Blade 130x "A gear" manufacturing fault ?

[tomatwalden]

I received my 130x this morning and straight away hit the horrible vibration issue on spool up. On closer inspection, I think I have two things wrong with my heli. One, the tail spindle doesn't look straight - though I admit, I'm just looking at it as I turn the main gear. More worrying though was that I noticed a "sticky" effect when I turned the blades by rotating the main gear.

There was an obvious moment during each revolution where I could feel pressure against the rotation. Looking *really* closely, I could see the "A" gear move up very slightly on the "B" gear when at the pressure point. Looking closely at the "A" gear, the reason is obvious, it's been manufactured really badly. Now, this is a new heli arrived today - 5 flights, no crashes. The photo shows the problem pretty clearly I think. Look at the tooth in the centre of the image. There's about 3 or 4 teeth around the circumference of my A gear that are the same.

Has anyone else noticed this !? Haven't seen anything in the usual sticky posts ...

[SmileyMan]

Common issue. The TT/Boom is installed badly in the factory, In fact sometimes the wrong way round!!!!

The sticking you are getting is the B gear being pushed out from the bearing towards the A gear due to the Boom set-up.

This is damaging the edge of the A gear. The mesh is to tight.

How I have learnt to install this so I get no wear on the A Gear until I crash lol

Recommend this for ALL 130x even from new!

1. Strip down the Head and Tail (Vids on Youtube for this)
2. Remove all gears and the TT.
3. Insert the C gear (Big white one) onto the small flat of the TT (Some dental floss gives a better fit just remember to trim flush with a sharp knife so it does not get into the bearing)
4. Make sure the tail case is "Fully" inserted onto the boom (Hot glue if it's not tight)
5. Insert the TT into the Boom and fit the B gear (Small metal one).
6. Loosen the 2 screws in the frame holding the boom in.
7. Push the boom all the way in and you will get some movement on the TT back and forth.
8. Slowly pull the boom out bit by bit Until the back and forth slop just disappears (I find levering with a screwdriver between the frame and tail servo mount helps here).
9. Tighten the frame screws. Replace Boom mount and rebuild Head and Tail.
10. Sorted!!!

As for the tail spindle some have been made out of shape. And the vibrations come from the slop in the bearings / slider and unbalanced tail blades / grips.

Regardless what HH say this is not OK or NORMAL. I solved by fitting better tail bearings / Silicone O-Rings to tighten up slider and KBDD tail blades. Guess what no vibration and much much reduced chance of losing a eye due to Tail Blade Ejection.

Hope this helps.

[tomatwalden]

Hi SmileyMan,

I've actually since sent this heli back since it had problems with the AS3X system too. My replacement is much better :-) The problem with my A gear however wasn't the common meshing issue - it was that the teeth hadn't been manufactured properly. Some teeth simply weren't cut "deep" enough causing the A gear to be pushed up whenever one of those teeth came though.

I'm betting the 130x-v2 is probably already in development!

T

[diggerbarnes]

I have the same problem but also found the cog is stripping away at the circuit board!

bring on v2

[nobbycopter]

I'm betting the 130x-v2 is probably already in development!

T

That's what I'm waiting for

[sparts]

The metal upgrade A gear is much better and it doesn't wear out

[Idle Jack]

it can be caused by the c gear being on to tight,

i don't think there will be a version 2 as its design isn't really at fault (other than the clearance to the fet from the B gear, and perhaps the tail slider) i see it mostly as production and build faults that i imagine will be quietly fixed without the fan fare of a version 2, i'm already reading the new bearings have zero slop so im waiting on the new tail shaft production as that's the main culprit.

just a thought i could be wrong

[n00by]

i think they'll sort the issues out on the quiet kind of thing, there are 2 versions of the mainboard already too.