450 wobbling Dominator

[trainrider06]

hey ya all, I had posted an earlier thread about my 450 Dominator having a bit of wobble in idol 1 I lowered the cyclic gains on the AR7200BX but get no results. I really don't know what would be going on here with this thing!
I'll try and get a video of it this evening. She's smooth as silk in Idol 0, but when I go to idol 1 it gets this little shake in it. I know the higher head speed is bringing it about. may have to go all through it and see if I can see something amiss I suppose.

 

[Tony]

Just FYI (and you should know this Texas boy!!!), it's "Ya'll" lmao. Had to do it.

How much did you lower it? I just flew my 450 Pro V2 with AR7200BX (didn't end well unfortunately) and the stock cyclic gains are perfect!!! I tried IU2 (100% throttle) and the tail gave out on me causing it to go down to the ground in a rather quick fashion....

So your IU1, what % is it and how much did you lower your cyclic gain?

 

[trainrider06]

Yeah I saw your video, and poor bent up heli.
I adjusted the cyclic swash adjustment down or to the left about a 1/4 turn in all on the AR7200's dial.
The tail is great, dialed in locked and loaded, you can see the skids wobbling around. I was gonna see about shooting a video of it to better explain it. Need to look at blade tracking also, because I haven't really paid attention to it, my focus being on the skids as they shake very subtly back and forth. I'm beginning to wonder if it's either a blade or head issue thinking about it some.

 

[Tony]

Yup, check the balance of the blades and make sure your blades are not too tight. Also, might be a good idea to check your main and feathering shafts and make sure they are straight as well.

 

[Tony]

So why did you put this in the 500 section? (400-500mm blades). 450's have 325mm blades, and 500's have 425mm blades.

 

[trainrider06]

Haha, didn't pay attention is why! It's hot out in the garage dang it! So my thunkin ain't thinkin right....
Well I just checked balance on blades, had a heavy one, also I think I'd mentioned this back when I built this thing, but one of the blades has a little thicker root. I took some 0000 steel wool and got that to fit a little better to where it's not as tight.
Charging a pack now, will get it on film to see if it's still doing it, after it charges...

 

[Tony]

right on, I will be waiting for it as long as it's not too late.

 

[trainrider06]

Packs about charged and ready to go with camera....gotta hurry damn storm is coming!

 

[D.O.G.]

Yeah I saw your video, and poor bent up heli.
I adjusted the cyclic swash adjustment down or to the left about a 1/4 turn in all on the AR7200's dial.
The tail is great, dialed in locked and loaded, you can see the skids wobbling around. I was gonna see about shooting a video of it to better explain it. Need to look at blade tracking also, because I haven't really paid attention to it, my focus being on the skids as they shake very subtly back and forth. I'm beginning to wonder if it's either a blade or head issue thinking about it some.

I thought when adjusting the dial on the AR7200, you'll only turn the dial like 1/16 @ a time. The AR is touchy when turning dial. 1/4 turn is much. Just my opinion.

 

[Tony]

I usually turn it about an hour at a time (1/12th of a turn). But if you are wanting to see a drastic difference, a 1/4 turn will show you if that is the issue.

Just an FYI, all of my pots on my 7200BX are at 12 O'Clock.

 

[trainrider06]

yeuup they were all at high noon, and had adjusted it about a 1/4 turn without improvement, then found the weightie blade, leveled that, got pack charged and put her in the air.....then two things went wrong LOL
the storm I mentioned was very near but it was calm, I flicked to idol 1 and all the sudden this loud noise started, sounded like monster pitch was taking place, popped it off of idol 1 and then about that time the wind blew.....I mean BLEW!!!!!
the heli was tail in at the time and when the wind hit at about 40-50mph the heli went from level to tail down, and it was getting out of control, I got it level, but the wind was trying to take it away, so I dropped the stick and she came down hard!
Stripped one of my DS430's but that was all, oh put a slight ding in one blade. My video entailed a lot of cussing, and I had set the focus up way too close so it didn't capture much but the dang grass.....
Wish I had that on video. that was a wild ride! oh the noise, that was the crappy old tape I used and it was flapping in the breeze.....unbelievable the sound it made! Sounded like monster pitch being applied.....
Luckily I have a couple spare 430's in stock so won't be any expense just the pain in the ass off getting the servo off and resetting it up.....

 

[Tony]

Sounded like your flight went better than either one of mine lol. But sucks about the servo. I know that pain as well. Hope you get it together and in the air soon.

question is, did it wobble in IU1? lol

 

[trainrider06]

didn't even have time to get a look see at it, that noise started, then as soon as the wind hit as I dropped off idol 1 to 0 i had my hands full of stick and butt suckin oh hells LOL

 

[trainrider06]

There must be a heli Demon floating out today with our luck huh?

 

[murankar]

Dfc has issues at lower head speeds. You could be in a head speed range that does not suit for dfc. Try bumping the head speed up a little and see of that improves.

 

[trainrider06]

i have the head speed in range on the Dominator, i am wondering if these blades are the culprit, because one of them had a screwed up root size, and was fairly heavier than they other....

 

[trainrider06]

I thought when adjusting the dial on the AR7200, you'll only turn the dial like 1/16 @ a time. The AR is touchy when turning dial. 1/4 turn is much. Just my opinion.

Hi Ivan, yeah I had adjusted it 3 or 4 different times just moving it a little, once I got to a 1/4 I figured since it was still doing it that was not the issue anyway.....

 

[Tony]

There is something floating around in the air today. It has been a very long time since I had this many things go wrong at once with helicopters. Time to put them up for another week...

 

[trainrider06]

Man what a pain! Found stripped drive gear too! That tail section is a pain to remove also! Had to remove the rear frame to head assembly to get it out!
Thank goodness I am a hoarder though! Lol

 

[Tony]

Damn dude, hook a broke brotha up! I need one of those electronics trays, a battery tray, tail servo tray and a pair of canopy mounts!!! Help a broke brotha out!