Thrust Test: Blackout MN2208 2000KV and Cobra CM2208 2000KV - RC Groups
Thread Tools
Nov 16, 2014, 03:55 AM
Registered User
Data

Thrust Test: Blackout MN2208 2000KV and Cobra CM2208 2000KV


If this is your first time reading my thrust tests, please see my SS/Hovership 2204 2300KV thread which explains my testing methods, goals, and philosophy.

I leave it up to the reader to draw their own conclusions about the motors and props. These tests aren't meant as a "versus" shootout. In this particular case, both of these motors are quite nice. I'll provide brief "take aways" at the bottom which will include my observations. Other than that, I will do my best to leave my personal opinions out of it and let the data speak for itself.

Feel free to ask questions - there is plenty to talk about regarding these motors!








Notes:
For these tests I used ZTW's Spider ESCs which were factory flashed with a late 2013 version of SimonK. I didn't experience any sync issues whatsoever and will be using these ESCs for my 4S setups, especially now that they have a 12A version. They're a perfect alternative to KISS ESCs.

Be careful though- apparently they're now flashing their own custom SimonK firmware which is not playing nicely with the high KV mini motors. They call these "version 2" of the Spiders, but in reality the only change is that they're flashing their new custom firmware (no hardware changes). I'm going to push for them to revert back to standard SimonK firmware versions. I also hear the latest 2014 version has been working well on 4S/high KV when flashed on these Spiders.

I also decided to no longer test the carbon mix versions of the HQProps as the glass composite is more efficient and only producing slightly less thrust (maybe 10g's less). I'm also no longer testing the "FC" brand 6045 props because HQProp's offering is superior.

Take Aways:
  • As you can see, the results are pretty similar. The main difference I noticed is that the Blackout motors are willing to take on more power and thus produce greater thrust. The minor efficiency loss as a result of this is arguably acceptable.
  • The GemFan 6030 props produce greater thrust than the HQProp 6030 props. Be sure to examine the power draw differences.
  • During testing, I noticed the GemFan 6030 props handle higher RPM as a result of 4S much better than the HQProp 6030 counterpart. The HQProp 6030 props simply do not perform well at high RPMs. They seem to not catch the air effectively. I may post a video of this later. At this point, I'm certain I wont ever use HQProp 6030 on any 4S-powered motor. Ah, also, HQProp 5040 didn't cope well with the high RPM either. However...
  • HQProp 6045 on 4S shined! Grabs and maintains the air perfectly and sounds healthy. I will always run this configuration from now on. Obviously power hungry and exceeding design specs, but this is the data I'm trying to discover.
Last edited by foobarbazqux; Nov 22, 2014 at 07:56 PM.
Sign up now
to remove ads between posts
Nov 16, 2014, 05:22 PM
:)
Nice one mate!

Great testing, thanks!
Nov 16, 2014, 06:01 PM
Registered User
JulianGoesPro's Avatar
Impressive! Thank you

I am not that up to date with SunnySky Motors, but is there something SS priced in that power "dimension"?
Last edited by JulianGoesPro; Nov 16, 2014 at 06:10 PM.
Nov 16, 2014, 06:32 PM
:)
The SS2207 2100 & 2700KV's have just recently been announced
Nov 16, 2014, 06:58 PM
Registered User
JulianGoesPro's Avatar
Quote:
Originally Posted by Soma
The SS2207 2100 & 2700KV's have just recently been announced
hm... interesting

Soma, foobarbazqux? Up for a new test?

Nov 16, 2014, 07:04 PM
Registered User
Yes of course JulianGoesPro- always down to discover some data.

Thanks Soma for making me aware of those. I have some preliminary tests for SS 2208 2600kv already too. Once I get those new ones, I'll test them all.
Nov 16, 2014, 07:59 PM
Registered User
JulianGoesPro's Avatar
Quote:
Originally Posted by foobarbazqux
Yes of course JulianGoesPro- always down to discover some data.

Thanks Soma for making me aware of those. I have some preliminary tests for SS 2208 2600kv already too. Once I get those new ones, I'll test them all.
Nice, sounds like 2208 would be a bit heavy for 3S only use but 2600kv could be too hard on those HQ6045 with 4S^^
Nov 16, 2014, 08:04 PM
Registered User
Here's the initial data for SS 2208 2600kv:

6030 on 3S
覧覧覧覧覧
50%: 360g of thrust, 6.3 amps
75%: 552g of thrust, 10.4 amps
100%: 828g of thrust, 17.7 amps

6045 on 3S
覧覧覧覧覧
50%: 457g of thrust, 8.4 amps
75%: 797g of thrust, 18 amps
100%: 1165g of thrust, 31.3 amps

6045 on 4S
覧覧覧覧覧
50%: 680g of thrust, 12.1 amps
75%: 1091g of thrust, 24.1 amps
100%: 1529g of thrust, 39.1 amps


I ran those tests on a 12amp BlueSeries ESC too! 39amps through it!
Nov 16, 2014, 08:14 PM
Registered User
JulianGoesPro's Avatar
Quote:
Originally Posted by foobarbazqux
Here's the initial data for SS 2208 2600kv:

6030 on 3S
——————————
50%: 360g of thrust, 6.3 amps
75%: 552g of thrust, 10.4 amps
100%: 828g of thrust, 17.7 amps

6045 on 3S
——————————
50%: 457g of thrust, 8.4 amps
75%: 797g of thrust, 18 amps
100%: 1165g of thrust, 31.3 amps

6045 on 4S
——————————
50%: 680g of thrust, 12.1 amps
75%: 1091g of thrust, 24.1 amps
100%: 1529g of thrust, 39.1 amps


I ran those tests on a 12amp BlueSeries ESC too! 39amps through it!
wow that is insane! not sure my 12A EMAX would survive that^^
That would my give my 260mm quad with its 1,3Ah 3S 45-90C nano-tech a new "insane" felling ... even on 6030 props (though the grey gemfan 6030 may not survive that rmp^^)
Nov 16, 2014, 08:25 PM
Registered User
I've found that those grey 6030 GemFan's produce more thrust than the HQProp version too!
Nov 17, 2014, 12:15 AM
Registered User
JulianGoesPro's Avatar
Quote:
Originally Posted by foobarbazqux
I've found that those grey 6030 GemFan's produce more thrust than the HQProp version too!
So those 828g Thrust at 17.7Amps where with gemfan6030 grey? Niiiice
Nov 17, 2014, 01:00 AM
Registered User
Quote:
Originally Posted by JulianGoesPro
So those 828g Thrust at 17.7Amps where with gemfan6030 grey? Niiiice
Nope, actually those are with HQProp 6030! So, the thrust would likely be 75-100g more with the GemFans. However, these GemFans are dangerous. They're prone to exploding at high RPM. I had one explode on me tonight in other tests. Read the latest posts in my SunnySky thread, and also the new thrust test thread I just posted tonight.
Dec 13, 2014, 08:26 PM
Registered User
JulianGoesPro's Avatar
Quote:
Originally Posted by foobarbazqux
For these tests I used ZTW's Spider ESCs which were factory flashed with a late 2013 version of SimonK. I didn't experience any sync issues whatsoever and will be using these ESCs for my 4S setups, especially now that they have a 12A version. They're a perfect alternative to KISS ESCs.
I am interested in those ESCs as well so could go a bit more into details why they are "a perfect alternative to KISS ESCs"
Dec 13, 2014, 08:32 PM
Registered User
Quote:
Originally Posted by JulianGoesPro
I am interested in those ESCs as well so could go a bit more into details why they are "a perfect alternative to KISS ESCs"
It's hard to find an ESC that can keep sync with high KV motors and on 4S especially. KISS ESC, Rotorgeek's BLHeli-flashed ESC and the Spiders are the only ones I know for certain play nicely with high KV and 4S.

There is a newer SimonK that may work well with the Blue Series ESCs, but I haven't had a chance to personally test it. For reference, older mid 2013 version of SimonK flashed to Blue Series ESCs has been known to work well with high KV motors on 3S.
Dec 13, 2014, 09:18 PM
Registered User
JulianGoesPro's Avatar
Quote:
Originally Posted by foobarbazqux
It's hard to find an ESC that can keep sync with high KV motors and on 4S especially.
Ah, thank you for clearing that up!

I am rocking the 12A EMAX ESCs and though they are advertised as SimonK they are running BLHeli and I was able to run my EMAX MT2204 2300kv without a problem on 4S.

With all this talk about cleanflight I may have to buy those Kiss anyway... (but not a priority at all)