XR-210
By QuadStar Drones on Aug 17, 2017
The Idea:
Not many pics since it still has to be refined... The main plan was to come up with a fun flyer that is strong, light, and with a low cross section. A Runcam Split was used to help with a couple of the objectives. You can't tell in the videos, but a nice by product of the design is that it's relatively quiet. Obviously with the motor choice (not much of a choice since I'm hooked on these) I wasn't super concerned with weight. Although the frame is only 31g, AUW is about 405g.
Changes:
Arms
The frame didn't survive the day. The arms didn't break, but 2 of them lost torsional strength - the type of carbon fiber for the 6mm arms is not the woven pattern; the fibers run along the axis of the tube which gives it a lot of bending strength, but doesn't give it much twisting strength (torsion). During the crash, a couple arms got twisted which weakened the torsional stiffness of the arm. Although they still had strength in a bending direction, they felt extremely rubbery when twisting them. I will probably up it to 8mm arms (pictured below) on the next revision.
Protection
The mentioned crash also injured the runcam by way of a pine branch straight to the circuit board :( I can see this happening on just about any build, but some simple side shields could've helped to avoid this.
It Was Fun While It Lasted:
Photos
Part List
Show stores (11)
Hi! I like your design and i'd like to make a similar one, with woven carbon tube, i'd love to see how you fixed the arms to the center plate!
Aerodynamics and weight are pretty good because it is really performing well. I hope you rebuild it soon.
I've always been sketchy with details since I am still refining it. I know how devastating it is putting all this work into a frame only to break it - I don't want to waste anybody's time! I did try the 8mm woven fiber tubes and I did crash and break it. It was a very hard crash (the battery flew 150 feet away) but I won't stop until it is bullet proof. After all, what is the logic in having a hot rod if you can't push it hard? I am getting there...
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HOw are the motors? What batteries do you use?
Sorry for the late reply - I love these motors: https://quadstardrones.com/2017/12/26/choosing-the-right-motor/
I've been using Infinity 4s 1300 90c. Joshua Bardwell did a lipo shootout and they performed pretty good, especially for the price.