting up this gyro. I'm done with it. I want simplicity. I would prefer to fly than to spend day after day and flight after flight trying to lock in this gyro. I am sure that someone with experience with these gyros could get me set up much quicker, but there is no one locally that can help me with that. After I fly my evo this afternoon, I will remove the csm gyro and install the 401 and put the csm up for sale. It has 6 flights with me and only a couple of flights with the previous owner. I have the box and two of the pads along with the directions.

Man, I miss the eighties.

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07-13-2008 09:55 PM  9 years agoPost 24
nivlek

rrProfessor

Norfolk England

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I know where you are comming from , you just want to fly ! However , if you don't get CSM gyro's trimed out in HH before you adjust it for rate mode , you are just pissing in the wind .

At the end of the day , it gets dark .

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07-13-2008 10:10 PM  9 years agoPost 25
AltecLansing

rrElite Veteran

North Carolina

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I really don't see how trimming it in heading hold first and then fix the rate mode will cause it to work. Especially, if the rate mode is way out and not allow the heading hold to lock in.

Man, I miss the eighties.

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07-13-2008 10:29 PM  9 years agoPost 26
steve 01

rrProfessor

Grand Rapids MI

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Enjoy the 401

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07-14-2008 01:01 AM  9 years agoPost 27
cometman

rrNovice

Anderson, California

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I found that the csm 420e would not act right unless it had a pretty long servo horn on. It acts as manual gain. Or like turning down the delay on your 401.

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07-14-2008 07:34 AM  9 years agoPost 28
nivlek

rrProfessor

Norfolk England

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I really don't see how trimming it in heading hold first and then fix the rate mode will cause it to work. Especially, if the rate mode is way out and not allow the heading hold to lock in.
Wether you can understand it or not isn't the issue , you are the one who can't get the gyro working ! Like the saying goes ,if all else fails read the manual .

From the manual : First select Flight mode 1 (Smart Lock mode) and hover the helicopter.

In HH the gyro sees the pulse width of the signal from the receiver as a demand for a given rate of rotation . You have to adjust the trim for zero rotation in HH . Simple as that . Then worry about rate mode .

At the end of the day , it gets dark .

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07-16-2008 01:49 AM  9 years agoPost 29
AltecLansing

rrElite Veteran

North Carolina

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Problem solved! I have good solid lock on the tail. No bounce back! Insane piros!

Man, I miss the eighties.

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07-16-2008 02:33 AM  9 years agoPost 30
steve 01

rrProfessor

Grand Rapids MI

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Congrats hope your happy with it now

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07-16-2008 02:37 AM  9 years agoPost 31
AltecLansing

rrElite Veteran

North Carolina

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LOL! yes, I am happy with the 401 I put in place of the 420 e. I may revisit the 420e gyro at a later date, if I don't sell it first. I like the options it has. It was just being difficult for me to set up. And since I just built this heli, I wanted to spend more time flying it than setting up the tail.

Man, I miss the eighties.

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HelicopterRadio - Servo - Gyro - Gov - Batt › csm 420 gyro help
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