just been out driving and testing props ( x438,x437 and x640) on my H&M drifter S. 8XL and hydra 240. 2X8,4 4500mah in serie (the OSE ones).

when running the boat with graupner k series 40mm the batteries would be around 105f. after a 4-5 minute run.
now that i tested the mettal props the batteries are 140f after 3 minutes. do even the small x438 and x637 pull that much more amp then a k series 40mm ?

charged all 6 batteries now and they all drained about 2000-2500 mah.
would the air temp cause this ? ( 93f in the air 77 in the pond)