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Old Dec 05, 2012, 03:49 AM
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Hubsan X4 Hybrids

Out of sheer curiousity and boredom (and not being happy with a stab at the mqx/ladybird hybrid) i decided to try the hubsan board on a ladybird frame. And oh my goodness, what do you know she flies super stable and smooth much like her original form but yet with more authority and ability to be more agile. Punchout is much better and yaw rates have drastically improved(yes even faster than stock). If you have an opportunity to try it, PLEASE GO FOR IT! As much as i loooove the original x4, methinks i need to buy another rx board or kit in order to get my original sized hubsan back. Board is hot glued in place. Motor assemblies are actually from the udirc u816. Surprisingly super quiet, can only hear faint pwm frequencies. Will hopefully get a vid up soon.
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Last edited by specgie; Jan 16, 2013 at 03:25 AM.
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Old Dec 05, 2012, 05:41 AM
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Nice!
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Old Jan 16, 2013, 03:52 AM
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Just updating my post with my recent successful and fun experiments with the hubsan x4 board. As you can tell, I love the hubsan x4's flight characteristics

First up, just an updated look to my UDI(ladybird) x4 hybrid. Super stable smooth flyer.


Then, next up my second hubsan hybrid, same size as X4, and a cut-down modified and lightened version of the UDI frame. Super zippy flyer, even moreso than stock x4.




And my latest and hopefully my last conversion which i shall dub the x1x4. I acquired a cheap used syma x1 and while i enjoyed how it flew stock, of course I HAD to throw the x4 board on there. I trimmed 1.5cm off each boom to shrink the footprint a little and to help make better use of the x4's accelerometers. Hoping to add FPV to this rig in the future. Definately still a super smooth flyer but unlike it's stock counterpart reacts much better to input and self-stabilizing in this size is a plus(FPV/wind).



Now, I'm anticipating a nice night at the local park for an awesome flying session!!
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Old Jan 16, 2013, 06:35 AM
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That's very cool! I also love the Hubsan x4 flight characteristics and how well the accelerometer works. I'm using mine with Devo 8s with deviation firmware and it flys amazing!

I tried one of the Hubsan X4 boards in a Blade MQX but unfortunately did not work out and was not stable at all. Maybe I did something wrong but I just assumed that it was because the MQX was not direct drive and that the booms were longer.

I'll probably try with a ladybird as well, just gotta find a good way to mount the board.

Do you know if the Syma x1 is the same size as MQX? How did it fly before you shortened the booms? Will be great to see some video of these flying
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Old Jan 16, 2013, 07:26 AM
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Hi, did use use resistors for those LEDs? Where/How do you hook them up?
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Old Jan 16, 2013, 12:40 PM
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Quote:
Originally Posted by RCaDDiCT! View Post
Do you know if the Syma x1 is the same size as MQX? How did it fly before you shortened the booms? Will be great to see some video of these flying
The syma x1 if i'm not mistaken is the same size as the MQX/v929 etc. Before I shortened the booms, with the hubsan board it would over-correct and cause a death wobble to heavy stick inputs. Now with the shorter booms and only using 85% travel on the aileron stick, flies much much smoother. And flips are still possible too. Hopefully I can get a vid up soon, although I enjoy night flying much better- we'll see if i can get a nice video showing each hybrid's characteristics.
BTW, how hard was it to get your Devo 8s to interact with your hubsan??

Quote:
Originally Posted by ogrope1 View Post
Hi, did use use resistors for those LEDs? Where/How do you hook them up?
Yes, the leds that operate at 3V are coupled with a 470ohm 1/8 watt resistor soldered straight to the battery point on the board.
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Old Jan 16, 2013, 01:11 PM
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Which one of these flies the best? Has the best flight time?
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Old Jan 16, 2013, 01:35 PM
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Originally Posted by variantman View Post
Which one of these flies the best? Has the best flight time?
flight times are variant upon flight manuevers but obviously the little guy gets the most flight times. -Around 8-10 minutes depending how aggressive the flight. But the one I enjoy the most and has the most balance between stability and agility is the ladybird-sized hybrid. Plus it's the one i've had the most stick time with.
I will get AUW of each quad posted soon along with flight times, and vids.
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Old Jan 16, 2013, 02:38 PM
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Thanks for the reply, is this what you used http://www.ebay.com/itm/1-8W-Watt-47...item3377dfea8d ?
OK so if I understand correctly you solder the resistor directly on board and then just solder the wires hooked up to the LEDs?
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Old Jan 16, 2013, 02:47 PM
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Originally Posted by ogrope1 View Post
Thanks for the reply, is this what you used http://www.ebay.com/itm/1-8W-Watt-47...item3377dfea8d ?
OK so if I understand correctly you solder the resistor directly on board and then just solder the wires hooked up to the LEDs?
Yeap, but just to be sure you use the right resisitor and get the proper brightness out of whatever leds you choose to use, use this calculator with the led's specs to get the correct resisitor :http://ledcalculator.net/
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Old Jan 16, 2013, 03:38 PM
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Quote:
Originally Posted by specgie View Post
The syma x1 if i'm not mistaken is the same size as the MQX/v929 etc. Before I shortened the booms, with the hubsan board it would over-correct and cause a death wobble to heavy stick inputs. Now with the shorter booms and only using 85% travel on the aileron stick, flies much much smoother. And flips are still possible too. Hopefully I can get a vid up soon, although I enjoy night flying much better- we'll see if i can get a nice video showing each hybrid's characteristics.
BTW, how hard was it to get your Devo 8s to interact with your hubsan??


Yes, the leds that operate at 3V are coupled with a 470ohm 1/8 watt resistor soldered straight to the battery point on the board.
My MQX would also go into a death wobble so I guess shortening the booms is the answer. Doesn't seem like they can be shortened by much before the props touch.

Just found out the Syma x1 uses 7mm motor which is same as Hubsan X4 motors, but MQX uses 8.5mm motors I guess this could also make a big difference. Perhaps the FETs are not good enough for the bigger motors.

It's really easy to flash deviation onto Devo 8. You do need to also fit a A7105 module inside transmitter as well but this is quite easy if you follow instructions here: http://www.deviationtx.com/repositor...y-to-Devo.pdf/
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Old Jan 18, 2013, 01:33 AM
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Those look great specgie! I can't decide which one I like the best.

-Pat
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Old Jan 30, 2013, 12:59 PM
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Great hybrid work here Specgie. Very creative on the upside down motor and frame too.

@R,
Yes the X4 FETs are slightly less powerful as those on the MQX/V939 sized mini quad fcbs, so that is likely at least part of the wobble problem you had. A mechanical PID adjust by using smaller props(or trimming and balancing the originals) and shortening the arms a few cm might be the trick that works on an MQX/V929 motor frame X4 fcb hybrid build though.
Cheers,
Jim
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Quote:
Originally Posted by RCaDDiCT! View Post
My MQX would also go into a death wobble so I guess shortening the booms is the answer. Doesn't seem like they can be shortened by much before the props touch.

Just found out the Syma x1 uses 7mm motor which is same as Hubsan X4 motors, but MQX uses 8.5mm motors I guess this could also make a big difference. Perhaps the FETs are not good enough for the bigger motors.

It's really easy to flash deviation onto Devo 8. You do need to also fit a A7105 module inside transmitter as well but this is quite easy if you follow instructions here: http://www.deviationtx.com/repositor...y-to-Devo.pdf/
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Old Jan 31, 2013, 03:34 AM
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would be nice to see some video of the different versions flying specially the x1x4
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Old Feb 14, 2013, 08:42 AM
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specgie, any update about your x1x4?
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