BrianOK

Hey.
I hope you can help me!
I just bought the new little PNP 2,4GHz Walkera 4#3B V2 Brushless Heli with standard lipo 3,7V 400mah batteries.
It's a totaly new model with brushless motor just arrived from HongKong (EHIROBO.com)
After take-off with fully charged batteries the power is only about 50% and after only 10sec. it's only about 30% or so.
It can fly only about 5-10cm. of the ground.
I'm not an expert in electrics, but the chargingprocedure is pretty simple with a green light when it's fully charged.
I've tried with two different batteries but the result is the same. NO POWER.[:@]
On Youtube it seems to have lots of power.

Please help me I need some advise.

Brian
Denmark

Dr Kiwi

The batteries should improve after a few cycles... if not, then you've been conned. I wouldn't put it past them to have run it for YouTube on 6v rather than 3.7v (more like 3v under load), in order to make it look good!

BrianOK

Thanks.
I'll try some cycles on the batteries.
Well I think 3,7V is OK. You can find many private recordings on Youtube with stock batteries, and they seem to fly OK.

CustomPC

It could be a Speed controller calibration issue.

Many speed controllers need to learn the throttle high and low points through a calibration routine and it's typically the first thing you must do with a new ESC.

Perhaps when you tried the heli for the first time you only advanced the throttle to half way and the ESC thinks that is the max throttle.

BrianOK

Hmm CustomPC that could also be the problem. I've tried 3 batteries now with the same result. So mabye it could be a problem with the charger. I'm having the batteries checked tomorow.
Brian