Hi I have quite big octocopter with flat frame cinenestar type with 16" propellers and t-motor u7 420kv motors. It has 120 cm frame size. I would like to change the propellers in it to 18" to have…Continue
"There was a research paper floating around on the net that showed with a ~10% overlap, there was a ~5% increase in efficiency. Don't hold me to those numbers. It was something like that. Unfortunately I don't have the link anymore."
"Why not do some testing with the original prop in the original configuration versus the "up/down" configuration, everything else being the same? Not only will you have your answer, but come back here and let us know what the results were.…"
"The overlapping will cause no problems but I doubt it will increase efficiency .
You can change by software the motor direction if you have black MK Esc or last version MK Esc, if you have the red MK Esc it is not possible and you have to…"
"Thanks for answers. I did calculation in ecalc.ch and checked the documentation of the motors so I know that on such configuration on flat octo if I will change propellers from 16: to 18" I will get extra 1 minute of flight time. My problem are…"
"Going from 16" to 18" depends also if you are actually with 4S or 6S batteries .
Finally you will get a 10% more thrust if T-Motor chart correspond to reality but the propeller weights more so it will less than 10% and has more…"
"You shouldn't need any kind of mixer as long as the Mikrokopter FC can be configured for an octocopter. As long as the motors spin the right direction relative to the frame, what difference would it make if the motors where pointing up or down…"
Hi I have quite big octocopter with flat frame cinenestar type with 16" propellers and t-motor u7 420kv motors. It has 120 cm frame size. I would like to change the propellers in it to 18" to have longer flight time. I can use longer booms but the copter will be too big for my car so I am wondering about using the same booms but 4 motors up and 4 motors down like in the picture in attachment. Is that setting is as efficient like flat octo or I will lost same flight time like on coax setup ??…See More