"Hi Ed;
Thanks for the info. BTW have you done aerobatics with the EDF rotor? I wonder if any of the controllers could help with the flip, or do we have to switch it off ?
Rgds
Fun Wey"
kyi's Discussions
ducted fan quadcopter
Started this discussion. Last reply by Fun Wey May 13. 11 Replies 0 Likes
i have built a quadcopter using ducted fan with 400g thrust each, my quadcopter only weight about 750g,but it doesnt even lift off at half throttle only at full throttle. anyone have any suggestions…Continue
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Ed Kirk replied to kyi's discussion ducted fan quadcopter"Hi Fun Wey,
All of the control boards have a diagram for prop rotation when looking down from the top, to achieve proper angle for the EDF's put an arrow on each boom showing the rotation for each motor then rotate the EDF in the same…"
Fun Wey replied to kyi's discussion ducted fan quadcopter"Hi Ed;
Since you are not using counter-rotating EDFs (i.e. all the props rotate in the same direction), are all the EDFs oriented at the same angle (relative to the vertical axis of the quadrotor)? I observed that the EDFs pairs on your…"
kyi replied to kyi's discussion ducted fan quadcopter"hey do you know whether number of blades on a ducted fans matters? for example two ducted fans of the same dimemsion and kv but one with 8 blades and other one with 6 blades, are there any differences? cus i orignally wanted to buy ducted fans with…"
kyi commented on Ed Kirk's blog post Ducted Fan Tricopter"does the size of the copter matter for this type of copter?"
kyi commented on Ed Kirk's blog post Ducted Fan Tricopter"what type of servo did you used? does the type of servo matters?"
Ed Kirk replied to kyi's discussion ducted fan quadcopter"Since torque isn't used to control yaw the EDF's must be installed at an angle so thrust controls yaw.
The instructions (control board) show proper prop rotation, rotate the EDF angle. If the prop rotates clockwise rotate the EDF…"
Ed Kirk replied to kyi's discussion ducted fan quadcopter"
You need at least 30 amp ESC's, I had to use 60 amp ESC's with 90mm EDF even though they don't draw that much current. I think my 60mm EDF has 40 or 45 amp ESC's."
kyi replied to kyi's discussion ducted fan quadcopter"i tried increasing from my 2cells to a 3cells but the ducted fan shut down on its own when i go more than half throttle. its so stubborn its like telling me only a 2cells will do."
kyi replied to kyi's discussion ducted fan quadcopter"i used this ducted fans http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=8834
esc-http://www.hobbyking.com/hobbyking/store/__2161__TURNIGY_Plush_12amp_2A_BEC_BESC.html
apm1 and a 2cell 2000mah
i calculated and they are…"
Ed Kirk replied to kyi's discussion ducted fan quadcopter"Ducted fan quadcopters do work, not knowing any details I can't provide advice. You probably need to increase the cell count on the batteries, mine acts like your description on 4 cells but flies very well on 6 cells. If the ESC's are not…"
"You will need to provide more data such as:
Ducted Fan brand/model # (diameter, motors, etc)
ESCs used
Control board (APM2.x, HK, etc)
Battery size
Power Distribution Board
A photo or two would help..
Regards.
-=Doug"
ModeratorSgt Ric replied to kyi's discussion ducted fan quadcopter
"Those thrust numbers are undoubtedly assuming horizontal mounting and higher speed, therefore greater efficiency.
I'm not any kind of an expert on this, but there have been many discussions here and at rcgroups about using ducted fans in…"
kyi posted a discussionducted fan quadcopter
i have built a quadcopter using ducted fan with 400g thrust each, my quadcopter only weight about 750g,but it doesnt even lift off at half throttle only at full throttle. anyone have any suggestions on wat wrong or how i can improved it? my battery is charged btw.See More
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