don't get me wrong here fellows but the moki 2.10 is not that much stronger than the 1.80 we had 2 of the same airplanes one with a 1.80 and one with a 2.10 the 2.10 did not pull out of a hover any better than the 1.80 . you have to think about that extra 5 oz. you have to get moving with the 2.10. we had a 22 x6 prop on the 2.10 and a 20x6 on the 1.80. the best prop on both engines we changed alot of props on both. what the manafacture advertiseses and what it actually is , is another story. we also had a 21x10 mejelick prop on the 2.10 it swang that prop at 7800 , so i deceided to put it on the 1.80 it swang it at 7500 rpm. i did not see the difference in the 2 engines both were almost equal other than the 2.10 wieghting more. just my opions i love the moki engines
Chad