90mm fan specs
Haoye 90mm fan with lip added
9 cell 4000mah pack120a hvescplatinum proor k force(same esc) ""$115"swang hobbiesor hobbyking.com
Hobbyking black 500h 1600kv heli outrunner$22
31.58 volts
124.88 amps
3992.4 watts
4.9 kilo"s or 10.8 pounds thrust..................motor+ fan $42...306grams ....fan needs balance before you try this...........