Hey guys,

Thought I'd share the latest Pixhawk build. This little guy is a work in progress but so far the results are great. It's surprisingly stable and the battery lasts about 6minutes will full gear.

Even with the enclosed prop frame, FPV gear, Pixhawk + GPS + Telemetry, 2600mah 3S battery, Tmotors, and 12a OPTO this only weights 790grams. I'll share more details, video and the build photos if anyone is interested.

Happy droning, Tedro

Views: 5396

Comment by Gary McCray on May 8, 2015 at 3:05pm

Very cool Tedro,

Smaller is definitely better and the prop guards are very nice.

Did you make the frame?

Best Regards,

Gary

Comment by John Dennings on May 8, 2015 at 3:13pm

Very nice! Love the props enclosing frame. Custom CNC'ed?

Comment by Mark on May 8, 2015 at 3:31pm

Looks like the Danaus frame from QAV .

Comment by Felixrising on May 8, 2015 at 4:24pm

What kind of flight times are you getting with that set up? What is your amp draw?

Comment by Gary McCray on May 8, 2015 at 4:28pm

Thank you Mark,

Looks like the Danaus frame is actually made by Lumenier:

http://www.getfpv.com/danaus-fpv-quadcopter.html

It's biggest deficit is that it only accepts 5" props which explains the short flight time although I am sure turbulence on the lower ring affects it too.

Still, the protection provided is excellent.

Comment by John Dennings on May 8, 2015 at 4:58pm

Gary: You can use 6x4.5 props and cut them to 5" if need be for extra lift or flight time (depends on motors, etc .. of course). Sounds like a crime but it actually works very well. Using a jig for clean cuts is recommended.

Comment by Felixrising on May 8, 2015 at 5:16pm

That frame is available from a few resellers, glb has a glass and carbon version for sale. http://www.goodluckbuy.com/h250-q4-mini-quadcopter-qav280-carbon-fi...

Comment by Mark on May 8, 2015 at 6:56pm

SOMA et al did a great job on the cutdown experimentation.  HQP now makes them, the 'bullnose' are very popular, HQP5045 with mini fpv racers.  There is also now a HQP6045 three blade, which I would be keen to see how they perform when cut down as John has suggested. 

Comment by earthpatrol on May 8, 2015 at 11:49pm

You can make it even lighter by decoupling the top and bottom layer. Checkout the HooperFly Si04 for a design reference: http://www.hooperfly.com/products.html#sio4

Comment by Tedro on May 9, 2015 at 7:09am

Yes, this is the Danaus frame from Lumenier. It's more than I would typically spend on a frame but the guys at GETFPV have always been helpful so this is my show of support.

I like the idea of cutting down a 6x4.5x3 prop. I'll try that next. Right now it's on 5x3x3 which is ok but it could use some more lifting power. I'll try 5x4.5x3 as well to see how all compare in the field.

As for further weight reductions, I'm going to swap out the Immersion 600W TX (18g) for a Lumenier 600W TX (9g). I'm also considering the 12a KISS ESCs which should drop it another 24 grams. I'll probably go to a Zippy 1.8mah, shedding another 32 grams.

I like those other frames linked above but the goal was to use Pixhawk. This frame works well with room to spare. You can see I still have room for a Mobius or GoPro and a MinimOSD or Sonar. Battery weight is the weakest link right now.

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