tmojosh

Depending on how large you want this model will greatly change the equipment needed. I would say for vtol you need to keep the gross model weight well below 5 pounds , your goal probably 3 pounds but thats hard. Yes on ebay you can find contra-rotating dual blade 9 x 5 that actually has two motors one turns each blade. However they are not in clean air so they only produce 1-2 pounds thrust depending on rpm. However if you get two axi motors like 2814 and set them up to counter rotate just by pointing the second axi motor down in line with the first with a matching pusher prop. Also I recomend running the largest prop available width with low pitch , no more than 5 -6 in pitch. Ideal would be 4 in , and there are adjustable pitch units you can get 11inch and 13 inch in three blade so you can play with pitch. For vtol you need 1.1 to 1 thrust ratio , shoot for 1.5 to 1 because the little things like rx , rx batt , prop weight , wiring and mounts often add up to nearly another pound added to your flight wieght. Its 8 ounches for a 2200 mah battery , you will need two , one running each esc motor controller , I would recomend swift 50 amp brushless controllers they are only $25 bucks each. With two of these you could have 7 pounds or better of thrust with axi brushless motors. Taking into account 3.5 oz motor , 1 oz esc, 8 oz lipo battery = 12.5 oz per motor x 2 = 25oz thats 1.5 pounds for motor, esc and batteries that can produce 7 pounds static thrust. , that leaves 3 pounds + for radio rx , servos and framing