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Old May 08, 2014, 07:21 PM
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Originally Posted by rpmrpm View Post
Like wise, do not want to dilute this thread. But I have had experience with the Cobra 2204-1960Kv and for the last couple days have been flying the 2204-2300Kv multirotor version. I have 2 videos posted with flights and info. While I'm no SOMA I give them my best.

No video imbed for reason above, but link to my channel.
Look for "mini ACRO" and "Hurricane 4PQ"
https://www.youtube.com/user/rpmrpmtube
Nice reviews and flying mate. The Cobras are definitely performing. I think discussion on the Cobras is well on topic here as a comparable motor to the Sunnysky, and most welcome on my behalf


Quote:
Originally Posted by EngineerX View Post
I ordered some of the 1960KV last night, I found this vendor advertising in the Sales forum and prices look ok @ $20 each + $13.50 shipping to USA
Cobras much better now that the prop adapters are included and after watching the Boris video and your thrust test on HQ 5x4's these are looking like a good 4S setup, same here, I'm going to test to see what kind of thrust these put out on 4S/ 5x4

http://www.rcgroups.com/forums/showthread.php?t=2160554

http://www.dronematters.com/index.ph...ss-motors.html

BTW, check out the response from GemFan....let's see if they fix those floppy props
Yes and the MR version also has M3 16-19mm mounts too. I'm looking forward to testing the combo above as well, and will have the chance now thanks to the generosity of dklein!

edit... Interesting on the Gemfan response too. Great they saw the video as I think it shows a good comparison between the rigidity of the props.
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Last edited by Soma; May 08, 2014 at 07:31 PM.
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Old May 08, 2014, 09:01 PM
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Originally Posted by p0st4L View Post
Just throwin' it out there.

I have about 300 2204's im gonna throw up on MRSS @ 5pm PST.
Did you get my PM about the frame dimensions mate?
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Old May 08, 2014, 10:15 PM
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Originally Posted by p0st4L View Post
Just throwin' it out there.

I have about 300 2204's im gonna throw up on MRSS @ 5pm PST.
3 hours later and it looks like they are all gone. Bummer.
Mike
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Old May 09, 2014, 02:26 AM
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That's pretty annoying about the 6030 props.. I purchased a stack of them a little while ago under the assumption that they'd perform to a similar standard as the GF5030 props.. :/

Edit: Thinking out loud here:- this is a static test, which doesn't really capture how the prop behaves in flight.. and of course, even more important than peak thrust is efficiency around 40-50% where most of the time they'd be in use on a Quadcopter...
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Old May 09, 2014, 02:44 AM
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That would have an affect I reckon. If you had a light copter and took it slow they should be good.

The static condition does put a big load on the motors and props, it would only see that in flight in stopping a fast decent with full throttle I would imagine?

I was glad I only bought one pair... Until another few sets turned up I forgot I bought!
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Old May 09, 2014, 04:21 AM
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self edit.. too far off topic for my liking.
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Last edited by Gibbedy; May 09, 2014 at 06:40 AM.
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Old May 09, 2014, 01:50 PM
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Originally Posted by Felixrising View Post
That's pretty annoying about the 6030 props.. I purchased a stack of them a little while ago under the assumption that they'd perform to a similar standard as the GF5030 props.. :/

Edit: Thinking out loud here:- this is a static test, which doesn't really capture how the prop behaves in flight.. and of course, even more important that peak thrust is efficiency at 40-50% where most of the time they'd be in use on a Quadcopter...
True.... but, with quads if you fly a bit aggressive you'll often be within the load envelop that causes the props to flex, as Soma says, anytime you change direction abruptly it'll load the prop airfoils and they'll flex for sure

Quote:
Originally Posted by Soma View Post
Yes and the MR version also has M3 16-19mm mounts too. I'm looking forward to testing the combo above as well, and will have the chance now thanks to the generosity of dklein!

edit... Interesting on the Gemfan response too. Great they saw the video as I think it shows a good comparison between the rigidity of the props.
M3 mounts make it even better, who uses those silly 2mm bolts anyway .... they're too small to handle by our manly hands!

-Too bad GemFan didn't offer to take my 10 pairs of props and send me the revised ones... if they ever do make them stiffer, ha!
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Old May 09, 2014, 06:04 PM
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Originally Posted by EngineerX View Post
M3 mounts make it even better, who uses those silly 2mm bolts anyway .... they're too small to handle by our manly hands!

-Too bad GemFan didn't offer to take my 10 pairs of props and send me the revised ones... if they ever do make them stiffer, ha!
M2 is so darn expensive too!

Quote:
Originally Posted by Gibbedy View Post
self edit.. too far off topic for my liking.
No worries mate, just getting to reply. The 'mini' motors are a mess with mount hole specs. 12x12, 12.4x12.4, 14x14, 12x16!!! Slots is the only way to deal with them. Tiger seems to be standardising on 12x16mm (Except for the 1306) so this is good.

However the bigger motors have the 16x19 M3 mounts which are more universal. The problem is there's no standard orientation so they need slots too, unless you can flip the arm over, then you can just use the dedicated 16-19mm pattern, which is stronger.
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Old May 09, 2014, 06:13 PM
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Just linking this test as a good comparison...

http://www.rcgroups.com/forums/showt...2#post28074183

Quote:
Originally Posted by Menno View Post
I have had the pleasure to test the new Cobra C2204/28 2300kv motor on my mini quadcopter for the last month. Before you skip to the conclusion; it's a great motor! But so is the Sunnysky X2204S motor. So how do these 2 motors compare?

The Sunnysky motor has been reviewed and tested multiple times, but often there is only a mentioning of maximum thrust and not how this thrust has been achieved. RCGroups user Soma has made the most comprehensive test that I have seen till now, but it's made with big LiPo batteries connected in parallel. Although the test data is true and I have very much respect for all the work that he is doing, it's unlikely that you will ever see the maximum thrust on your mini quadcopter with a smaller LiPo. A good indication is the voltage reading at full throttle.

So I decided to do a test of my own. Put both motors on the same test bench, run the test with the same LiPo and Propellers and use the same diagnostic tool; a Hyperion E-meter II.

The test program that i ran was as follows:
- go full throttle for 5 seconds;
- back throttle down to 400 grams of thrust and hold for 10 seconds
- back throttle down to 350 grams and hold for 10 seconds again
- step it all the way further down with increments of 50 gram and 10 seconds of constant thrust.

Here is the data that I collected:


So with the Gemfan 5030 ABS propellers differences between the 2 motors are minimal. The Sunnysky motor appeared to run slightly more efficient and the Cobra motor had slightly more punch. In my opinion the differences are so small that they can be neglected. I think it will come down to long term performance.

On a sidenote; there are a lot of topics on RCGroups about the compatibility of the Sunnysky motors with some versions of the SimonK firmware. The 2013-05-05 version seems to be accepted as the most stable one for this motor at this time. The 2300kv Cobra motor's that I am flying on my test quadcopter run well on both the 2013-05-05 firmware as on the newer 2014-03-06. I have not had the slightest indication of desyncing on either of the versions.

I hope to gather more information with some different propellers soon.

Here is a picture of the 2300kv version of the Cobra motor.


The well known Sunnysky C2204S 2300kv motor.


updated on April 15th in post #4
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Old May 14, 2014, 08:46 AM
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Hi guys, has someone test x2204 on 4s? Are these motors able to manage 4s on 5x3 props?

Thanks.
Max
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Old May 14, 2014, 11:59 AM
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United States, CA, Downey
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Originally Posted by Pozzix View Post
Hi guys, has someone test x2204 on 4s? Are these motors able to manage 4s on 5x3 props?

Thanks.
Max
I want to run my x2204's and HQProp 5x4 on 4S. Waiting on someone to be the guinea pig first lol.
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Old May 14, 2014, 12:03 PM
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Originally Posted by pFrancisco View Post
I want to run my x2204's and HQProp 5x4 on 4S. Waiting on someone to be the guinea pig first lol.
I'm would be happy on 5x3 first😆😆

Max
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Old May 14, 2014, 12:57 PM
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Originally Posted by pFrancisco View Post
I want to run my x2204's and HQProp 5x4 on 4S. Waiting on someone to be the guinea pig first lol.
Spent a couple of days trying to tune the cobra 2204 2300kv's with hq6x3 on a 240mm frame. Getting oscillations at high power no mater how I tune. Something strange going on... If it turns out to be a crook motor these are going straight on the blackout frame with 4s
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Old May 14, 2014, 04:35 PM
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United States, CA, Los Angeles
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Info

Browsing YTube ran into this new motor hoping to enter the mini quad craze:
http://www.emaxmodel.com/views.asp?hw_id=1460

Comparing factory specs to Soma's results:
eMax1806 / SS2204
GFCF5030: 380g @ 8A / 441g @9.4A
FC5045?: 410g @ 10.6A / 561g@16A

Same price as SS2204 and not yet proven quality/ longevity. SS still best bang for the buck!




Emax Mini Quad Motors (1 min 33 sec)
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Old May 14, 2014, 04:48 PM
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Anyone guys? Soma did u tested on 4s?

Thaaaank you :-))))
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