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HelicopterFlybarless Rotor Head SystemsBeastX › Help, my heli has the shakes..
01-03-2011 02:56 AM  6 years agoPost 1
crashagain

rrApprentice

Redding

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I have a Velocity 50 running BLS451's on the cyclic and I just installed the BeastX this weekend.
I was looking forward to having a great time flying, like everyone else I read about, but I am not so lucky.
As soon as I get the heli off the ground it shakes like I am doing a crack move with the aleron stick. Not the elevator, just aleron. It's shaking really bad. I tried knocking down the gain on Pot 1 but no help at all.
I am using the Align servo wheels, and did not change anything mechanical on the heli from my Skookum setup and it flew great before. I read about people using the inner hole on the wheels, but mine did not have them so I measured and drilled new holes 3mm in from the outer ones. I went to the field today expecting the heli to be better and it was not. It was a little better, but it's still shaking, again reducing gain on P1 did not help much. I'm at a loss here.... I had no problem getting a blue light setting up the 6deg. I have double checked my settings and can't find anything wrong.
Does anyone know anything that could help me. This is my favorite heli and I miss flying her..
..........................................................
Update!!!!

I am ready to chuck this thing into a wall....
I put on the star wheels, the balls are on the middle hole. I moved the balls on the blade grip arms to the outer hole. I went thru the setup again, no problem getting the blue lite with 6deg, setting up 13deg of pitch and no swash binding. As soon as the heli is off the ground it starts to shake side to side. No elevator wobble, and the tail is rock solid, not even the slightest drift.
So I landed, moved the balls to the inner most hole on the servos, and setup the head again. Still the same problem. I backed the gain adjustment on pot #1 all the way down and it still wobbles.
I am so @#$%%^#^#$ pissed I don't know what to do. I have spent 3 days working on it and have not been able to fly it yet. My Skookum 360 was great, no I am regreting spending the money on this..
HELP!!!! Is there something I am missing? I have no subtrims in the radio or on the trim tabs, everything is 100/100 on the end points, no P-Mixes. I am lost...

__________________

Velocity 50 FBL, Trex 600 FBL, Frenzy V2 FBL

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01-03-2011 03:26 AM  6 years agoPost 2
theriddick45

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United States

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Put the P1 back to the factory setting. Change the gyro pad to a hard pad I use Scott tape the one that comes cut already in 4. If you still have shakes well change your dampeners on the head a bid softer than the hard ones. If you don't have the unit strap well do it after you try the first fly at soon you change the pad.

Hope this help!!!

Suzi Janis 800e & 700e 3blade both w/Ikon

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01-03-2011 04:57 AM  6 years agoPost 3
crashagain

rrApprentice

Redding

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I used the hard pad that came with the unit, and it's really hard, it barely moves, very little..
I got a question about the dampeners. Why would using softer ones maybe help the wobble problem I am having? The blades are balanced and tracking perfectly.

Velocity 50 FBL, Trex 600 FBL, Frenzy V2 FBL

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01-03-2011 01:17 PM  6 years agoPost 4
theriddick45

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United States

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The unit is more sensitive to vibes I got the same problem when I install it I change the dampeners for hard ones and I got the shake later I discover that the ring that goes between the dampeners and the blade grips was to thick so I install the old ones with the new damperner and change the pad for the one I mention it Scott tape and strap the unit and it work.

Do this test strap the unit very hard without changing the pad see if you get an improvement.

The beast work I had tried it even on a gasser an it works awesome no shakes on the head. But do the test first strapping the unit then if there is no improvement change your dampeners.

Hope this help.

Suzi Janis 800e & 700e 3blade both w/Ikon

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01-03-2011 01:57 PM  6 years agoPost 5
Zman

rrKey Veteran

Florida

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One other option, that was my problem when first switching over to beast, Connectors!. FBL in general pull higher loads. I chased what you described for a whole day. tried different mounting tapes etc. Talked to Benny over phone for a while and decided to run second (redundant) lead to receiver. Bingo, smooth as silk. Your typical servo connector is only rated to about 1.5amps. As soon as I made this change, all was good. If going through a switch, possibly more problems. Its an easy try.

Mike

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01-03-2011 02:50 PM  6 years agoPost 6
theriddick45

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United States

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Zman...

Quote: Talked to Benny over phone for a while and decided to run second (redundant) lead to receiver.

Can you elaborate more on this please I'm a bit lost and wants to learn more tricks.

Thanks in advance buddy!!!

Suzi Janis 800e & 700e 3blade both w/Ikon

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01-03-2011 03:30 PM  6 years agoPost 7
Zman

rrKey Veteran

Florida

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Benny = red Z06 here on rr. He was/is testing several fbl units including the microbeast.

I was getting same behaviour as you described and tried different things such as mounting tape, mounting location. He suggested to run a second lead from battery to receiver. That was a couple months ago and the heli has been smooth ever since. FBL units pull more power than fb units and apparently between the amount of wiring and standard old servo connectors, it wasnt enough. Running the second lead did trick for me.

Even if it doesnt do trick, never hurts to have a redundant setup for battery.

Mind you. I didnt add another battery, just running two leads off current battery, both just plugged into the receiver.

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01-03-2011 03:39 PM  6 years agoPost 8
Zman

rrKey Veteran

Florida

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One other thing to check in the same thought process. What I noticed before adding the second lead was with engine running at idle, watch the swash closely and see if it doesnt have a very slight occassional "jitter". Or you can put your hand on blade grip and see if you feel a "twitch". Hard to see from any distance. got to watch closely.

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01-03-2011 03:40 PM  6 years agoPost 9
theriddick45

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United States

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Zman...

Awesome!!!! Thanks buddy!! that's nice.

Suzi Janis 800e & 700e 3blade both w/Ikon

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01-03-2011 04:20 PM  6 years agoPost 10
Zman

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Florida

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np. hope it does the trick.

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01-03-2011 10:50 PM  6 years agoPost 11
RACER7696

rrApprentice

Ma

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I read a post somewher and it might of been Benny's post and I belive he talked about useing a heavy gyro plate. Heavy meaning a steel one over an alu one. I am useing the stock Align tape then the metal plate not shure which one then I had a really thin tape laying around so I used that. I then straped it down somewhat tight and off the bench the only thing I have changed is the gain and the setting for the cyclic from sport to pro

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01-04-2011 03:06 AM  6 years agoPost 12
crashagain

rrApprentice

Redding

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Ok, Here's what I have done. I cleared the unit and made a new heli profile in my radio, setup everything from scratch. I redid the wiring and split it up. On one side I have the reciever leads and on the other I have the servo leads,and installed 2 holders to the frame to mount the wires to. Everything is nice and neat.
Tried a hover and same thing..... I installed a different unit to make sure it was the heli or the unit, I even added a strap to it.
Guess what?? it did the same thing, so now I know there is a problem with the heli, I just don't know what it could be. All bearings are smooth, it has a new swash, all the links and swash move like glass. Motor is running smooth. (YS56) I have tried loosinging up the blade grips a little, and nothing.
I started with the align wheels, then added a new hole 3mm in, now I have the star wheels on with the balls in the middle hole. At no time with any mechanical setting was I not able to get a blue light and hit the 6deg mark. I am running the Velocity FBL head, and was running a Skookum 360 for the last 6 month with no problems
...............................................................
Zman, I will see if I can add another power lead. I don't think I have another empty port on the RX it's an 8ch, and I will look for movements in the swash when the heli idles. I have not noticed anything strange, but I was not looking for them specifically.
One thing to note, that I noticed today. If the heli is on the ground at 0 pitch in idle up it will just sit there, the swash will not budge. As soon as the skids come off the ground the shaking starts, is I sit the heli down, even the front of one skid, the shaking stops.

Velocity 50 FBL, Trex 600 FBL, Frenzy V2 FBL

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01-04-2011 03:48 AM  6 years agoPost 13
Mojave

rrElite Veteran

Palos Verdes, Ca.​USA

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And the $56,000 dollar question is...have you tried the unit on another heli and have you swapped a different set of blades yet?

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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01-04-2011 05:31 AM  6 years agoPost 14
theriddick45

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United States

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Did you change the gyro pad?

Did you change the dampeners?

Suzi Janis 800e & 700e 3blade both w/Ikon

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01-04-2011 06:07 AM  6 years agoPost 15
crashagain

rrApprentice

Redding

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I greased the feather shaft and inspected the dampeners and they are good. I talked to Don at Amain today, and he is running the same dampeners in his Velocity 50 with a beast and no problems, so I decided to leave that alone.
I did change the tape since I changed the unit today. I even added a strap. Which I will test tomorrow.
Have not tried the unit on another heli, I only have one FBL heli.
The blades are cherry, 603mm FBL Edge's.
I took out the feather and main shaft and rolled them on glass and they are straight.

Velocity 50 FBL, Trex 600 FBL, Frenzy V2 FBL

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01-04-2011 09:37 AM  6 years agoPost 16
The Old Guy

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UK Surrey

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I had a similar problem on the tail of my Align 550. Chased my tail (so to speek) ended up grasping at straws and changed out the brand new servo for another one and all was well.

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01-04-2011 11:34 AM  6 years agoPost 17
Zman

rrKey Veteran

Florida

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hey crash,

Since it did it with another mb unit, it can point to heli or still power issue. If it has the same problem mine had, it would have kept doing it with different mb units so I think it is worth it to try if you can. Although not ideal, you can run a Y off your receiver for the second battery lead to plug into. I would run it out of ch 7 or 8. I hope I am not creating more work for nothing, it just sounds so close to what mine was doing and this second lead cured the problem hands down. Like I said, I spent a weekend trying to find a vib issue and the whole time, that wasnt problem.

Mike

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01-05-2011 02:20 AM  6 years agoPost 18
crashagain

rrApprentice

Redding

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I tried it again today with a strap, and it still shakes.
I ordered a set of 80deg dampeners to try as well, even though I think mine are OK.
I noticed something and have a question about it.
One of my aleron servos has some play in it. maybe 1/2mm or more, meaning I can wiggle the servo horn.
Can this be the cause? If the unit is so sensitive that it is always moving the servos and they are always looking for center maybe that's the cause.
Zman, I have not done the power thing, since I have to open up my regulator and solder another lead in it. makes me a little nervous.

Velocity 50 FBL, Trex 600 FBL, Frenzy V2 FBL

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01-05-2011 02:39 AM  6 years agoPost 19
AzHyper

rrKey Veteran

Peoria, Az.

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Here's a little trick I've been using to help debug FBL issues. Put your heli in a low steady hover and hit throttle hold. Watch what happens. If the shakes go away I always look at my motor, engine, or attached rotating components for a source of the vibration. In other words this may help isolate engine/motor vs airframe generated vibes. Your particular issues may not be vibration related but this little test won't cost anything to try.

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01-06-2011 04:52 AM  6 years agoPost 20
crashagain

rrApprentice

Redding

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Report..
Installed 3 new Savox servos and she hovers great. I had a small amount of wobble, but this time it was more overall not just aleron. I dialed down the gain about 3 marks and she is solid. I will take her out this weekend and finish the setup. Can't wait to really throw it around.
Thank you everyone for your input, I am glad I have got it figured out.

Velocity 50 FBL, Trex 600 FBL, Frenzy V2 FBL

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