Lumenier RB2205C-12 2400KV SKITZO Ceramic Bearing Motor
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Old Sep 29, 2012, 06:38 AM
nascar1929 is offline
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Anyone know where I can get a main gear case and one-way bearing spacer for my Tarot 450 Pro V2? I can't find them anywhere.
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Old Sep 29, 2012, 07:01 AM
KTMDirtFace is offline
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Does it have to be tarot brand?

Amain hobbies has them for the Align which should work I would think.
Old Sep 29, 2012, 08:06 AM
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Yes, they are compatible with each others.
Old Sep 29, 2012, 08:12 AM
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One-way Bearing Shaft Collar (Ring)


Quote:
Originally Posted by nascar1929 View Post
Anyone know where I can get a main gear case and one-way bearing spacer for my Tarot 450 Pro V2? I can't find them anywhere.
It's available at Infinity Hobby, link here.

EDIT: Missed the main gear case.
Last edited by Arey; Sep 29, 2012 at 04:32 PM.
Old Sep 29, 2012, 02:19 PM
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Thanks for the help. I had a tough time searching those 2 parts for some reason. Sure would be nice if the one way bearing collar would come with the main gear case as a set.
Old Sep 29, 2012, 02:49 PM
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The one way bearing cover is one of the pieces I always swap out for an Align part in my clones. I seem to get a better fit onto the (Align) mainshaft that way, and in governor mode, the clone mainshaft covers wear out pretty quickly too.
Old Sep 30, 2012, 01:57 AM
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I was looking for these as backups and found the entire assembly with gears on ebay... I never ordered one ( china ) They were align brand when I looked
Old Sep 30, 2012, 07:06 AM
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Quote:
Originally Posted by sgbfly View Post
A quick update on the FFF nose-up problem

I've not had much chance to fly due to bad weather but today it relented.

I'm trying high cyclic gains. 70 overall and 80-100-30 PID. I completed a backflip, roll and some simple circuits with no issues. Onto FFF into the wind and this was interesting. At the point where the helicopter may well have previously done it's magic abrupt nose-up trick a mild shake set in. This was not the wet dog shakes across the aileron axis but very similar across the elevator axis. It was not hard to control and the heli was returned safely to ground.

I'm going to try lowering the overall gain to 60 and see what happens. If that is a bust then I'll raise the gains and experiment with reducing the D-gain.




Simon

Edit: Scratch all that - it's a bust. The shakes and pitch-up can occur one without the other or both at the same time in vFFF into the wind. Video later
In respect to the nose pitch up in FFF, I have just read on another forum a similar problem, where the ZYX equipped heli would become very pitch sensitive in FFF, however in a different situation, the two could be very well associated but may be a route to an answer.
His problem only occured in FFF but he did not report that the heli did the command itself. He reported that condition made the heli super sensitive to a pitch input i.e a small input made a large change of movement to the heli, So my question is are you by any chance putting small pressure on the elevator stick without realising it? Or have you got a dicky pot on the TX that puts in a slight elevator response around the centre. These are just suggestions by the way as I can tell you are pretty meticulous in your build and test procedures and would not want to upset you in any way.
Old Sep 30, 2012, 07:27 AM
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Quote:
Originally Posted by Busher View Post
In respect to the nose pitch up in FFF, I have just read on another forum a similar problem, where the ZYX equipped heli would become very pitch sensitive in FFF, however in a different situation, the two could be very well associated but may be a route to an answer.
His problem only occured in FFF but he did not report that the heli did the command itself. He reported that condition made the heli super sensitive to a pitch input i.e a small input made a large change of movement to the heli, So my question is are you by any chance putting small pressure on the elevator stick without realising it? Or have you got a dicky pot on the TX that puts in a slight elevator response around the centre. These are just suggestions by the way as I can tell you are pretty meticulous in your build and test procedures and would not want to upset you in any way.
Given the same heli with previous firmware does not have the issue I can't see how any of your suggestions might apply in this case.

I have 2 tarot 450 pro v2's with zyx and same cyclic servos... one with 3.5 and one with the previous version. 3.5 heli has the problem the other one does not, flying them back to back with the same settings.

Jonesy
Old Sep 30, 2012, 09:44 AM
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Mechanical?


My HK450 Pro was flying great, with no pitch up in FFF. (with a CX3x1000, original firmware) After a crash and rebuild, however, it started to pitch up. That really spoiled the feel of the heli, making stall turns with hard pull-outs much trickier. After the next crash, I installed new servos (Align DS410's) and the pitch up was gone.

So I believe there are also mechanical factors involved.
Old Sep 30, 2012, 10:00 AM
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Quote:
Originally Posted by ahamay View Post
Given the same heli with previous firmware does not have the issue I can't see how any of your suggestions might apply in this case.

I have 2 tarot 450 pro v2's with zyx and same cyclic servos... one with 3.5 and one with the previous version. 3.5 heli has the problem the other one does not, flying them back to back with the same settings.

Jonesy
Just a suggestion, I am pretty pleased with mine it flies ok and doesn't pitch up, so it may be worth looking for other paths but anyway hope you get yours sorted either by changing the firmware or by other means.
Old Sep 30, 2012, 04:07 PM
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What's the rule of thumb regarding cyclic gains? Are these normally set lower for bigger birds compared to smaller ones; or, is it the opposite? Just wondering if there is any difference.

I have one setup in my 450-size and doing well. Now, I am setting up one for my 640-size.

Any input will be appreciated.
Old Sep 30, 2012, 04:25 PM
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Originally Posted by ricoalonso View Post
What's the rule of thumb regarding cyclic gains? Are these normally set lower for bigger birds compared to smaller ones; or, is it the opposite? Just wondering if there is any difference.

I have one setup in my 450-size and doing well. Now, I am setting up one for my 640-size.

Any input will be appreciated.
There's definitely a little bit more to it as bigger birds also involve much higher torque which generally require a higher mechanical gain actually, but with headspeeds that are generally much lower on the bigger birds, you should get away with somewhat higher gyro gains. Ideally the gyro values really should still be in the same ballpark though.

And regardless, all this still doesn't mean you should dial in something high straight away. :-)

As a true rule of thumb, always start low and increase the gains from there. The bigger the bird, the less you should want to risk any kind of too high gain related issues. A lot also depends on what type or brand of gyro we're talking about.
Old Sep 30, 2012, 05:18 PM
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I am refering to the ZYX-S gyro. My tail is good except for the swash which seems to be a little slippery feel than it is in my 450.

Thanks for the input. I'll try so increase the PID settings little at time. Yes I would imagine that a gyro gain related shake will be riskier in bigger birds.
Old Sep 30, 2012, 06:08 PM
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My value hobby B grade Tarot is finished. Unfortunately, I could not get the Futaba S-Bus working, so I am using a HK Frsky non S-Bus FASST compatible receiver. It would have been a sweet setup with only the S-Bus cable between the receiver and fbl unit instead of the mass of wires going everywhere .

The ZYX-S is set up with the beginner defaults. I only hovered to see how it did. It did not crash so I think the beginning of this journey is off to a good start. Now I need to tidy up the wiring and I guess I need to read up on PIDs...


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