I’m building a new race quadcopter since I want more performance than my current one (3S with 1804 motors). I decided on EMAX RS2205 motors with DYS XM20A ESCs. I went with the EMAX NightHawk 200 frame because I like the lower top plate to keep the CG close to the center. The 4mm bottom plate should be strong enough to hold for most crashes as well.
So I decided to get a few different 5” props and do a comparison, unfortunately HK has annoyingly low limits until you get “parcel too big, please split into two orders” errors, so I could only fit 3 different types this time. I’ll update this post if I order more later on.
I’m running the motor from a 4S 4400mAh 65-120C to be sure that the battery doesn’t limit the current draw. I’m measuring current and effect with a Turnigy 130A Watt Meter and Power Analyzer that I can’t find on HK any longer. I’m also measuring the RPMs with a Turnigy Tachometer but I don’t know how good my measurements were, it seemed a bit flaky, maybe due to low lighting. I didn’t include all the data in these graphs, but everything is available in a Google Docs spreadsheet.
The props I tested was a spare EPP5030 from my old machine, a Gemfan 5045BN, a Gemfan 5046BN and a brutal Gemfan 5550BN. Note that the 5550 will not fit the EMAX 200 frame since it’s too large at 5,5”.
I obviously wouldn’t recommend the 5550BN when using a 20A ESC since it pulls over 40A at full throttle, even the 5046BN is a bit high at 33,8A, but the 5045BN should be safe, since most 20A ESCs should be able to handle burst currents of around 25~30A.