need help in this post too : http://www.rcindia.org/multirotors/problem-with-kk-2-1-5-board-plz-help-!!/msg286992/#msg286992

And should I replace the proprs with 8045 props or are 1045 props fine ?

Sorry that's not the link refer to this http://www.rcindia.org/multirotors/problem-with-kk-2-1-5-board-plz-help-!!/

Quote from: knvshrm on April 11, 2018, 06:47:14 PM
Sir can you plz give specs of the motors you have used ?

I thought they were 2212 1400kv with 10x4.5.
Sorry for giving wrong info earlier. Had not even looked at the quad in over a year.

Actually they are ST2210, 1050kv from Quadkopters, with 8x4.5 props.

The 10x4.5 props you have may overload 2212 1400kv motors at high throttle (have to check this).
At the rpm required for hover, I don't think they will overload.
If you have a wattmeter you could check the amps draw when just lifting off (on 10x4.5 props)

However, as suggested earlier by others, you should try 8x4.5, or 8x4 that may be easier to get.

1. Can you post a close up photo of your motor showing the label?
2. A photo of your lipo. Is it puffed?
3. A photo of your props. Which make are they?

Tomorrow I'll try to see if I can get 5 minutes of hover time with a somewhat puffed old 2200 lipo.
Regards

No sir the lipo is not puffed.

The props are unbranded sir only the dimensions are written on the props.

No photos I suppose...

Sir when I try to upload photo an error occurs.

Your attachment couldn't be saved. This might happen because it took too long to upload or the file is bigger than the server will allow.

Please consult your server administrator for more information
This is the error

Though on the motor only A2212/10T and 1400 kv is written.

Should I order 8 *4.5 props or stick to these 10 * 4.5 one's ?

It's still showing error will try to upload pictures tomorrow.

See there are two different issues.
1. Will it hover? To check this the 10x4.5s are enough
2. Less duration. Either due to overload or weak battery
To be checked by
a. Reducing load by changing props (actuallythe load at liftoff is the same irrespective of prop, as it is the weight of the quad. Reducing the prop size allows the motors to run at a higher rpm, which may or may not be a good thing.)
b. Changing battery

To hover a 1kg quad, each motor has to produce 250gms thrust.
2212 motors are capable of 700-800gms thrust at full throttle.
So 250gms should be easily possible with a wide range of prop sizes.

My suggestion is
1. Retain existing props
2. Charge lipo to 4.20 per cell, or as close as possible
3. Lift off a little, and hover with as little change in throttle as possible
4. Check duration

Also check what voltage your low voltage alarm is set for...

Sir can lipos clear through customs ? So I can order a new one .

hey,have you bought these motors off amazon or chandni chowk??anyways 10×4.5 is too much for that motor , am also using same specs motor diffrent brand on my copter with a 8×4.5 prop ,copter weighs around 1000grams with a 2200 mah lipo 3s and gives around 7-8 min of hover

I have same specs of the electronics . Got the motors from Rees 52 .

Where can I get 8 * 4.5 props from ??

Hello sir , here are the specifications of the motor :
KV (rpm/volt): 1400
Thrust (g/s) : 1265/4
Efficiency: 80%
Efficiency current: 4-10A (>75%)
Current Capacity: 12A/60s
No Load current @ 10V: 0.5A
Working voltage range: 7- 12v
Shaft Diameter: 3.17mm
Lipo is 2200 mAh 25 c
8 *4.5 props
What flight time will I get plz help.

Will be checking the duration soon .

And sir how will I know when the battery voltage  drops to about 3 volts ? I do not have a low voltage alarm.

Quote from: knvshrm on April 12, 2018, 05:19:17 PM
And sir how will I know when the battery voltage  drops to about 3 volts ? I do not have a low voltage alarm.

On the top left do you have a red connector with one red and one black wire leading to a small black plastic cylinder?
That's the buzzer for the low voltage alarm.

By the way, going down to 3 volts will surely kill your lipo!
Go to Misc settings in the menu and set the battery alarm to 10.5v or higher. (3.5 per cell or more)

Shocking results sir

I got 6 and a half minutes of flight with 10 * 4.5 props. Was moving the quad back and forth and in circles.

@kk iyer
Thanks a lot sir for your help and support.
Regards

Well done