After burning out my Cobra C-2221 in a crash, I replaced it with an EMax 2815-06 (1280 kV) as the Cobra was not available locally. This motor is 32g heavier, but more powerful. Furtunately it’s shorter than the Cobra, so the increased weight does not change the position of the C of G by much.
Here is the eCalc model.
This configuration flies fine, although I must admit that I preferred the physically smaller Cobra motor, which was a better fit to the long range cruiser role.