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12-19-2003 06:46 PM  13 years agoPost 1
wigsf-15

rrNovice

Klamath Falls, Oregon

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I recently purchased Century Hummingbird from HeliHobby. Purchased the Lithium Kit, and picked up a spare Lithium batt. The problem I have is this...on a full charge, I will get around one or two attempts at getting airborne...then I will try two or three more times, but with not quite enough power to get off the ground, plus servos begin to do their own thing. I will hold the skids, and throttle up...motor seems to pull hard initially, but at full throttle the red light comes on on the Hummingboard, and the motor procedes to wind down as if it's running out of battery. I only get around 4-5 minutes, regardless of which battery I'm using. What am I missing/doing wrong? This is getting very frustrating as I'm wanting to get the thing in the air. Thanks for any help anyone can provide. Cheers and Happy Holidays to all.

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12-21-2003 09:13 AM  13 years agoPost 2
rp56

rrApprentice

Woodland, WA

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a little more info,

what motor and what mods are you running?

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12-21-2003 02:50 PM  13 years agoPost 3
blueeyedpop

rrApprentice

westlake village, CA

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Are you running outdoors, or in the cold?

My HB won't fly unles the packs are warmed up.

Grrrrrr

See my post about power sagmy previous post

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12-21-2003 03:45 PM  13 years agoPost 4
wigsf-15

rrNovice

Klamath Falls, Oregon

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Right now, I'm running the 370 motor, and at the time I was running the 3 cell LiIon battery pack that Century sells as an upgrade. I also have the shaft collar on it, but that's pretty much it. As far as whether I'm flying out or in, it doesn't matter. I found some postings elsewhere regarding the battery I was using, and they said to stay away from it. Now I'm back to the 2c Etech, but it's much lighter and now I'm fighting with the CG. Is it possible that by using that 3 cell battery, I could have dorked my motor up? Thanks a lot for the help everyone, and Merry Christmas!

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12-21-2003 03:49 PM  13 years agoPost 5
wigsf-15

rrNovice

Klamath Falls, Oregon

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Just read the link on the batteries, sounds like that's my problem. Will now look at new motor, 'cause I think my original 370 is shot.

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12-21-2003 06:17 PM  13 years agoPost 6
blueeyedpop

rrApprentice

westlake village, CA

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I was able to differentiate between motor and battery issues by looking at the tailrotor. If the tailrotor is still "perky" and it is just the main blades, then look towards the motor. I have only cooked one motor, and breaking in the second motor has enabled it to outlast the first one.

In the case of my crappy Century Li Ions, the problem evidenced itself in moth motors.

Knowing now that bringing my packs to less than 9V is bad, I am sure I bruised them.

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