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HelicopterMain Discussion › here's a new one on me--radio problem--any ideas!
06-06-2012 01:11 AM  5 years agoPost 1
utahbob

rrVeteran

St. George Utah

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So I'm out for a flyin session with my trusty JR9303--converted from 72mhz to spectrum--about four yrs. old; I get two nice flights with my 450; then on the third flight I spool it up in normal mode--the head speed seems higher the previous two flights--I go into stunt mode and do the whole flight--seems ok; so then I get my 600n out and change models in the radio of course--take it out on the pad and take off--the model seems not too responsive on the collective--but I continue flying and then try to do an inverted climbout and the head bogs down and then the engine almost quits; so now I know somethings really wrong--I bring it in and check my curves on the bench and find that I have 8 deg. pos and 17 neg.--where i used to have 12 and 12; I turn off the system and try a couple of times but my centering seems to have shifted--I get out my 700 and check it out and the same thing! all my models don't have the proper curves--about 4-5 deg. off; I thought about re-binding but it seems like something in the radio is failing--so I'm sending it in but anybody else have this happen before?

I do a great decending funnel!

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06-06-2012 01:59 AM  5 years agoPost 2
dkshema

rrMaster

Cedar Rapids, IA

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Here's a thought. Have you disabled the rotary sliders on the sides of the transmitter?

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Dave

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

Team Heliproz

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06-06-2012 02:16 AM  5 years agoPost 3
HeliNerd

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Navarre, FL

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EXACTLY the same thing happened to me, and come to find out I had not disabled those sliders!!! Slide them up and down while you are checking pitch curves and you'll the the bias they create if not disabled.

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06-06-2012 04:26 AM  5 years agoPost 4
dkshema

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Cedar Rapids, IA

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Rebinding would NOT fix this, by the way. Binding sets the failsafe position and teaches the RX to look for the global unique identifier (GUID) from your transmitter so it knows only to look at signals encoded by your transmitter.

If you DO decide to bind again, make sure you have the throttle stick where you want throttle to go in the event the failsafe kicks in. For the most part, all other surfaces will hold the last known good position.

-----
Dave

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

Team Heliproz

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06-06-2012 04:54 AM  5 years agoPost 5
utahbob

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St. George Utah

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sliders
I had no idea that those sliders could affect pitch settings--I better get my manual out and read up on that--I do always keep them at the top position--thanks!

I do a great decending funnel!

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06-06-2012 05:24 AM  5 years agoPost 6
Cowjock

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Pa.

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This same thing just happened to me on my Futaba 10c except it was only getting about +9 degrees of pitch on my trex 700. It was driving me crazy because I knew it was setup right on the bench and it was only doing it in idle up 1 and 2, normal it was fine. Then it dawned on me that I had not disabled the high-low pitch adj sliders for idle up 1 and 2. Oh well, crap happens.

Damn that ground is hard! When's the right time to get out of this money sucking hobby?

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06-06-2012 01:19 PM  5 years agoPost 7
utahbob

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St. George Utah

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sliders
I checked my radio and the pitch slider was activated--you would think that would be inhibited as a default setting! anyway after I changed that I'm still showing 3-4 deg. drift off of my settings--the manual has nothing in it about those sliders at all; gonna send it in--upside--here comes the DX8! thanks for the info guys!

I do a great decending funnel!

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06-06-2012 01:36 PM  5 years agoPost 8
GetToDaChopper

rrElite Veteran

Las Vegas , NV

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if you had set everything up without the slides inhibited and at the top but now their inhibited it might be the defalt with them inhibited is mid slider so you might have to setup you curves once more if you get what i mean ?

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06-07-2012 12:02 AM  5 years agoPost 9
utahbob

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St. George Utah

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gimbal?
I have hundreds of flights--on several models with this radio--three to four hundred on my 600n alone without making any changes to my curves--maybe I just wore out the throttle-collective gimbal--could that cause centering drift?

I do a great decending funnel!

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06-07-2012 05:19 AM  5 years agoPost 10
dkshema

rrMaster

Cedar Rapids, IA

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Take a look at the monitor screen on your transmitter. See what positions the sliders associated with each channel are. I doubt that you "wore out" the pot in the sticks.

Watch the sliders as you move the sticks slowly, looking for erratic movement.

Also, if you have an unused model memory, reset it, then check the positions of the monitor sliders with everything centered.

-----
Dave

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

Team Heliproz

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