Bench test session with 2700 Kv plus motors and 6x3 EMP/TGS/KMP prop

Hi Everyone -

I recently completed a fairly significant test session going back through all the quad racing motors I have been testing that are 2700 Kv or higher and testing them with the 6x3 EMP prop.  If you click on this previous link, it will take you to the RC Timer site, these props are also available under different names TGS from Hobby King and KMP from Banggood.  I normally buy mine from RC Timer as although you have to buy them in bundles of five, they are much cheaper.

I had wanted to do this for awhile, and was finally pushed to get it done after recently bench and field testing the Hawksky AT2306 II 2750 kv motor.  You can read more about this motor, my initial impressions and bench testing at this blog post.  Here is some flight video I shot with this prop and motor.

Here is the list of 2700 and over Kv motors I tested on the bench recently.

• EMAX RS 2306 2750 Kv;
• Foxeer DATURA X2206 2700 Kv;
• BeeRotor Z2207 2780 Kv;
• Brother Hobby Returner R2 2205 2800 Kv;
• Racerstar BR2306S 2700 Kv; and
• SunnySky Edge R2305 2800 Kv. 

All of the motors except the Brother Hobby 2800 showed marked improvement in thrust while doing so more efficiently compared to the 6x4 APC gas prop.  The Brother Hobby motor performed worse with the 6x3 prop.  I suspect due to it's smaller size stator, it needs the 6x4 prop to really push the motor to better levels of performance.  You can read the full details of all the test numbers on the motor test spreadsheet.  

The EMAX RS2306 2750 Kv motor continues to be a very good performer and actually with this prop preferred the Turnigy AE-45A ESC with custom settings of 22.5 degrees and 24 KHz PWM frequency over the more expensive HobbyWing Platinum PRO 40A ESC that it preferred with the 6x4 APC gas prop.  All of these results are on 3S.  The EMAX motor still has the best 50% throttle performance although it did not increase significantly over the 6x4 APC gas prop.  It had a significant increase of 125 gr of thrust at full throttle with the 6x3 prop.

EMAX RS2306 2750 Kv motor with 6x3 EMP prop, Turnigy AE-45A ESC on 3S

50% throttle - 16.4A/197.5W producing 650 gr/22.9 oz of thrust;

100% throttle - 36.5A/416.3W producing 1200 gr/42.3 oz of thrust.

The pleasant surprise is the very inexpensive Racerstar BR2306S 2700 Kv motor.  It showed a 20 gr improvement in mid range thrust and 115 gr at full throttle.  I will keep an eye on it as it is pulling 37.1A at full throttle which might be a bit more than it is designed to handle, but anytime I see anything close to 1100 gr of thrust it makes me take notice😀

Racerstar BR2306S 2700 Kv motor with 6x3 EMP prop, Turnigy AE-45A ESC on 3S

50% throttle - 12.3A/153.8W producing 525 gr/18.5 oz of thrust;

100% throttle - 37.1A/459.8W producing 1080 gr/38.1 oz of thrust.

The real star of the show is the SunnySky Edge R2305 2800 kv motor showing a 50 gr increase in thrust at mid range and a whopping 185 gr increase in thrust at full throttle while drawing 5 less amps than it did with the 6x4 APC gas prop😲  It produces the most thrust at full throttle by 50 gr compared to the EMAX motor.

SunnySky Edge R2305 2800 Kv motor with 6x3 EMP prop, Turnigy AE-45A ESC on 3S

50% throttle - 14.2A/172.5W producing 615 gr/21.7 oz of thrust;

100% throttle - 40A/456.8W producing 1250 gr/44.1 oz of thrust.

So I am excited now to do some more field testing, first up will be the SunnySky Edge motor, it ripped with the 6x4 APC gas prop, so if the thrust is that much better with the 6x3 EMP, it should move along pretty smartly😉

Park Jet noise...the "other" sound of freedom😎

Cheers,

Scott