I have about 5 flights on it so far before winter set in. So far it is enough. I feel like if I add it will need more. I know of 2 others flying on the 210 and they seem to be good also. You can see a you tube on the BVM Jet page of the General Dynamics one at KY jets. It has a gen 1 210g in it. I have had 3 of the 210g and it seems that any of the newer are producing more power.