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HomeAircraftHelicopterHIROBOHirobo Turbulence › Elevator arm gets severe binding
01-29-2012 12:48 AM  6 years agoPost 1
rudyy

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E. Amherst, NY

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I have successfully set the FBL to optimal using BeastX by using the servo horn radii at 9mm. However, I get the severe binding when the swash is just at 8 degree and the elevator is deflected. The upper push-pull arm of the elevator is hitting the canopy standoff.

Now, I am stuck. Should I custom drill a hole to mount the standoff such that it is aligned with the servo horn screw.

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01-29-2012 03:35 AM  6 years agoPost 2
rudyy

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I customer drill a hole about 3mm below the stock hole for the canopy standoff and have it aligned with the servo horn screw and now everything is ok.

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01-29-2012 03:41 PM  6 years agoPost 3
synodontis

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United Kingdom

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why do you need the servo horn radii at 9mm? It would just make matters worse for you wouldn't it? what was the reason for doing this?

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01-29-2012 04:28 PM  6 years agoPost 4
rudyy

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why do you need the servo horn radii at 9mm? It would just make matters worse for you wouldn't it? what was the reason for doing this?
I am not able to achieve the optimal FBL geometry even at 10mm.

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01-29-2012 05:05 PM  6 years agoPost 5
synodontis

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then I would change to the Futaba GY750 and be done with it.

it's kind of stupid what this BeastX is making you do, but I haven't looked into it properly and hence can't really comment since I haven't even gone FBL yet.

what was the reason anyway for moving over to the smaller radii? Was it to have a smaller cyclic range?

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01-29-2012 05:40 PM  6 years agoPost 6
rudyy

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.. cannot use GY750... My radio is JR.

.. and what is the problem with using 9mm radii?

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01-29-2012 05:45 PM  6 years agoPost 7
synodontis

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.. cannot use GY750... My radio is JR
then get an 8FG and be done with it. And I'm not even a rep for Futaba.
.. and what is the problem with using 9mm radii?
wasn't your push pull suppose to be in perfect parallel arrangement? but anyway, you were the one complaining that it was hitting the canopy support.

why is the BeastX imposing this condition? What is it trying to achieve?

there's no point in looking for answers if you don't quite know what the problem means.

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01-29-2012 07:59 PM  6 years agoPost 8
rudyy

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I check with Ben Minor that the push pull rods do not need to be in parallel as they are long enough not to impose any negative impact. So I do not see a problem here.

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01-29-2012 08:12 PM  6 years agoPost 9
synodontis

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the original Turbulence setup uses bigger servo horn radii so that it's the same size as the CCPM cranks they go to, so why have you've gone against design and moved the radii in?

I never said it would impose any negative impact, I just want to know why you're doing it.

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01-29-2012 08:17 PM  6 years agoPost 10
rudyy

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E. Amherst, NY

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I am not using the stock SSZ-IV head but the SSL FBL head.

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01-30-2012 12:31 AM  6 years agoPost 11
Dr.Ben

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Richmond, VA, USA

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He has to move in on the servo wheels to get the proper throws to satisfy the Beast's control algorithm. Those using the 750 have had to go in the servo arms as well, though not as much as the Beast is apparently asking Rudy to do. If you use the servo arm radii that keep the pushrods parallel was is the case with the FB model, then you end up with far too much collective and cyclic throw.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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01-30-2012 01:29 AM  6 years agoPost 12
synodontis

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United Kingdom

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yes, by going to a lower radii you decrease the range, but I always though you could control the throws on each swash servo on the CGY750 to get the range you want. (but after thinking about it that can't be possible because it would affect collective linearity, so all 3 will have to follow in line.)

I thought the BeastX did it as well, looks like I was mistaken.

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01-30-2012 04:15 AM  6 years agoPost 13
Dr.Ben

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You can set the throw percentages to anything you want, but if they aren't within a designated range for a given amount of cyclic pitch, the relationship between mechanical and electronic gain and overall travel gets skewed to the point where the system won't fly well at all. In the case of the CGY750, you need to keep the swash AFR's in the 50-60% range for correct operation. Stock servo arm radii on a Hirobo model with FBL head force those AFR's into the low 40's or even upper 30's. By virtue of the blue light for BeastX or the slider range for a specific cyclic pitch angle for VBar, the exact same functional goal is being met.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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01-30-2012 12:41 PM  6 years agoPost 14
synodontis

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United Kingdom

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this is just an offhand guess, but I would think having a mixing arm at the end of the blade grip would sort of fix the problem, but haven't really looked into it yet.

it would be a mechanical way of ratio up or down whatever cyclics throws you have at present to accommodate for the range you want?

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01-30-2012 01:17 PM  6 years agoPost 15
Dr.Ben

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Yes it does, and that is why I have used it in the past on the Freya and still do on the SDX. The SSL head doesn't have that option, so you have to get the travel reduction via the servo wheels.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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01-30-2012 02:20 PM  6 years agoPost 16
synodontis

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United Kingdom

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another option I see would be to make a metal adapter on the pitch arm, so it uses the two holes for support, and goes further out than the furthest hole seen here, just a piece of metal with 3 holes would do it. not as nice as the previous option and you might end up with something that sticks out too much to get the ratio down.

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01-30-2012 06:46 PM  6 years agoPost 17
Dr.Ben

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Richmond, VA, USA

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That's the problem. You can't stand off the pitch arm but so much or the angle to the swash gets funky. If you go to a larger inner swash ring to compensate, then you put back the added travel you were trying to remove with the larger pitch arm standoff.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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01-31-2012 02:47 AM  6 years agoPost 18
Bugcatcher

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Perth, Australia

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You could possibly rig up something using the original D3 bladegrip and mixing arm. May be able to run a longer bolt from the radius block. Trick is to get a ball link to attach to it.

A mikado radius block may be an option as I think it may use 3mm bolts for the arms so you can then attach a ball on there. Then its a matter of finding the right length rod to match.

The Eagle also uses a slightly different bracket for the canopy that could be modified to work on the D3 which could help with the servo rod hitting the canopy mount. Not sure if the servo brackets on the Eagle are different to match.

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02-02-2012 10:58 AM  6 years agoPost 19
Brendan78

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NSW Australia

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The eagle bracket could be a good option, does anyone have a pic of it up close?

Raptor 90 G4 / YS120SRX / VBar Silverline / Futaba / Rotor Rage / Edge

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02-02-2012 12:07 PM  6 years agoPost 20
synodontis

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United Kingdom

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I do, but it won't work because of how it is fixed.

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HomeAircraftHelicopterHIROBOHirobo Turbulence › Elevator arm gets severe binding
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