TriCopter - QuadCopter - Project

Tanks a lot Zodius

Héhé… i have see that one on RCgroups. Look awesome but would not fly myself with it… lol
Don want to fly wit all those motor near me…

I have build the MiniY6 this weekend

http://farm7.static.flickr.com/6039/6295421459_7b76d821f7.jpg

Hey, Eric,
Any video yet of you Mini Y-6? That looks seriously powerful. I would be interested in payload capacity.

I have build that one for a friend…
I have build and give it to him… so no i don’t have a video yet… :frowning:

but probably soon

Awesome work Eric!
I’ve promised myself to build a copter one day. Not sure how many propellers though. Quad is probably the easiest way?

Yes Quad is the easiest.
You can do a “Tri” but you need some pivot on one of the motor to be able to “Yaw” in directions.

If you can make a simple servo mechanism (i am sure you can) for the “Yaw” then a “Tri” should be simple too… and only 3 motors and ESC.

I have not fly a tri yet. People say that they fly awesome… More than a Quad.

Quad is simple… a simple wood “X” should do the trick… :wink:

Eric

Does this imply that the rotor with the pivot will be offset in normal flight to compensate for the fact that there is an uneven number of props? Two props rotating in one direction with only one prop rotating the opposite direction will cause the craft to yaw. So even with the non symmetrical nature they still fly well?

“On the phone”

Yes when hovering the tail motor “yaw” will be inclined to compensate.

Why does the Tri-Copter need a servo to yaw one of the motors? Wouldn’t it work to just proportion between two motors? (I’m no expert, nor particularly versed in 'copters.)

I’d like to build a TriCopter. However a 'quad would have some backup if a motor or motor driver failed.

Alan KM6VV

In fact even with a Quad you can’t loose a motor and fly… :frowning:
You need an Octo or a Y6 setup to be able to do that.

here is some info about Tricopter
rcexplorer.se/projects/tricopter/tricopter.html

That one is build with simple HARD gyro. No flight controller.
But i do recomment one… LOL

OK I get it, because you’re using standard Heli CCPM swashplate controls.

Thanks for the link. TEMPTING! If I get a new futaba 7C, I’m tempted to try a Tri-Copter.

I’d have to make a few CNC parts, 'tho…

Probably more fun with a flight controller?

How’s your CNC coming along?

Alan KM6VV

As Eric mentioned it requires 6 or 8 motors. I recently read about the redundancy of these little guys. There are different levels of redundancy. You can have a single control system that controls all the motors, or you can have complete redundant control systems. The cool part is if you have self leveling and a motor gives out, the system should automatically ramp up the other motor to compensate. Of course performance will be reduced, but you can still land. :smiley:

that’s kinda what I was thinking. With four motors, you should be able to compensate. A little hard with only three motors!

Tricopter link only shows three motors. I suppose one could have three pulling and three pushing (up).

Reminds me of a comment made about an old cold war bomber (B-36) had 10 engines ("six turnin’ and four burnin’ ").

LM needs a Heli Kit!

Alan KM6VV

Flying (hoovering) robots, who doesn’t want that??? :stuck_out_tongue:

Put that aside for a while…
Will soon take time to setup it… i am at the point to power everything and make setup…

When using helicopter Gyro you need CCPM mix.
But not with a flight controller… !

I will have my own controller… it’s in the mail…!

http://farm7.static.flickr.com/6213/6331008297_af7ec9aa75_b.jpg

And in fact… will be able to upload the BotBoarduino with Multiwii sketch…!

No even 4 motor copters can’t be made redundant. The way it works is two motors rotate CW and two rotate CCW. This way they cancel each other and there is no yaw. To do yaw you speed up two and slow down two and the copter will turn. If one of them dies the copter will spin out of control. With 6 or 8 motors there is one on top of the other rotating the same direction. In this case there is much less an issue with the rotational imbalance and still plenty of lift to land safely.

It’s no secret I have been bitten by the multi-rotor copter bug. I have been collecting parts for several builds. My new workshop is starting construction next Monday. This will give me a place to work on these new ideas. And as Eric pointed out I intend to use the Botboarduino for the controller. I intend to have several kits soon. A little diversification never hurt anyone. :slight_smile:

i know that feeling! :frowning:
BEFORE:
http://i531.photobucket.com/albums/dd355/innerbreed/20081011_135053.jpg
http://i531.photobucket.com/albums/dd355/innerbreed/20080901_162210.jpg
AFTER:

You know there’s no such thing as an RC copter pilot, just RC copter repair persons that fly in between repairs! lol

In fact… since i fly multicopter… i ain’t broke anything … and i have crash many time