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Blade 300 › Wobbles when piroetting left.
01-04-2013 11:55 AM  5 years agoPost 1
Richardmid1

rrProfessor

Leeds, England

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Anyone elses 300 disk wobble when piroing to the left? Piro comp is correct. Funning thing is it piro's totally flat and still when piroing to the right!

Swash is level, no vibrations, C of G is bang on, heli has had no crashes, Lynx frame stiffener installed, Align 425M cyclic servos (bought these as I thought it was the stock servos causing the wobble!), swash phasing/timing now correct (see my other topic), stock wood blades, MH carbon and Gaui X2 carbon blades and no difference, stiffened the damping up with extra shims and the BeastX seems to be sat perfectly level, im still getting this disk wobble when piroing to the left!

Its flyable sure and will even piro flip nicely but if you want to do a simple piro hover its hard work as are piro hurricanes!

60% of the time, it works every time!

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01-04-2013 03:53 PM  5 years agoPost 2
Richardmid1

rrProfessor

Leeds, England

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Just tried it with the BeastX on top at the back with some red backed 3M tape and no difference.

Heli also wobbles on hard stops, cyclic gain doesn't change it.

60% of the time, it works every time!

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01-04-2013 09:11 PM  5 years agoPost 3
TomC

rrKey Veteran

Gold Coast, Queensland, Australia

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Mine piros flat-as both directions (stock servos btw). Really makes me look good, lol!

Only thing I can think of is to check that your tail blades are spinning perfectly vertical. Sometimes the rear tailcase (esp metal one and/or boom frame mount gets a bit sloppy and you can end up with it tilted a bit.

Maybe also check that your swashdriver arms move nice and loose (but without side-slop).

Cheers,
TomC

Nqx,Mcpx-BL,300x,450x,500x,550x
Ion-x, 10s ,SS
TT X50E 10s, HC3-Sx

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01-04-2013 09:34 PM  5 years agoPost 4
Richardmid1

rrProfessor

Leeds, England

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Funny you should mention tail position as I found a tail heavy 300 makes it Piro flatter! So I deliberately twisted the tail boom clockwise to see if it improved and it did slightly!

60% of the time, it works every time!

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01-05-2013 02:46 PM  5 years agoPost 5
69maverick

rrApprentice

thomaston,ct

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Its Vibs
Everything happening is vibration related. Most guys are changing the motor to a Scorpion and replacing the tail grip set to an Align V2 or sport grip set that fits like it was make for it. Just use the stock ball ends. Then reset the beastx up and your good. I run mine at 100% an 13 + & - with a 10 tooth pinion and it screams.

Jim B.

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01-05-2013 04:44 PM  5 years agoPost 6
Richardmid1

rrProfessor

Leeds, England

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There are no vibes. There is no drifting or any other strange behaviour just a wobbly disk when pirouetting to the left like the c of g is way off or the swash isn't level but both are spot on!

60% of the time, it works every time!

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01-06-2013 01:45 AM  5 years agoPost 7
69maverick

rrApprentice

thomaston,ct

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Did you go through the BX setup and make sure the servos are centered at 90 at half stick? Did you put a swash leveler on it at the same time? I know this sounds dumb but is your battery velcroed down and strapped? Are your main blades to tight? Are you using the stock blades? They need to be FBL blades.Is this in idle up or Normal mode?

Jim B.

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01-06-2013 08:18 AM  5 years agoPost 8
Richardmid1

rrProfessor

Leeds, England

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Swash is level, no vibrations, C of G is bang on, heli has had no crashes, Lynx frame stiffener installed, Align 425M cyclic servos (bought these as I thought it was the stock servos causing the wobble!), swash phasing/timing now correct (see my other topic), stock wood blades, MH carbon and Gaui X2 carbon blades and no difference, stiffened the damping up with extra shims and the BeastX seems to be sat perfectly level, im still getting this disk wobble when piroing to the left!

I'll add blades aren't too tight, servos are at 90 mid stick, battery is strapped down and it does this in normal iu1 and iu2.

I had a beastx on 5 other helis without this problem.

60% of the time, it works every time!

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01-06-2013 09:48 AM  5 years agoPost 9
TomC

rrKey Veteran

Gold Coast, Queensland, Australia

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Last try, lol!

Maybe the problem is your Tx? Some Tx pots do not center as well as others. Maybe try increasing the parameter deadband to 3-4 and see if this helps.

Cheers,
TomC

Nqx,Mcpx-BL,300x,450x,500x,550x
Ion-x, 10s ,SS
TT X50E 10s, HC3-Sx

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01-06-2013 10:52 AM  5 years agoPost 10
Richardmid1

rrProfessor

Leeds, England

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No it's not the tx pots. I put it down to the airframe itself not being rigid enough for fbl and hard 3d.

60% of the time, it works every time!

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01-06-2013 12:40 PM  5 years agoPost 11
TomC

rrKey Veteran

Gold Coast, Queensland, Australia

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Very last things you might want to try;

Replace the ar7200bx mounting tape with Align gel tape, strapped down firmly in the stock position. This gel tape really kills most vib-related problems and may help you in your case. Works great for me.

Only other thing I can think of is a dodgey cyclic servo that is not re-centering properly and/or a servo arm that is a bit loose/sloppy.

Cheers,
TomC

Nqx,Mcpx-BL,300x,450x,500x,550x
Ion-x, 10s ,SS
TT X50E 10s, HC3-Sx

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01-06-2013 03:18 PM  5 years agoPost 12
69maverick

rrApprentice

thomaston,ct

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I hate to say this but the Align servos are not the greatest servos. I personally use HS5065s But I am not saying that this is the issue yet. In the beastx setup the last item is the one part that controls the compensation in a piro. Is it right? Did you check? HH recommends in these type of situations that you do a total system reset and start over. Did you try that? Also put all of the pots at 50% to start. I have yet to see the need for any of them to be higher. beastX says that this is the starting place for a 450 so a 300 should be there or less. I have worked on and corrected over 30 of these heli's and none of them needed to be over 50% except a few on the tail pot.No sub trims right? You can also set the trims so even if you hit them they can not be trimmed. The last thing and I know this will sound crazy but one of my customers bought a used DX8 it worked perfect with all of his plains and his 500 pro with a beastX but for some reason on his 450X it did all kinds of crazy things. he did a test on the gimbels and it showed that there was an inconsistency in them. They didn't always zero out. He sent it back to HH they fixed it and when it came back all was good and has not had any problems in months. But it only did it on this one model? So who knows why but it can happen. I agree that the frame is an issue but I have one setup like yours and it rips. So they can work. BTW I did put a support in the frame under the motor. I used a frame cross member from a 500 and cut it down drilled holes in the frame and screwed it in. So it ties the frame halves together.

Jim B.

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01-06-2013 09:23 PM  5 years agoPost 13
Richardmid1

rrProfessor

Leeds, England

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Thanks for the ideas guys. I actually got to fly a totally stock one today belonging to another club member and his did pretty much the same thing only his seemed to wobble more when piroetting to the right but also wobbled when piroetting left. When I say wobble, you can't see the heli wobbling but the disk, it wobbles in time with the speed of the piroette exactly as it would if the C of G was way off.

If piro comp was reversed it would be almost unflyable which it isn't, its just a tad annoying.

60% of the time, it works every time!

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01-06-2013 11:57 PM  5 years agoPost 14
69maverick

rrApprentice

thomaston,ct

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???
When you do a punch out does it go to the right or left or go forward or back? if so you need to adjust the A setting in the parameters setup.

Jim B.

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01-07-2013 10:34 AM  5 years agoPost 15
Richardmid1

rrProfessor

Leeds, England

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Hmm. Yes it did kind of dip to the right briefly on fast punch outs but that was with the Eflight servos, on the bench the swash would start level then as you moved the collective up it would tilt right towards mid stick then back to level at full collective, this is the reason I bought the Align servos which now all move equally as they should but the piro wobble is still there albeit slightly less.

Ive never touched parameter A on any of my helis, I don't understand how it is different to adjusting the swashplate servo centering (G)?

It actually says "for instance your helicopter is wobbling during piroettes or when it doesn't climb out straight on quick pitch inputs." This is exactly the parameter I need to adjust it seems but surely if all the servos are at 90 and the swash is level and the C of G is correct you shouldn't need to touch this parameter right?

60% of the time, it works every time!

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01-07-2013 10:44 AM  5 years agoPost 16
Richardmid1

rrProfessor

Leeds, England

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Ok just did some googling and it seems this parameter only needs adjusting if you have drift in a hover which I don't. It doesn't mention drifting in a hover in the manual which would be the most obvious sign that your swash wasn't level or your C of G was off!

60% of the time, it works every time!

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01-15-2013 07:37 PM  5 years agoPost 17
JLV84

rrNovice

Savannah, Georgia

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I flew a friends bone stock 300 this past weekend and he told me it did the same thing. Sure enough wobbles on left piro but not right. I am a right piro guy so its wasn't a big deal but for someone that piros left like my buddy it can get pretty annoying and make some moves difficult. It drift pretty badly upon left piro as well. No dirty radio pots it was a almost brand new dx18. I tried beating it around as hard as possible and it took it all other then left piros.

James VanHook iKON Flybarless Factory Pilot SAB Heli Devision Rep Goblin 700

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