THE 2.10 WELL PULL 16 LBS OUT OF A HOVER AT SEA LEVEL . I HAVE 1.8 ON DP EXTRA BUT WELL NOT PULL OUT OF HOVER AT 5000 FT ELEVATION. USE A BAMBULA POWER PROP 2O * 8- 18 *8- 19 *8. I ALSO HAVE A PUMP. GOOD RUNING MOTER ONE DEAD STECK IN ONE YEAR . I USE 24 OZ TANK THAY ARE THIRSTY.