ORIGINAL: saleens7

i have a NQD high wind and recently purchased a 3600mah nimh battery for it. The hobby shop I bought it from said the battery wouldnt make the engine run faster, just longer. when i took it out I was pleased to see atleast a 5mph increase. after about 2 minutes I took it in to get some weeds out of the prop, and noticed smoke coming out of the hull. I opened it and smoke was coming out of the engines and the radio box. I need to find a way to cool the motors but the mounts restrict me from wrapping any type of cooling lines around it and I dont know what size cooling lines to use. I need some solutions to this problem that cost no higher than 25-$30.