Just completed the assembly and setup of my new 3DR X4. I am using all 3DR parts including:
- Pix Hawk
- GPS/Compass
- 915 Mhz Tele,
- 3DR Power Module
- 3DR 850 Kv 28/30 Motors
- 3DR Simon. K ESC
- APC 10 X 4.7 Props
- FrSky Tx &Rx
- GCS
- Nexus 7 running DroidPlanner 2.0
I have completed my first flight using the default X4 Param. It was stable but I wanted it to have a more locked in feeling so I performed the Auto-Tune and all I can say is "WOW", really nice. I have made a mount for a digital camera to be mounted to the bottom for Ortho-mapping small areas. I use a Canon Elf 115 with CHDK for USB remote triggering by the PixHawk. Works great....
The DIY frame kit is excellent. It even included locktite. Great quality and it goes together nicely.
Thanks 3DR for such a great product....
Joe Millette
Comments
After flying it today loiter is rock solid without completing the compass mot. so as the saying goes "if it ain't broken don't fix it." I might add the other four down the road but for now it seems good...
The biggest reason for inverted motors on a quad is vibration. If you have ever heard the load noise from a flying wing when the prop is spinning. that is the "thump" of the prop over the boom. This set up omits that and creates a smooth sounding copter. It also prevents vibration from entering the frame. Regarding efficiency i did not notice any change.
you going to add 4 more motors eventually, X8 is a great way to go. As for as the compass issue you are having, have not had any problems myself, hit up tech support, there are also videos on the 3DR youtube on compass call.
why do you say its less efficient? I test flew it today with no noticeable loss of flight time.
I was able to get a 20 min flight time with a 5000mah 4s.
It's roughly 10% less efficient now.
How's that for an explanation ;-)
Simon
so explain at length about the inverted motors?
hzl
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