The two motors in this category are quite different, but when matched with the right prop are very similar in performance in the air. They provide about 10-15% more speed and power than our "mild" setups and about 10-15% less than our "hot" setups and provide some versatility of prop selection depending on what you are looking for. In this post I will try to best summarize my experience flying over a hundred flights with each of these motors testing different prop combos. You can also sift through our motors and props threads to find more details if you want, or if you have any questions, please feel free to e-mail me at firstname.lastname@example.org. If you click on the picture of the motor below, it will take you to the website where they were purchased if you want more specific information.
Gear Best 2212/5T 2700 (GB 2700)
This motor arrives without bullet connectors, so you will have to provide your own. The prop collets/adapters have been fairly decent on the ones I tested, but again I would recommend having some spares. At times the ones that come with the motors are especially cheap and soft and make it difficult to properly secure the prop to the motor. Also, good to have a spare "X" motor mount and screws as sometimes these motors arrive without them. You need prop adapters for a 3.17 mm shaft, you can find sources for all these spare goodies on our recommended parts list. This motor with "X" mount and prop collet installed weighs 66 gr/2.3 oz.
DYS BE2208/7 2600 Kv (DYS 2600)
This motor arrives with all the hardware including connectors. It is a bit more expensive than most motors, but the quality is obvious with very smooth bearings and finish on the motor. The provided prop adapter is good quality, but I would recommend getting a replacement anyway just in case, you will need an adapter for a 3.0 mm shaft.
It is a slightly smaller motor, at least based on the measurements of the stator which is 4mm shorter in length than the GB 2700 motor. It is a bit lighter at 56 gr/2.0 oz, but since it works best with the heavier Master Airscrew 6x4x3 prop, it is pretty much equal to the GB 2700 setup weight wise once it is in the plane.
Bench test data
I will only provide data for props I have tested and would recommend at the field depending on the flight performance or amp draw you seek. The GB 2700 is probably the most versatile for prop selection, it can spin the 6x4 APC prop OK, but it does push the motor pretty close to it's limit, so it is prudent to check the motor for heat build up on a regular basis when using the 6x4 APC prop, especially in warmer temperatures.
The DYS 2600 motor is like two different beasts depending on the prop you use, it seems to be ideally suited to the Master Airscrew 6x4x3 prop, as you can see from the numbers below, it is actually very inefficient spinning the 6x4 APC prop.
All bench test data was completed with a Turnigy Plush 60A ESC with timing set to low and a Zippy Flightmax 2200 3S 40C battery. I fly with a Turnigy Plush 40A ESC with both these motors no matter the prop choice. You will find links to all the props tested below on our recommended parts list.
GB 2700 data
6x3 EMP prop
50% throttle - 13.2A/163.2W producing 500 gr/17.6 oz of thrust;
100% throttle - 30.4A/365.6W producing 960 gr/33.9 oz of thrust.
6x4 APC prop
50% throttle - 13.1A/157.8W producing 410 gr/14.4 oz of thrust;
100% throttle - 33A/379.4W producing 770 gr/27.2 oz of thrust.
RC Timer 6x3x3 carbon prop
50% throttle - 15.3A/190.1W producing 500 gr/17.6 oz of thrust;
100% throttle - 29.4A/343.4W producing 840 gr/29.6 oz of thrust.
So how do these props perform at the field? Despite what the bench test numbers show, the top speed with all three props seems about the same, not really that noticeable a difference with the naked eye anyway. Until I tried the RC Timer 6x3x3 carbon prop, I actually preferred the "feel" of the 6x4 APC prop overall. For best pop and acceleration, the 6x3 EMP is definitely the best of the three. The acceleration with the RC Timer 6x3x3 is very linear as it is definitely the stiffest of the three props. The motor does run a tiny bit cooler and more efficiently based on the amount of "gas" left in the battery after landing with the RC Timer 6x3x3 prop than the other two. As mentioned, I would definitely use a 40A ESC with any of these three props and a battery that can produce 50+A discharge to give yourself a bit of overhead.
I will admit I haven't done a lot of prop testing with this motor, I bought it specifically to use with the Master Airscrew 6x4x3 prop as I had read about and watched other fellows on the RC Powers forum discuss how great a combo it was. I had to troubleshoot some issues with either connectors or a bad ESC in the first 15 or so flights with this motor, but since then it has run really well with the MA 6x4x3 prop. I tested the 6x4 APC as a baseline primarily.
6x4 APC prop
50% throttle - 11.8A/140.8W producing 405 gr/14.3 oz of thrust;
100% throttle - 30.2A/364.8W producing 710 gr/25.0 oz of thrust.
Master Airscrew 6x4x3 prop
50% throttle - 12.1A/145.2W producing 425 gr/15.0 oz of thrust;
100% throttle - 29.9A/338W producing 922 gr/32.5 oz of thrust.
This is a bit of a head scratcher for me, but a good study in how different prop styles even of the same pitch can provide different results. On the two bladed 6x4 APC prop, performance in the air was about equivalent to a 2212/6 2200 Kv size motor, maybe even a little less and the motor certainly needed to pull far more amps to get that sort of power and speed, so not very efficient at all. You would be better off using a 2212/6 2200 Kv motor with a 6x4 APC prop if you wanted thrust in the 25 oz/710 gr range.
However, with the Master Airscrew 6x4x3 prop, there just seems to be some sort of magic happening, the speed is very close to any of the prop choices with the GB 2700, so that is the only reason I put it as a choice in the "medium" category of motors. It actually runs a bit cooler and more efficiently than the GB 2700 with any prop tested, but is quite a bit more expensive, at time of writing it is $13.41 USD, whereas the GB 2700 is $6.58 USD. It is relatively quiet with the MA 6x4x3 prop compared to the GB 2700 on the 6x3 EMP or 6x4 APC. Again, I would only run this DYS 2600 motor with a 40A ESC regardless of which of the two props I tested you decide to use and a battery that is capable of delivering 50+ amps to be on the safe side.
Here are a collection of videos that might put the speed into perspective with these motors and a couple of props. Sorry, no video of the GB 2700 with 6x3 EMP or RC Timer 6x3x3 carbon props or the DYS 2600 with the 6x4 APC prop. If I shoot video with those motor and prop combos, I will add them at a later date.
GB 2700 with 6x4 APC prop
This flight was cut short a bit as I was still sorting out issues with the motor "skipping" and "missing", shortly after this video was shot, I sorted the problem out and it has run strong for more than 100 flights now.