The syncing of the motors is done by the controller, APM2 in the quadrotor mode. To my knowledge there is no tach feedback with the ESC so part of the process for level hovering is getting the register settings in the software set to accomplish that.
The APM2 interprets the stick commands into helicopter analogs and adjusts the rpm of each motor to respond to the flight commands. With fixed pitch props, this is the only way to get the force moments needed to make the craft move in the directions needed.
I lifted the dimension for the parts form the 3DR website - CLICK HERE
The 2nd page says the width is about 25.45 inches tip to tip. I actually haven't measured mine to check.
Orientation? Good question. I painted a red triangle on the corner for a "+" configuration. I will be flying "x" initially as the word on the street says that is best for newbies.
Most likely I will get foam balls painted day-glow and use them for 'front' orientation.
Right now I am raising funds (selling stuff on ebay) to buy the APM2 and the Spektrum AR6210 receiver. Got my DX6i (DSMX version) last week. Until the reciever and APM2 are in hand, I am working on the foam based Nova by Trent of MyGeekShow.
I am getting helicopter/quad stick time with the sim software FMS. Just got my DX6i working with that and it is sweet to sim with the transmitter I will be flying with.
Hi, I have just posted two photos, unfortunately I have no other. So this project is dead, I turn it to tricopter after the crash. Next time I will use foam I think :D Maybe I will launch another plane project after tricopter, I need to make it fly first so I didn't work on it since several week (I broke it 4 time and almost hurt myself seriously last time). I think my software suffer from problem with float precision. I can't wait to see your progress, I hope you will be able to post new photo ASAP. I no sure to understand, your ducted fan will be electric or glow powered ? I have absolutely no experience with glow engine (I have never seen one in my life lol) so I'm curious to know how long you will be able to fly. Have a good day !
Guess what, I have decided to work on my tricopter after our discussion. I just plugged the arduino, then plug the battery, then one motor fry !! I have never seen anything like that. Throttle at 0, the motor fry instantaneously, I think the god of tricopter hate me :( lol
Thanks Carl, it's great for long distance flights but not so good in slightly smaller spaces which is where I normally fly. That EPP wing, while big, is heavy. I think I'm at 1.8kg whereas it's predecessor was around 1.2kg. Toying with an idea for a very light MKIII at the moment for slower FPV flight. Regards from South Africa. Graham