Pmax 630kv PDRM5858-630

Optimized for 8S packs (or a pair of 4S packs in series), you'll see about 1850RPM using a LiHV packs (4.35V/cell) and flight times of about 7 minutes. This is a very high performance setup for all but those gonzo nuts for 3D.

At ø58 x 58mm long, this massive motor is expressly configured with a ø6 x 42mm long motor shaft (ø10mm internal) for 600/700-class model helicopters and thus, isn't supplied with a fixed-wing prop-adapter or mounting hardware. That said, these accessories are readily available, and this motor is fantastic for airplane-use as well.

Unlike motors where a button-pusher monitors an automated winding machine loaded with multi-strand wire, this one is hand-wound with a single-strand (6-turns) of ø1.47mm wire. This requires special tools and a skilled craftsman, effectively making it a custom motor. Since winding the 12-tooth stator by hand is finicky and time consuming work, this is a limited production item so please call for availability.

Packing the stator poles with thick wire is what gives this motor the ability to handle a lot of current - e.g. perform a lot of work. After all, the sole reason for using a single-strand is achieving maximum performance. Anyway, depending on the battery pack, this motor is well suited for scale, sport, hot-sport, and extreme-3D maneuvers.

At 490g and capable of outputting 4750W (about 6.37 hp), what results is sufficient power reserve for pretty much any maneuver you can imagine. By way of comparison, an OS MAX 1.05HZ-R engine on 30% nitro makes about 3.75 hp. However, it weighs 596g and costs $530 (plus another $230 for the 185g muffler).

Finally, a suitable ESC (electronic speed control) will typically be of 120-200A capability, and due to the high specific power output, you'd be well advised to lubricate the bearings (a wear item not covered by warranty) each time you go to the flying field (a needle oiler makes this quite easy - these are readily available at hobby shops that cater to RC cars and trucks).