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• RCX SE2205 2400kv

MyRCMart has released an updated version of their popular 2205 economy motor, with new magnets and stronger bell materials, as well as some new KV ratings. This 2400kv was sent over by MyRCMart for testing.

Check out the full list of motors in this series here

Summary

The original H2205 motors caught my eye last year when they first came out due to their insanely light weight. These were some of the first motors I tested here on MQTB. The H2205 series went on to be quite successful, especially the 2633kv version, being one of the first light 2205 high KV motors on the market.  The popularity of the series of motors exposed some issue however, related to the softness of the material, as well as the method of attachment between the bell and the motor shaft.  MyRCMart responded to the issues and released several revisions to the bell design, and upgraded the materials along the way.  This SE2205 motor is the culmination of all of those changes,with the dual set screws on the bell, the upgraded 7075 aluminum and N50SH magnets. In addition to the upgrades from the H2205 v3, the SE motors also have adjusted the KV a bit higher, to 2400kv and 2700kv, from 2350kv and 2633kv. The build quality is still very surprisingly high for the low price of these motors, showing dynamic balance, and excellent machining.  Bearings have always been a hit-or-miss point on these economy motors, but all of the motors I received were smooth,with no notchy spots or looseness in the bearings, and no vertical play. The air gap is decent, but not quite the same level of tightness that you'll see in the modern batch of high performance motors, and the magnets are fairly thin and not arc magnets. The weight hits the same insanely light mark at 25g with wires, and lower cut short. Overall, for the price and weight, these are great looking motors.

Now on to the bench results!

Test Results

The H2205 series was not amazingly powerful, for the most part focusing on light weight and minimizing cost more than making a top performing motor, as well as the fact this was in the days of weaker magnets and lower expectations.  This SE2205 motor however, represents a signficant increase in performance, gaining about 200g on the heavier props over the first generation of motors.  The motor is still falling about 60-100g below the new generation of N52 motors, but given the slightly weaker magnets being used and the lack of arc magnets or super tight air gaps that are present in the current top performers, it's still some very respectable results.  Also interestingly enough, even though the numbers weren't amazing, the motor is showing fairly fast response times, likely due to the extremely light weight design.  Also interestingly enough the current draw is about the same as what we saw in the first generation Emax RS motor, even though thrust is a decent bit lower, so efficiency is going to be a bit down on this motor.  Again though, the light weight will likely make up for that difference in flight, as unloading will be very different between a 25g motor and a 30g motor when it's on a quad in the air.  Overall there were some very respectable results here, and given the price and weight of this motor this latest version remains an excellent budget option, filling essentially the same nitch now that the original did last year against previous generation of motors.