It’s not easy to fly FPV during winter weather. You either have to have weather proof quadcopter (airplane) or fly indoors. And it’s not simple to find a good, big and cheap place to fly FPV in. But, how about flying FPV in a living room?
3 weeks after my first post on Project Dualcopter, it's time for small update. The plan was to install servos and control surfaces. Instead, I've done:
- Basic electrical wiring for motors and ESCs. They have power now and are ready to be connected to flight controller
- To level shelf (above propellers) designed to hold flight controller and radio receiver
- Think for a moment about landing gear. Yeap, there will be some sort of shock absorbers
- Think for a moment where battery will be placed: as low as possible to keep center of gravity below center of thrust
- Decide which propeller should run clockwise and which should run counterclockwise: top should go clockwise, bottom should go counterclockwise
I have no idea how I was able to build drones before I've bought my 3D printer… I before I've learned basics of 3D design. So, today I present you upgraded version of my Runcam HD / Mobius camera mount I've designed few months ago.
- tilt angle increased from 25 to 35 degrees
- allows to use wider zip tie for mounting
STL file can be downloaded from Thingieverse
Flying season 2016 is slowly coming to an end on northern hemisphere. That means less time spent on an airfield and more time spent behind a desk. For this autumn I've found a very interesting, small project: Dualcopter.
Dualcopter is an UAV with two coaxial contra-rotating propellers and 2 control surfaces driven by servos. Lift and yaw are controlled by propellers, while pitch and roll by ailerons placed below motors. This video illustrates how it looks like:
My Dualcopter will be slightly different. Instead of foam and wood I will use 3D printed parts connected together CA glue and zip ties. Maybe it will not be super strong and probably will not survive any crash, but should be enough to make it fly for a minute or so. Almost all parts would be either 3D printed or taken from spare box. I'm not planning any new purchases.
- Motors: Turnigy MT2213 935KV
- Props: APC 1045 MR
- ESC: Afro 20A
- FC: Flip32 probably with INAV inside
- Battery: 1300mAh 3S
- Weight: around 800g with battery
So far, after 2 evenings I have this:
Two motors mounted on a frame.
Next step would be to build bottom section with ailerons and battery compartment.
Few days ago I've decided to do something new: timelapse video of a 3D print. It's kind of fascinating to watch extruder places layer after layer of molten PLA… too bad it's taking so long to print something bigger…
- Printer: Malyan M150
- Thing: 35 deg RunCam HD / Mobius stand for mini-quads
- Filament: PLA
- Speed: 50mm/s
3D Printers give almost endless possibilities and 3D printed gliders can be a great weekend project. Last week I’ve printed a small fleet of Monarch XL gliders from Thingieverse. Single glider takes around 45 minutes to print at 50mm/s and few additional minutes to glue all the parts together. Add an hour for a rubber launcher and done. Great fun for a small price. It flies surprisingly well and my daughters loves them.
Flight characteristics improves when dihedral is added. Also elevator can be adjusted, so glider can do loops! Great fun for a very low price!
After I finished my new Reptile X4R 220 racing mini-quad, I've realized, that there is no way I will be able to mount my RunCam HD on it. Comparing to ZMR250, 220 frame is just small. On a top plate there is enough room to fit battery, RC and FPV antennas and all what is left is around 35mm in the front. Plus, with angled FPV camera, there just no place for RunCam HD/Mobius form factor cameras. So, some time with 123D Design and few hours of printing, and here we are: 25 degrees mount for RunCam HD and Mobius camera specially designed for Reptile X4R 220 frame
This mount has 25 degrees inclination, will fit both RunCam HD and Mobius (not sure about RunCam HD2…) and its base is only 42x32mm. So it can be installed on small frames like 220. But, it will also fit bigger. No problems here.
The best way to install it on a frame is to use either zip ties or double sided velcro straps. There is a slot for 20mm wide velcro straps. To make it better, use 3M Dual Lock between.
To securely install camera also use 3M Dual Lock and use a velcro strap too. That should keep everything in place just fine.
When I got my first 3D Printer (Malyan M150) and got into 3D printing I was surprised how consumer not-ready technology this is. Sticking, not sticking, overextrusion, underextrusion, Kepton, blue painters tape, clogged extruder… Over the time, at least, I was able to get the whole 3D Printing process somehow repeatable. I think one of the most important changes I’ve made in my 3D Printing experience is to ditch Kepton and blue painters tape in favor of printing PLA on heated glass. Process got simpler, faster and with better results. Also, not counting initial investment, cheaper.
Almost all “racing” MultiWii derivatives flight controllers like Naze32, SPRacingF3, CC3D or Sparky, besides the same CPU family (STM32) and ability to run Cleanflight, share the same form factor: 36x36mm size and 30.5mm hole spacing.
That creates a small problem when mounting them to some bigger frames designed to fit APM, Pixhawk or MultiWii. They do not fit and require additional adapters.
Facing problem like this, I’ve designed simple 3D Printed 30.5mm to 45mm flight controller adapter.
To use, 4 hexagonal nylon M3 standoffs have to be glued into place. M3 thread is rather too small to print on most 3D printers. It’s just faster and simpler to glue standoffs than try to print threaded holes. I used epoxy glue, but hot glue also can be used if needed.
Beitian BN-880 (I’ve bought mine from Banggood) is an excellent, cheap and accurate Ublox NEO-M8N GPS module. I’m using it for last few months and I’m very happy with it. But is has one serious flaw: there are no cases/enclosures for it. So, in most applications it is naked. I’ve decided to fix that and designed 3D printed Beitian BN-880 case.
Case can be dowloaded from Thingverse