Originally Posted by Maxthrottle
Your the first to post so I have no idea. But if you got the basic model using their way of measure, this would be their version of a 2839. If they rewound the motor to 3000kv they are just trying to improve a few more rpms over the original 2839-2800kv 4S. Those will do the numbers they posted on the side of the basic sport version.
That's my interpretation at least. A true 2839 would perform much better though.
Though I don't have a 4S plane...I purchased a 3d 6S plane.