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Old Dec 20, 2009, 04:07 AM
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Question
Possible to fly Quadcopter without special board ?

Is it possible to have a (reasonably) stable quadcopter, using only 3 gyros and a 90 degrees swashplate mixing on the radio (plus additional mixings) ? Meaning, without a custom control board ?
That's what they do with tricopter, but I tend to prefer the quadcopter design, that simplifies things by adding a fourth motor and reverse props (no need for tilt mechanism on the 3rd motor). Also, the frame is simpler with 2 arms at 90 degrees, rather than 3 arms at 120 degrees.
Marc
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Old Dec 20, 2009, 12:16 PM
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I don't think that is feasible, as the special mixing that is required (especially for yaw) is not within most TXs capabilities.

-Jamie
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Old Dec 20, 2009, 12:58 PM
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Quote:
Originally Posted by marckossa View Post
...........Also, the frame is simpler with 2 arms at 90 degrees, rather than 3 arms at 120 degrees.
Marc

you can still use 90degree frame with tricopter
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Old Dec 20, 2009, 01:28 PM
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You can do it with three gyros and three v-tail mixers.

Some guys did it some four years ago: http://www.rcgroups.com/forums/showt...er#post4874513




Sebastian.
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Old Dec 21, 2009, 04:32 AM
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Quote:
Originally Posted by fmkit View Post
you can still use 90degree frame with tricopter
Very nice ! I like this design.
Could you share some info on it (for example, which motors) ?
Thanks,
Marc
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Old Dec 21, 2009, 08:39 AM
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Quote:
Originally Posted by bas10an View Post
You can do it with three gyros and three v-tail mixers.

Some guys did it some four years ago: http://www.rcgroups.com/forums/showt...er#post4874513




Sebastian.
That looks like it may be better than the tricopter. I only requires 3 gyros and totally eliminates the need for a servo and mechanical devices required to tilt the back rotor.
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Old Dec 21, 2009, 09:44 AM
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Quote:
Originally Posted by fmkit View Post
you can still use 90degree frame with tricopter
Would it make sense to do something like this:
(horizontal motor is fixed, so there's no need to a servo).
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