raw stock flamewheel with naza 8" 4s or 10" 3s, add fpv gear, gopro, needs 9" 4s, 10" 3s,,,,,, add a second battery getting up to 2.5kg your needing 9" starts slacking and needs 10", but sooner or later the stock motors run out of oomph to do it. the 2212 that come in the arf are lik 120-150...