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HomeRC & Power✈️Aircraft🚁HelicopterRadio - Servo - Gyro - Gov - Batt › Woofing with new RX battery?
05-24-2007 04:59 PM  13 years ago
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R/C Speed Nut

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Galesburg, Michigan USA

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Woofing with new RX battery?
I have an Evo 50 that when it was new (three years ago) with a new RX battery, was woofing. I never found the cause, but the woofing went away after several flights and has been woof free since.
Now I have put in a new RX battery and am having the same woofing again.
Is it the batteries causing this?
I had put one conditioning cycle through the pack, and am now cycling it two more times.
Any ideas or advice?
Thanks!

Mike

Funky Chicken?!!..........I thought this was how you do a piro flip!!
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05-25-2007 04:02 AM  13 years ago
Chief_USN

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Chesapeake, VA

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Don't take me wrong as I'm not trying to be mean. What are you considering woofing? Woofing as we know it, is the blades start out tracking fine and then all of a sudden, they go out of track and make a woofing sound. Normally woofing is caused by play or slop in the collective system. If your RX pack is causing it, are you sure it is mounted nice and tight where any vibration from it that could transfer into the frame of the helicopter is isolated and removed? Wrapped in foam, etc? I just find it wierd how a battery would cause woofing. Do you have it mounted on top of the radio tray or in the battery tub?

Chad
Team HeliProz 12-14
US Navy Chiefs...Unity, Service, & Navigation to the Fleet since 1893
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05-25-2007 03:59 PM  13 years ago
R/C Speed Nut

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Galesburg, Michigan USA

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blades start out tracking fine and then all of a sudden, they go out of track and make a woofing sound.
That's the same woofing I am talking about.
Normally woofing is caused by play or slop in the collective system.
I can't find any slop in the linkages, but there is just a little play in the swash bearing.
I just find it weird how a battery would cause woofing.
My thinking is that maybe a new battery that isn't fully conditioned yet can't deliver the amps to the servos to keep them centered.
How else can this heli fly perfect for three years and as soon as I change the battery, Woof?!
Do you have it mounted on top of the radio tray or in the battery tub?
The first battery was in foam in the tub (4.8v "sub-c" 1800 ni-cd), The new battery (4.8v "A" 2700 ni-mh) is mounted under the radio tray in foam and strapped tight with a Velcro strap.

Servos are 9252's on collective and cyclic.

Mike

Funky Chicken?!!..........I thought this was how you do a piro flip!!
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05-27-2007 07:31 PM  13 years ago
R/C Speed Nut

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Galesburg, Michigan USA

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I think I have confirmed my suspicions. After two cycles with 1 amp load, the woofing is gone.
Will test further, but I think the case is closed.

Mike

Funky Chicken?!!..........I thought this was how you do a piro flip!!
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05-28-2007 02:42 AM  13 years ago
RCMed-x

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westpalmbeachflorida usa

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If this helps sometimes if there is slop in links or servo battery voltage can give more or less power to servo and servo cant hold under load I noticed this in servoes with plastic gears that have some good time on
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