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danb1974 · 01-16-2015, 03:35 AM

Hi,

Got my hands on a beaten up 5#10 clone (century spirit v3) without battery

Wired like three smaller lipos in parralel, just to test it. When I start the motors, without touching other controls, both swash servos move (left on goes up, right one goes down). Almost like they are wired to throttle stick

Without motors they stay in place

Swash respons correctly to aileron and elevator sticks with motors off

Radio is also a walkera clone, seems only to have rev and trim, no mixes or anything advanced.

Not sure what am I dealing with, interference from motors, some weird electronic board issue... I'll try to look inside the electronics for anything funny

Any ideas what can cause this?

Thanks

danb1974 · 01-25-2015, 07:48 AM

Got it sorted out. So I learned that

- unlike other manufacturers, heli electronics has no cutoff, walkera micro heli batteries have a small electronic board inside that protects them

- this heli needs good batteries, power consumption is around 10Amps (not kidding). Took 4 paralleled mcxp-like batteries to hover for 5 minutes. Original battery is around 1000mAh, so it adds up. But no pitch pumps, it's a flying brick.

- electronics is powered at 3.3V via a series regulator. Even LDO (low drop) regulators do need a bit more input voltage as the output, so when batteries got under say 3.6V, electronics voltage also sagged and servos started to act up. A tiny dc-dc converter would help here. Or a 2S mod...

- electronics is c..p, gyro and controls drift like crazy with battery voltage, you start with perfect hover, one minute later you're compensating on all sticks. Not sure why. Had gyro drift on other coax helis, but not that bad.

- remote is all-show (backlight lcd) no-features (can't set anything but rev) but looks good to a noob. Dual-rate is changed by a small potentiometer on the electronics board. Gyro sensitivity the same.

And, of course, a 300-gram metal coaxial is a no-no. Outside even the slightest breeze and it's gone. Inside, it's a less common way to get hurt or to shred the flowers. Unless you live in a palace with a ball room.

But hey it was free and fun to make it fly again.

01-16-2015, 03:35 AM	#1 (permalink)
danb1974 Registered Users Join Date: Jan 2012	Walkera 5#10 clone swash acting funny Hi, Got my hands on a beaten up 5#10 clone (century spirit v3) without battery Wired like three smaller lipos in parralel, just to test it. When I start the motors, without touching other controls, both swash servos move (left on goes up, right one goes down). Almost like they are wired to throttle stick Without motors they stay in place Swash respons correctly to aileron and elevator sticks with motors off Radio is also a walkera clone, seems only to have rev and trim, no mixes or anything advanced. Not sure what am I dealing with, interference from motors, some weird electronic board issue... I'll try to look inside the electronics for anything funny Any ideas what can cause this? Thanks

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01-25-2015, 07:48 AM	#2 (permalink)
danb1974 Registered Users Thread Starter Join Date: Jan 2012	Got it sorted out. So I learned that - unlike other manufacturers, heli electronics has no cutoff, walkera micro heli batteries have a small electronic board inside that protects them - this heli needs good batteries, power consumption is around 10Amps (not kidding). Took 4 paralleled mcxp-like batteries to hover for 5 minutes. Original battery is around 1000mAh, so it adds up. But no pitch pumps, it's a flying brick. - electronics is powered at 3.3V via a series regulator. Even LDO (low drop) regulators do need a bit more input voltage as the output, so when batteries got under say 3.6V, electronics voltage also sagged and servos started to act up. A tiny dc-dc converter would help here. Or a 2S mod... - electronics is c..p, gyro and controls drift like crazy with battery voltage, you start with perfect hover, one minute later you're compensating on all sticks. Not sure why. Had gyro drift on other coax helis, but not that bad. - remote is all-show (backlight lcd) no-features (can't set anything but rev) but looks good to a noob. Dual-rate is changed by a small potentiometer on the electronics board. Gyro sensitivity the same. And, of course, a 300-gram metal coaxial is a no-no. Outside even the slightest breeze and it's gone. Inside, it's a less common way to get hurt or to shred the flowers. Unless you live in a palace with a ball room. But hey it was free and fun to make it fly again.

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