I had my thrust stand out today doing another round of testing, this time with the EMAX RS2306 2750 Kv motor which is by a narrow margin the most powerful quad racing motor I have tested thus far😊 It is the motor I have been running in my RC Powers T50 V5 for the last couple weeks.
Today, I tested this motor with the 6x4 APC gas prop, the Hobby King 6x4 APC style electric prop, and the 6x4 KMP prop from Banggood. I tested each prop using the Turnigy Plush 40A ESC and then the HobbyWing Platinum PRO 40A ESC. Some very interesting and also somewhat puzzling😕 results, but the numbers are what the numbers are.😉
All tests were done using the Gens Ace 2200 3S 45C battery. The timing on the Turnigy Plush is at low (factory default), the HobbyWing ESC is set at 26.25 degrees and PWM (pulse width modulation frequency) is set at 8KHz. These are not factory defaults, you can read more about my previous experimentation with the HobbyWing ESC in this blog post.
This motor definitely likes the HobbyWing ESC with the settings I have set, it has marked improvement at 50% and full throttle with all three props compared to their performance with the Turnigy Plush.😀
The overall best combination proved to be the 6x4 KMP prop with the HobbyWing ESC. Numbers are below (you can also read the full details on my motor spreadsheet).
50% throttle - 18.3A/219.4W producing 635 gr/22.4 oz of thrust; and
100% throttle - 41.6A/482.7W producing 1120 gr/39.5 oz of thrust.
This is where it becomes a bit puzzling, as the numbers with the 6x4 APC electric knock off from Hobby King are nearly identical, same top end thrust, just 5 gr less at 50% throttle. The 6x4 APC gas prop with the HobbyWing ESC produced 1075 gr/37.9 oz of thrust😕 Still decent numbers, but the 6x4 APC gas prop pulls 42.6A to produce less thrust in this situation, so a bit puzzling after the 6x4 APC gas prop performing so well for me to date.
Some of these amp number exceed 40, but this ESC has a 60A burst rating and normally, in the air the rule of thumb is that there will be about a 25% drop in amp draw, so 42.6A would become about 32A. I will check the ESC regularly for heat build up. According to the HobbyKing website, the EMAX RS2306 2750 Kv motor should be able to handle up to 58A if you click on the "Product Specifications" tab when you open the link to the motor.
The best prop with the Turnigy Plush ESC turned out again to be the 6x4 KMP prop, then the 6x4 APC electric, then the 6x4 APC gas. So comparing my results with rcplanepirate's, the main difference is my stand tests in a "puller" configuration, perhaps in the air with a "pusher", the 6x4 APC electric won't perform as well or differently? I certainly know from testing it with several other motors with the Plush ESC at the field, the 6x4 APC gas has proven to be a very good performer in the air. Only one way to find out, so time to put the motor back in my T50, put the HobbyWing ESC in there and get it out to the field with all three props and see what is what😀 The 6x4 APC electric and 6x4 KMP are certainly louder than the 6x4 APC gas prop, so time for a "fly off"😉
Park Jet noise...the "other" sound of freedom😎
Cheers,
Scott
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