hello everyone, i need to choose a prop for my dys 1400kv brushless motors(specs are below) ,i have a 10X4.5 can i use it??
specs of the motor:
KV: 1400
Configuration: NP
Stator Diameter: 22mm
Stator Length: 8mm
Shaft Diameter: 3.17mm
Motor Dimensions(Dia.*Len): Φ28×26mm
Weight: 44g
No.of Cells(Lipo): 2-4S
Max Continuous current: 26A
Max Continuous Power: 384W
Internal resistance: 0.106Ω

You would be stretching that motor too far on that prop. Go for a 7*4.5, 8*5, or maximum 9*47 SF - the last will draw nearly 30 A

hey rohan.....which battery do you plan to use?

2 3 or a 4 cell

im using a 2200 mah 3s 25C 11.1v lipo...

That motor is the same as this:

http://www.hobbyking.com/hobbyking/store/__12920__D2826_10_1400kv_Brushless_Motor.html

See the prop indicated; same as I told you

@rohan123,
DYS site does not show any 2826 motor of 1400kv, of 44gms and 384 watts.
http://www.dys.hk/ProductShow.asp?ID=30
Their 2826-10, 1400kv (as well as the motor mentioned by Rai saheb) are rated for 205 watts
The pamphlet that came with the Turnigy 2826-10/1400 specifies 7x4 for 3s and 9x4.7 for 2s

Perhaps you may need to verify the motor specs again.
Maybe it is not DYS or Turnigy at all, or maybe it is a different size!

Iyer sir, it's obviously at 4S. 384 watts, @ 26 Amps => 14.8 V

384 watts!  Rai sir aren't we expecting too much from this motor...?

If we go by numbers... 
A 10*4 prop with a voltage of 14.8 (4 cell)  and spinning at 1400 kv would require a motor of 1300 odd watts...

Quote from: docnayeem on September 12, 2014, 05:30:24 PM
384 watts!  Rai sir aren't we expecting too much from this motor...?

Those are not my figures Doc!

IMHO this motor is good for 200 W. Period.

Unless it's a Hacker, Scorpion, AXI; this is just a case of some Chinese manufacturer showing off his size

Quote from: docnayeem on September 12, 2014, 05:39:39 PM
If we go by numbers... 
A 10*4 prop with a voltage of 14.8 (4 cell)  and spinning at 1400 kv would require a motor of 1300 odd watts...

How?

Quote from: sanjayrai55 on September 12, 2014, 05:24:00 PM
Iyer sir, it's obviously at 4S. 384 watts, @ 26 Amps => 14.8 V

@sanjayrai55 sir,
Oops, i missed that!
Surely one would expect DYS and/or Turnigy to publicise 384 watts instead of 205.

@rohan123
Could you post pics of the motor and the spec sheet please?

Sanjay sir... I use a webcalc routinely
http://adamone.rchomepage.com/calc_thrust.htm
Please have a look

I don't agree with it. Reality is something else.

As you know, I do my own testing. I have run a 2826-1400 with a 10*4.5 at 3S, goes to about 24 A.

At 4S will go to about 30 A.

What actually happens is as the motor capacity is reached, the RPM drops. So V drops, the wattage peaks out. If you continue running, it burns out 

Photos of my motor... It says BE2208-1400Kv on it

Item No.   NO LOAD   ON LOAD   LOAD TYPE BE2208-13 (1400KV)   VOLTAGE   CURRENT   SPEED   CURRENT   Pull   Power   Battery/prop V   A   rpm   A   g   W 7.4   0.4   7970   3.4   170   25.2    LiPoх2/6x5E 9.6   340   71.0    LiPoх2/7x5E 10.3   430   76.2    LiPoх2/8x4E 12.1   530   89.5    LiPoх2/9x6E 11.1   0.5   11930   6.3   380   69.9    LiPoх3/6x5E 16.1   580   178.7    LiPoх3/7x5E 17.1   730   189.8    LiPoх3/8x4E 19   835   210.9    LiPoх3/9x6E 14.8   0.5   15880   9.8   640   145.0    LiPoх4/6x5E 22.1   780   327.1    LiPoх4/7x5E 23.5   960   347.8    LiPoх4/8x4E 26   1060   384.8    LiPoх4/9x6E

I think this clears up all. The manufacturers propchart, which should have been posted in the very first place

Sorry sir, i was unable to find this data and the seller suggested 10x4.5 props so i bought them,and now im worried i can damage the motors so help me pleasenn

What do you want to use it on? Give details

Can't get that table right it's all smudged up

Search DYS 2208 1400 KV on google

Quote from: sanjayrai55 on September 12, 2014, 06:32:46 PM
I don't agree with it. Reality is something else.

As you know, I do my own testing. I have run a 2826-1400 with a 10*4.5 at 3S, goes to about 24 A.

At 4S will go to about 30 A.

What actually happens is as the motor capacity is reached, the RPM drops. So V drops, the wattage peaks out. If you continue running, it burns out 

Sir actually when you shift from 3 cell to 4 cell the current drawn drops and does not increase...  If motor and prop setup is the same....

Rohan- the props will work on a 2S with no problem. On a 3S they should be OK, but you should check with a wattmeter

Doc Nayeem: Have you tried this with measurement?

Quote from: sanjayrai55 on September 12, 2014, 07:14:34 PM
Doc Nayeem: Have you tried this with measurement?

Sir logically
I (current) * V(voltage) = W(Power)
So when power consumed is the same (w)  is constant in both the cases... If V increases.. 'I' has to decrease..