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HelicopterMain Discussion › Solving tail bounce 3gx/ Futaba 9256 *Yes I am​flying*!!!
10-26-2017 02:11 AM  23 days agoPost 1
InvertedDude

rrApprentice

USA

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Okay I finally dialed the 3gx

25% gain 3gx on Ele/Ali
Gear ATV 65% Gyro Gain
760 pulse for 9256 tail red light and green for DS

My problem is, I can't get rid of the tail bounce when the rudder returns to center after use. I tried to calm it down using Rudder Expo...works better but I want smoother performance!

Tail holds during power climbs and descents...just light bounce when I use it to turn the helicopter as the rudder stick returns to center.

Tried shorter throws for more torque....same problem.

I thought about delay....would that help?

JR 8311 on cyclic
Futaba 9256 on tail
CC 100Amp

Swash
Ele 50%
Ali 50%
Pit 50%

Cyclic expo 15%

Rudder Expo 35%

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10-26-2017 02:25 AM  23 days agoPost 2
utahbob

rrVeteran

St. George Utah

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"In the old days"..

Before I started flying V-bar..I used to shorten the servo horn on my rudder servo to make'em settledown..have you tried that?

I do a great decending funnel!

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10-26-2017 04:21 AM  23 days agoPost 3
dkshema

rrMaster

Cedar Rapids, IA

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Dwayne - are you using software V5.0? If not, install it. Then switch to gyro normal mode and hover. Adjust tail linkage so the nose doesn't yaw left or right.

Recheck/set the rudder endpoints to eliminate binding at the end of travel.

It has been a while since I set my 3GX stuff up, I'll go back and re-read the setup options and see what else I come up with.

V5.0 and adjusting the linkage in hover for normal mode is the first step.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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10-26-2017 04:34 AM  23 days agoPost 4
dkshema

rrMaster

Cedar Rapids, IA

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I'll have fire up my desktop tomorrow and see what settings you should tweak in V5.0. Seems that delay always defaulted to a large number like 30, and there was a trick to dialing it down to zero and having it stay there.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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10-26-2017 04:39 AM  23 days agoPost 5
InvertedDude

rrApprentice

USA

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Crashed!!!!

It was working well and flying around in my front yard. The helicopter was sitting around 15 feet hover and just decided to go hard left into the ground. If my electronics are good, I am looking at about $125 repair bill.

I was kinda stunned, oh well that is part of the hobby.

Will I try flybarless.....this just costed me under $125 for experimenting!

Pictures coming!

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10-26-2017 05:26 AM  23 days agoPost 6
InvertedDude

rrApprentice

USA

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photo of crashes

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10-26-2017 05:29 AM  23 days agoPost 7
dkshema

rrMaster

Cedar Rapids, IA

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Read this, including the Delay setting discussion:

https://rc.runryder.com/helicopter/p6407852/

You need a more capable regulator. That will solve the crash problem.

You need a regulator good for 6v out and at least a 6 amp continous rating. Which CC ESC are you using? If it has a built in regulator, it doesn't have enough juice to run your heli. I use the CC BEC Pro, it has two outputs and I use them both to power the system. Both are connected to the 3GX lower horizontal connectors.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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10-26-2017 05:37 AM  23 days agoPost 8
InvertedDude

rrApprentice

USA

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earlier flights

Watch at YouTube

Watch at YouTube

I was able to recover from my home security camera of the crash, heli goes out the picture before landing in tall grass.

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10-26-2017 05:43 AM  23 days agoPost 9
InvertedDude

rrApprentice

USA

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dkshema

I was using the BEC off Castle 100amps rated at 5 amps 6v. <---OOPS!

Guess I learned a $125 mistake!

oh well...

3x jr 8311
1x 9256
3gx
castle 100 5A BEC
spektrum AR610
glacier 5000mah 45c

Will be buying a separate fromeco/relion system to bypass CC BEC on ESC.

I have the 600esp electric helicopter flying, if this was a power fluctration on the R620. No desire to rebuild the R620.

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10-26-2017 06:57 AM  23 days agoPost 10
InvertedDude

rrApprentice

USA

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Align Trex 600esp Power Upgrade

I went ahead and disabled the BEC on ESC and use the castle 20A.

Rated at 13 amps continuous at 11.1 v.

Was running off the 10 amp castle bec from the 90a talon....been getting away with this for the last 40 flights on 600esp!!!!

I went ahead and installed the 20a castle separate bec with 2200mah 11.1v lipo.

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10-26-2017 12:57 PM  22 days agoPost 11
dkshema

rrMaster

Cedar Rapids, IA

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Confused. Which regulator were you using? The Talon 90 BEC is more than adequate, the only drawback is that it has a single output tap and servo connectors are rated at about 5 amps.

You should be running a minimum of 6v to the 3GX.

If you are now using the CC BEC Pro, give all wires a bit of slack so they are not pulled tight, then stick them to the frame using 3M gray double-sided tape. I run mine off the main battery pack and don't bother with a separate pack.

Wow..a 72 MHZ radio. Should be OK.

Maybe now I understand, you'really talking about two different helis.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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10-26-2017 03:10 PM  22 days agoPost 12
EEngineer

rrProfessor

TX

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servo connectors are rated at about 5 amps.
If gold plated.....tin plating is rated at about 4 amps.

From what I've seen from connector specs on this.

Logo 600SXs, 800XX, TDR IIs

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10-26-2017 03:49 PM  22 days agoPost 13
InvertedDude

rrApprentice

USA

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dkshema

What can I say Dave? I like old stuff. I do have a few modern DSMX transmitters. The older stuff feels better in my hands. Yeah 72mhz, I am risking to get shot down. The chances are small, are you implying me to switch to DSMX?

I just picked up the XP9303 new in box for $70!!!

My 10X needs repair for broken AUX2 switch.

The R620 (Raptor E550 converted to 620 size electric flybarless is the one that got smacked into the ground). The Align 600esp is the one I got ripped off by a local seller.

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10-31-2017 05:41 AM  18 days agoPost 14
dkshema

rrMaster

Cedar Rapids, IA

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I have no hidden agenda...you should know by now I work to the motto, "If it ain't broke, don't fix it."

A word of caution, however. Those 72 MHZ analog radios may have trouble when operated with the current crop of power hungry digital servos and FBL systems operating at higher than 60 Hz servo frame rates. There's a lot more noise on the power lines. The older analog systems might glitch at lower voltage levels, but usually will play through noise. Newer FBL systems and digital receivers reset and start over with momentary voltage dropouts. Your "rolled over and crashed" incident smells like an in-flight reset happened.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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10-31-2017 04:31 PM  17 days agoPost 15
InvertedDude

rrApprentice

USA

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dkshema

No worries Dave, Trust in you is not an issue.

I was using my DX6 and AR6600T RX running off Castle Phoenix 100A 5v bec at 5 amps.

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11-01-2017 12:14 AM  17 days agoPost 16
Doublah

rrVeteran

USA

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* Edit, never mind was already talked about earlier.

Be careful running the eternal 5 amp BEC on a 600 size helicopter. You need at least 10 amps and would even do the CC BEC Pro at 20 amps.

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11-01-2017 12:33 AM  17 days agoPost 17
EEngineer

rrProfessor

TX

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Only 5A now?

Feeling lucky, huh?

Logo 600SXs, 800XX, TDR IIs

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11-01-2017 12:42 AM  17 days agoPost 18
Doublah

rrVeteran

USA

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No, he was using a 5A and after the crash it was suggested to increase that big time. I could stall out a 5A BEC on a 450 size machine.

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11-01-2017 12:49 AM  17 days agoPost 19
EEngineer

rrProfessor

TX

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Good, I mistakenly thought he was switching to a 5A BEC.

Logo 600SXs, 800XX, TDR IIs

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11-02-2017 03:06 AM  16 days agoPost 20
InvertedDude

rrApprentice

USA

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I learned my $125 lesson

All my helicopter will have non-ESC dedicated power. I will use Regulators from Fromeco/Castle with separate power system.

Trust me, Not doing that again!

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HelicopterMain Discussion › Solving tail bounce 3gx/ Futaba 9256 *Yes I am​flying*!!!
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