Replies to This Discussion

Permalink Reply by Sebastian Gralla on March 16, 2011 at 10:11am

ah sorry, thought you were talking about a quad and hashcopter is just a name of a fancy control board

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Permalink Reply by Ground Loop on March 16, 2011 at 9:41am

Aside from spacing, I still haven't found any pro/con comparison of the Hashcopter "paired motors" Quadcopter control, vs the more traditional Octocopter (eight motor control).  I'm still looking for the catch, since it seems Hashcopter is simpler and more fault tolerant.

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Permalink Reply by Markus Jahn on March 16, 2011 at 11:58am

It seems you are taking this design step further than I did.

I have flown a MK octo with i2c escs and my hashcopter with quad code + pwm escs, I must say hashcopter is still not as sophisticated as a "real" octo. In some situations(descending, taking off) Arducopter still has some improvements to make. However differences are very small and Ardu is improving.

Some of the difference might come from the fact that my motors are acting as pairs instead of being controlled individually. I have some slight yaw unstability with hashcopter but this is so mild i cannot say if it is due to the design.

Of the frame design I think biggest issue is not making it too big. This because when motors get too far apart their ability to yaw the copter weakens. But at least with my 80cm frame this is not a problem. It yaws quite fast.

How about a look of MK frames: LINK. Those are so far the best flying octos to be found. Those seem to be designed as small as possible with only about 10mm between props.

How would it work if you make propellers in different level and make them slightly overlapping each other? This way you could make the frame even smaller.

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Permalink Reply by Sebastian Gralla on March 17, 2011 at 8:05am

"How would it work if you make propellers in different level and make them slightly overlapping each other? This way you could make the frame even smaller."

 

trust me, don't do this. the tips of ech propeller move in and out of another "propeller zone" which will cause heavy vibrations and therefor an unstable flight behaviour

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Permalink Reply by Michel Dias Arouca de Souza on October 13, 2012 at 11:22am

I need a diagram on autocad dwg to cut the machine plasma, need a scheme octocopter.se Would anyone can help me thank.

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