Silly question perhaps??

[pug907]

Hi All,
Sorry if this appears to be a stupid question, but does the mounting position of the beastX (top, tail mounted) relative to the centre of the heli matter?? I know when I had the ZYX, it had to be near as damn it to the centre line of the heli? This one is against the left frame side, apparently where the 3gx was stuck?
The reason I ask, is that we set up the beastx on Tim's Rave ENV a few weeks ago, but had not tested it, until yesterday. When he spooled up, the heli would just pirouette, bloody fast too haha. We rechecked the setup and it was all as we expected?? Reset tail centre and endpoints anyway, but no change. He can hold it on the rudder, to start with, but as soon as he lets go, or makes a more defined rudder input, it spins wildy and tail slider is all the way to one side and stays there, even when stick is centred??. Tail comp. and servo are working the correct way, piro optimisation working correctly(we had that trouble once before ). I forgot to mention, it spins anti clockwise, so against inertia??

The heli was flying perfectly on a 3gx, don't laugh, it was!! so we can only imagine it's something to do with the beastx. I am pretty sure that the bx was brand new, so no chance of it being a dodgy crashed one!

Thanks in advance,

[milly0812]

Is it nitro or elec Andy ?

[pug907]

Is it nitro or elec Andy ?

Hi Don, electric.
Cheers,

[PorscheBoy]

Andy, possibly daft question, but it is aligned in the right direction, not 90deg wrong?

[milly0812]

The centerline is unimportant as long as it's parallel to the airframe. You can mount the bx vertically too. Could there be a bad vibe ?

[tomatwalden]

Sounds to me like you've got the tail setup wrong! In particular, step F (tail sensor direction).

I had the same effect with my Goblin a few weeks back after I'd fiddled with the tail. In my case, I'd managed to put the belt back wrong so that the tail rotors were spinning the wrong way! :-O

[pug907]

Hi Paul, nope, it's mounted wires facing tail box and led set to blue solid.

@ Don, I'll ask Tim to check it's not touching the side frame, causing it to "bounce", but heli is supper smooth on spool up. Swash plate stays dead still, as you would expect nay hope hahaha. It's also mounted on a piece of 3M tape, not the mattress they supply!

[tomatwalden]

Hi Paul, nope, it's mounted wires facing tail box and led set to blue solid.

The LED in step F should be red if you've got the wires facing out the back ....

[pug907]

Sounds to me like you've got the tail setup wrong! In particular, step F (tail sensor direction).

I had the same effect with my Goblin a few weeks back after I'd fiddled with the tail. In my case, I'd managed to put the belt back wrong so that the tail rotors were spinning the wrong way! :-O

Cheers Tom.
It's TT and blades are also facing the right way( been there before hahaha). My way of checking the tail sensor direction, is to put my finger between slider and tail box, move the tail to the right, and it should squash my finger?? First thing I checked TBH.

What is slightly puzzling, is that the tail slider moves to an end and won't return unless you move rudder stick?? I know they never centre themselves fully whilst on the bench/ground, but usually move to centre a little?

[tomatwalden]

Cheers Tom.
It's TT and blades are also facing the right way( been there before hahaha). My way of checking the tail sensor direction, is to put my finger between slider and tail box, move the tail to the right, and it should squash my finger?? First thing I checked TBH.

Have you perhaps clipped the slider onto the tail pitch levers wrong so that you've got trailing edge rather than leading edge on the tail blades ?

[pug907]

The LED in step F should be red if you've got the wires facing out the back ....

I meant blue for mounting orientation.

[waveydavey]

Cheers Tom.
It's TT and blades are also facing the right way( been there before hahaha). My way of checking the tail sensor direction, is to put my finger between slider and tail box, move the tail to the right, and it should squash my finger?? First thing I checked TBH.

What is slightly puzzling, is that the tail slider moves to an end and won't return unless you move rudder stick?? I know they never centre themselves fully whilst on the bench/ground, but usually move to centre a little?

It all depends on the tail geometry, the best way is to turn the tail blades vertical and bend the bottom one out at 90 degrees as in the rudder of a boat, cup the blade in your hand and move the heli one way the tail blade should go the same way, ie if you move to the left the tail blade will move to the left and vice versa

[pug907]

Have you perhaps clipped the slider onto the tail pitch levers wrong so that you've got trailing edge rather than leading edge on the tail blades ?

I wish I could type quicker hahaha. Nope checked that too. Trailing edge nose direction, leading edge tail direction. The heli hasn't been dismantled since it was flown on 3gx, maybe he should refit it lol!!

[tomatwalden]

Cheers Tom.
It's TT and blades are also facing the right way( been there before hahaha). My way of checking the tail sensor direction, is to put my finger between slider and tail box, move the tail to the right, and it should squash my finger?? First thing I checked TBH.

As waveydavey hints, that holds true if that's how the tail is designed. For most I think it's correct, but if you've got the pitch links wrong, you'll find the slider moving left actually gives the wrong pitch on the blades.

[pug907]

It all depends on the tail geometry, the best way is to turn the tail blades vertical and bend the bottom one out at 90 degrees as in the rudder of a boat, cup the blade in your hand and move the heli one way the tail blade should go the same way, ie if you move to the left the tail blade will move to the left and vice versa

Thanks Dave,
Same sort of thing really, if the blade moves right, slider moves left & will pinch my finger, left it won't. The tail pitch levers are leaders, as opposed to followers.

Cheers