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T-REX 450 › Interesting tail / gyro problem...
08-12-2007 10:33 AM  10 years agoPost 1
helibatics

rrNovice

Cheshire, UK

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Hi all..

I have a tail/gyro problem I haven't found any remedies for by doing a search.

When I stop turning the model using the tail, the tail returns about 5 - 10 degrees towards the direction it came from. (happens in both left and right directions)

I've increased gain, decreased gain, used the ds setting, not used the ds setting, increased / decreased head speed, tightened / loosened belt, Problem persists.

I'm running a V2 SE with
GY 401 / 9650, small round servo wheel.

Tail holds well in fast backwards flight etc, just doesn't stay where I put it!

My Rappy 50 with 401 has never had this symptom.

Anyone else had this happen?
What else can I try?

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08-12-2007 10:42 AM  10 years agoPost 2
menace

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Sydney, Australia

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what have u got the Delay, Limit, and is DS mode 'ON'?

!boo!

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08-12-2007 10:46 AM  10 years agoPost 3
helibatics

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Cheshire, UK

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Delay is at 0
Limit is at about 85 to stop binding
ds mode is on.

any alarm bells with this setup?

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08-12-2007 10:57 AM  10 years agoPost 4
menace

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Sydney, Australia

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my delay is set to 0 and my limit is at 100

i read somewhere to set the limit to 100 so it can work with the servo better

!boo!

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08-12-2007 10:58 AM  10 years agoPost 5
menace

rrKey Veteran

Sydney, Australia

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It was Jason Krause that said "put the limit to 100, and it will bind when the rotors are spinning but it doesn't seem to while flying"

!boo!

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08-12-2007 10:59 AM  10 years agoPost 6
helibatics

rrNovice

Cheshire, UK

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Do you not get a binding issue at full travel?

I'm using the small (wheel) servo arm that came with the servo. If I set the limit to 100 it binds something chronic!

I'll see if I can change the setup to achieve 100 and give it a go...

Thanks

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08-12-2007 11:02 AM  10 years agoPost 7
helibatics

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Cheshire, UK

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Thanks!

Our messages must have crossed...

Will give it a try!

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08-12-2007 11:10 AM  10 years agoPost 8
menace

rrKey Veteran

Sydney, Australia

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is this your disc size on the 9650?

!boo!

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08-12-2007 11:26 AM  10 years agoPost 9
helibatics

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Cheshire, UK

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Yes, that looks about right.

Here's mine

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08-12-2007 11:33 AM  10 years agoPost 10
menace

rrKey Veteran

Sydney, Australia

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Exactly the same,

...i assume u made sure u got a stable hover in Rate mode without using ANY trim at all, then turn off heli, put Tx in HH mode and check in HH mode?

since its the same put the limit to 100

also i have my gain at 40% on a 14MZ (not sure what Tx u have)

!boo!

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08-12-2007 11:38 AM  10 years agoPost 11
helibatics

rrNovice

Cheshire, UK

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Yip. In normal mode the tail is centered with no trim.

Just been outside to test it with 100% limit. No change.

My gain is 55% with futaba 7cp. I've tried changing it but it doesn't help.

Perhaps I'll change the gyro out with the one in my raptor and see if it's the same...

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08-12-2007 11:50 AM  10 years agoPost 12
menace

rrKey Veteran

Sydney, Australia

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i meant the limit pot ON the gyro itself...not in the radio

!boo!

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08-12-2007 11:56 AM  10 years agoPost 13
helibatics

rrNovice

Cheshire, UK

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I Know.

That's the one I put to 100. It didn't make a difference.

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08-12-2007 12:13 PM  10 years agoPost 14
menace

rrKey Veteran

Sydney, Australia

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try a swap-out and keep us up to date

also try another servo

!boo!

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T-REX 450 › Interesting tail / gyro problem...
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