Headbang
Master member
For 3d you want a larger diameter, smaller pitch prop. 3d is all about static thrust. A fast plane is all about pitch speed.
For the same motor with different windings allowing for different kv. A higher kv works with less cells on the battery to make the same rpm. Sort of like high gear. Lower kv would mean more torque, allowing for a larger prop at the same amp draw.
Larger props cause more airflow at slow speeds over the control surfaces, this is what you want for 3d.
For 3d I measure to figure out the largest prop I can get on it and still have landing clearance. I take my all up flying wieght in lb and multiply that by 300 to get my target watts. Then I pick a motor with that wattage and a kv that allows the prop I want. That is over simplfling it, but gives a good base line. For a good example of charts look at subsonicplanes.com and the motrofly motors. Same motors with different kv and wattage and recommended cells, might help put it into perspective. Or I just confused it all to heck lol
For the same motor with different windings allowing for different kv. A higher kv works with less cells on the battery to make the same rpm. Sort of like high gear. Lower kv would mean more torque, allowing for a larger prop at the same amp draw.
Larger props cause more airflow at slow speeds over the control surfaces, this is what you want for 3d.
For 3d I measure to figure out the largest prop I can get on it and still have landing clearance. I take my all up flying wieght in lb and multiply that by 300 to get my target watts. Then I pick a motor with that wattage and a kv that allows the prop I want. That is over simplfling it, but gives a good base line. For a good example of charts look at subsonicplanes.com and the motrofly motors. Same motors with different kv and wattage and recommended cells, might help put it into perspective. Or I just confused it all to heck lol