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ProModeler Scorpion Power
HelicopterMain Discussion › tail drifting, not a trim issue too
06-06-2010 12:14 AM  7 years agoPost 1
bhoff

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houston texas

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okay the tail has still been drifting..only thing i just realized is i have the 450 pro set on my dx6i and i have the gain at 66, but its still in rate mode...so i lower the gain to under 50 (under 50 is rate mode, above 50 is HH mode) and its still the same, i never fly in rate mode but im guessing rate mode is when i move the rudder it will automatically go back to the center, is that rate mode?..this has to be part or the cause of my tail drifting btw its not trimming either...idk..bad gyro?

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06-06-2010 12:57 AM  7 years agoPost 2
cudaboy_71

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sacramento, ca, u.s.

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which gyro?

if it ain't broke, break it.

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06-06-2010 12:59 AM  7 years agoPost 3
bhoff

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houston texas

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gp750

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06-06-2010 01:05 AM  7 years agoPost 4
holzback

Key Veteran

noblesville IN United States

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rate mode= gyro stops drift and you put the heli back to center

hh= gyro stops drift and puts heli back to center

try to turn the gain up and see what happens. undo your rudder linkages and see how smooth they are.

you aint crashin you aint learnin

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06-06-2010 01:12 AM  7 years agoPost 5
cudaboy_71

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sacramento, ca, u.s.

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gain values vary by radio and helicopter.

if the tail does not return to center when you release the rudder stick, then you are certainly in HH mode.

just keep raising the gain value 5 points at a time until the heli wags in a hover...then begin lowering 1-2 points at a time until it stops wagging. that should get you very close. you can tweak the values in flight to get rid of wagging in FBF, etc.

now, if you're not seeing any changes with the value changes perhaps something's hooked up wrong. wouldnt be the first time i'd seen the gain wire plugged in the wrong hole of the RX; or depending on radio--gyro "listening" to the wrong channel.

if it ain't broke, break it.

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06-06-2010 10:55 AM  7 years agoPost 6
Jeff polisena

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westpalmbeachflorida usa

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I cant remember exactly but it is in tx you need to turn off a channel or mix . I had one or two channels were conflicting . I use atvs to adjust gains and gyro sense was causing problems . Its been a while so sounds weird but take a look at it.

I stole it ,flew it and gave it back ;)

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06-07-2010 01:17 AM  7 years agoPost 7
koppter

Senior Heliman

Virginia

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i had this problem too, turns out the culprit was that the trim between normal and idle up was different, so once switched into idle up, the rudder trim changed and caused it to drift. not sure about the dx 6, but on the dx 7 there is a menu that allows you to see servo placement, and using that screen it was easy to match the trims to zero. otherwise could switch between the two modes and ensure that the servo doesn't move.

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06-07-2010 12:31 PM  7 years agoPost 8
Hamo

Veteran

Ireland

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Please give more detail of the drift. Are you talking about a very slow rotation of the heli while hovering ? If so, how many seconds for 90 degree rotation ?
Hamo

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06-07-2010 01:16 PM  7 years agoPost 9
TachyonDriver

Key Veteran

Chipping, Lancs, UK

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Jeff - you're possibly referring to REVO mixing I think. And you're correct - HH gyros don't like it.

Tach.

Little Spinning Bundle of Joy® DON'T DISS THE DINO!!

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06-07-2010 01:23 PM  7 years agoPost 10
Jeff polisena

Elite Veteran

westpalmbeachflorida usa

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Yes but on DX6 also there is another problem I found I will get dx6 and try to get correct terms

I stole it ,flew it and gave it back ;)

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06-07-2010 10:30 PM  7 years agoPost 11
bhoff

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houston texas

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okay i put the gain under 50% which usually is rate mode for the dx6i but my gyro was reversed and so when i go under 50% its HH mode...idk if thats cuz the gyro is reversed or not but thats my guess...so i put the gain at 25 and i had no drift at all, then i went to idle up (gain also at 25) and the tail was doing crazy wag, i lowered all the way to 8% and it still was wagging...im gonna take it to my LHS tomorrow and see whats up. but the drift was gone, so i guess when the gyro is reversed then above 50 and under 50 switches too with rate mode and HH mode..cuz im in HH mode at 25% but with my sport the gyro is normal and im in HH mode at 68%...the drift is a very slow drift tail to the right nose to the left, probably takes 5 seconds to get to 180 degrees but like i said when i moved my gain down under 50 which is in HH mode, cuz i have to correct it to center, i have no drift...

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HelicopterMain Discussion › tail drifting, not a trim issue too
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