hey guys i took my trainner up again , the OS .40 LA fired up no problem , everything was a go for takeoff and there was no wind and about %85 humidity, so i fly it for 15 min , doing loops rolls andall of the regular things i do , my plane is sound but my .40 LA seems to lack power, almost like it was running rich , but it wasnt , dose any1 here know why my engine acted this way today? it was no biggie but its still a concern because i dont want to crash my plane do to a engine problem (if it even is one) , so did it run a little slower cuz of the humidity , or are they always underpowerd or what? it idles fine and all it just seems to lack alot, this is my 6th sucsessful flight, (without any help of a advanced pilot) i love this hobby and all , i just want to make sure this is normal and if its not what can i do to fix the problem.

Don