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HelicopterMain Discussion › Goblin 630 drifts forward
04-01-2018 11:08 AM  18 days agoPost 1
Jamovich

rrVeteran

Bangalore, India

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Hi guys,

Am using a VBar neo with vcontrol on a goblin 630. I have a vexing issue in which the Heli always drifts forward in flight. Can’t hover in a single spot without correcting for forward drift actively. Has this something to do with the angled offset in the design of the goblin (the mast is not perpendicular to the ground)?

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04-01-2018 02:41 PM  18 days agoPost 2
Richardmid1

rrProfessor

Leeds, England

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Is the swash leveled with the main shaft?

60% of the time, it works every time!

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04-01-2018 02:47 PM  18 days agoPost 3
Pistol Pete

rrProfessor

Seffner, FL

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Jamovich
Has this something to do with the angled offset in the design of the goblin
No. It's a set up issue and a hammer wont cut it

Mast is perpendicular to frame. Tilt is relative to landing gear.

Set up as you would ANY other heli.

~~Enjoying the hobby one flight at a time~~

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04-01-2018 03:35 PM  18 days agoPost 4
Jamovich

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Bangalore, India

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you would be surprised on the range of issues a hammer can resolve...but sadly I agree it won't help much here

Yes the swash-late is leveled according to the mast but not the ground (I used a swash leveler to be sure). Yet the Heli has a pronounced forward drift that I must correct for in a hover.

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04-01-2018 04:02 PM  18 days agoPost 5
S.Favorite

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Brookville, OH

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Check for high vibration levels.

Citizen #27

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04-01-2018 04:06 PM  18 days agoPost 6
Jamovich

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Bangalore, India

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Vibration levels are within acceptable levels according to the vcontrol logs

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04-01-2018 04:25 PM  18 days agoPost 7
wjvail

rrKey Veteran

Meridian, Mississippi

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Sometimes when I have a problem that seems ill-defined, the solution is to "fix everything". By that I mean, go back and check your setup beginning with the transmitter trims and sub-trims and end with the FBL setup and whatever swash trimming tools your TX may offer.

You have a swash-plate leveling tool right? https://www.google.com/search?q=gob...kFzGRT-RAWZp7M:

Don't forget to check your helicopter's CG. Make certain the rotor disk is level when you pick the heli up by the head button.

In short, just make sure everything is "right".

I know this isn't very helpful and I know it isn't a quick fix. It just very difficult to trouble shoot such a nebulous problem and particularly difficult on a public forum.

"Well, Nothing bad can happen now."

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04-01-2018 05:33 PM  18 days agoPost 8
HeliOCD

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San Diego, CA

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Re-calibrate Tx.

Its all earth!

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04-01-2018 07:17 PM  18 days agoPost 9
dkshema

rrMaster

Cedar Rapids, IA

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Somewhat nose heavy?

-----
Dave

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

Team Heliproz

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04-02-2018 12:12 AM  18 days agoPost 10
mr dan

rrVeteran

Stockton Calif

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Optimize that Swash!

"R.I.P Roman" Citizen 0094 in the Nation

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04-02-2018 06:06 PM  17 days agoPost 11
ticedoff8

rrKey Veteran

Morgan Hill, CA. USA

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3 Things to check:
* Nose heavy (as stated by dkshema).
* Zero out the drift by adjusting the swash links (not the servos).
* Or both.

No matter how perfectly you level the swash, 99% of all helicopters will still need to have their swash links adjusted to zero out the drift at hover.

Assuming you set the servo arms perfectly at 90* and you perfectly leveled the swash using your favorite method, tool or technique, the heli will most likely and consistently drift in the same direction while in hover (inverted or upright).

While the direction and speed of the drift may be unique to your heli, the solution is universal and the same since the stone-age (AKA: "The time before Flybarless".)
My Goblin 650 Black Nitro drifted backwards and to the left (similar to your G630).

You can zero it out by following these steps:
Hover and observe the drift.
Land.
Adjust one (or two) swash links (not the electronic servo centers) in the direction that counters the drift.
Hover again.
Repeat until the drift is close to zero or you get bored.

It is not related to the gyros, the accelerometers or the gain.
It is not related to the stance on the ground while the gyro powers up. The nose being tilted up or down, left or right while it is resting on the skids does not affect flight.
It does not matter if it is MSH (iKON / Brain, VBar, Futaba - etc).
The designers / developers of the MSH gyros tell you this straight out.

Believe 1/2 of what you see and none of what you hear.
Fake News will be the downfall of our Republic!

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04-03-2018 02:36 AM  16 days agoPost 12
Jamovich

rrVeteran

Bangalore, India

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Thanks everyone for your tips

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HelicopterMain Discussion › Goblin 630 drifts forward
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