Quad copter owner

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mentar

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Apr 21, 2012, 10:28:05 AM4/21/12
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Hey all,
I've been trying to ascertain the hack-ability and ownership of this
quad copter beastie (http://bit.ly/IuPvvh) on wiki/irc/shouting. It's
in a weird area with all the electronics stuff which doubles as
members area so I'm wanted to make sure I find the owner and ask.
I'm doing a similar project but a tricopter (info on my wiki page:
http://bit.ly/HYe6LM), I am not yet sure what motor/prop combo I need
to provide sufficient thrust so was wondering if I can borrow the
motors (and ESCs if possible) from the quad to test my design.
So if you own the copter or know who does please shoot me an email.
Many thanks
Mentar

mentar

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Apr 21, 2012, 10:42:50 AM4/21/12
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Oops, first link fail, correction: http://db.tt/fiTYlbbx

Toby Catlin

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Apr 21, 2012, 1:02:15 PM4/21/12
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I have a few model helicopter ESC's that might be useful to you. They were silly cheap so i bought a few as the shipping was more than the units. They are at work so i'll have to wait til monday to find the model numbers but i am pretty sure i have 4 spare, or maybe you only need 3.

t

Anish Mohammed

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Apr 21, 2012, 1:57:19 PM4/21/12
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Hi Mentar,
Out of curiosity what u planning ;)
Regards
"UAV addict" (Anish)

Anish Mohammed
Twitter: anishmohammed
http://uk.linkedin.com/in/anishmohammed

Peter "Sci" Turpin

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Apr 21, 2012, 1:47:15 PM4/21/12
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A bit off-topic, but has anyone done any work on a hybrid 'copter
design? Seems to me the copter is great for hovering, but not the most
efficient for moving long-distnace. Really need something that can go
from hovering to flight with a lifting surface (wing/body) to increase
range.
I keep thinking of the way gyrocopters used an unpowered rotor as a
lifting surface.

Also, I recently got the same model solder-station caught in the right
of the picture. Hope that was with the Farnell discount bundle!! Lot
cheaper than on their own.

Anish Mohammed

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Apr 21, 2012, 3:04:30 PM4/21/12
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Hi Peter,
I am aware of some wing designs with paparazzi , not aware of any copter design. Have so far tried quad, hexa, octo, fixed wing and rover, yet to try traditional heli or hybrid copter . Would be keen to know more about the hybrid copter thoughts...

Anish Mohammed
Twitter: anishmohammed
http://uk.linkedin.com/in/anishmohammed

Jonty Wareing

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Apr 21, 2012, 2:52:49 PM4/21/12
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On Sat, Apr 21, 2012 at 06:47:15PM +0100, Peter Sci Turpin wrote:
> A bit off-topic, but has anyone done any work on a hybrid 'copter
> design? Seems to me the copter is great for hovering, but not the
> most efficient for moving long-distnace. Really need something that
> can go from hovering to flight with a lifting surface (wing/body) to
> increase range.

Sounds like you're looking for tiltrotors:

http://en.wikipedia.org/wiki/Tiltrotor

--jonty

mentar

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Apr 21, 2012, 2:59:48 PM4/21/12
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Hey Anish,
I want to make a hybrid tri rotor aircraft where the thrusters rotate
WRT the central base hence allowing more efficient lateral propulsion
as well as more manuevarbility (e.g. full yaw motion) Basic concept
vid here: http://www.youtube.com/watch?v=cEGA0Ep0XLQ
The thruster control is by PID processing onboard, which has been
simulated in Nastran and I achieved pretty decent results. That's the
first stage.

Next, I want to experiment with ROS on it with the aim to have it
orbit around an object (e.g. a person) and take videos while at the
same time mapping the surrounding environment and avoiding collisions.
Somewhat similar to drone journalism that was talked about before I
guess but that's just one of the uses for a platform.

I am more than happy work on something like this together so if you
are up contributing let me know!

Mentar

On Apr 21, 6:57 pm, Anish Mohammed <anish.moham...@gmail.com> wrote:
> Hi Mentar,
> Out of curiosity what u planning ;)
> Regards
> "UAV addict" (Anish)
>
> Anish Mohammed
> Twitter: anishmohammedhttp://uk.linkedin.com/in/anishmohammed

mentar

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Apr 21, 2012, 3:16:24 PM4/21/12
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Not that off topic as that's what I'm trying to do really :)
But instead of a fixed wing design it's really is a tilt-rotor just of
an unorthodox shape, I chose 3 rotors because having 3 points of
thrust should provide enough redundancy if one fails that the others 2
can safely land the craft.
In nastran I needed about the 3rd of the power for coasting (lateral
propusion) with the custom thruster housing vs naked blade design.
These were quite simplistic tests though as I'm not an aeronautical
engineer, just a computer one, guess I'll learn as I build!

On Apr 21, 6:47 pm, "Peter \"Sci\" Turpin" <s...@sci-fi-fox.com>
wrote:

Peter "Sci" Turpin

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Apr 21, 2012, 3:30:28 PM4/21/12
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Did wonder if maybe if the arms could be rotated and used as wings if
made aerodynamic enough. With pitch controlled rotors and rotor position
feedback, could probably make a composite flight control system mixing
throttle difference and pitch-varying unpowered rotor drag? Feels like
it'd be a bit clumsey though.
Maybe could be improved by mirroring the props and using the wing-arm
shape to sheild one half from airflow, so each side didn't have
conflicting pitch?
I'm aware I'm probably not using entirely proper terms.

Peter "Sci" Turpin

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Apr 21, 2012, 3:34:38 PM4/21/12
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Looking at your video, looks like it's using a lifting-body design. Very
neat idea! Might have issues with air resistance in rapid hover-climb
though?
I suppose an ideal system would end up something like a flying snake though.

Anish Mohammed

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Apr 21, 2012, 4:46:06 PM4/21/12
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Hi Mentar,
Happy to collaborate , have to admit I'm guilty of being on two open source AHRS/ap dev list. So I believe there is a small risk I might be a bit traditionalist by ur standards. Btw I am a theorist, and not a starter finisher :)
Hope to talk to you offline.
Regards
Anish

Anish Mohammed
Twitter: anishmohammed
http://uk.linkedin.com/in/anishmohammed

mentar

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Apr 21, 2012, 4:45:05 PM4/21/12
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Those are the sort of variables I want to experiment with!
The idea is that the whole aircraft is modular so I can replace the
rotor mounts and try different shapes for the mount housing.
I love data so I'll be posting plenty of the results :)

On Apr 21, 8:30 pm, "Peter \"Sci\" Turpin" <s...@sci-fi-fox.com>

Yuan Gao

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Apr 21, 2012, 8:07:07 PM4/21/12
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If  you're interested, we have this VTOL just sitting around, complete with electronics (same electronics that we use on our production quadcopters, so it's got GPS and everything as well): http://youtu.be/T2lUJk-fziE

Would you be interested in working on it?  It's basically ready to fly, and but we haven't coded in any vertical-to-horizontal transition yet, nor have we tried horizontal flight (might need a full new set of tunings.

Peter "Sci" Turpin

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Apr 22, 2012, 7:38:42 AM4/22/12
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Oh hell that looks like fun! I've already got too many projects on the
go though, sadly.
Using the tail as a landing leg is a really nice touch btw!
Multi-purpose ftw.

Tim Hutt

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Apr 22, 2012, 7:47:03 AM4/22/12
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There's also a working quadrocopter-wing thing (quadroplane?) on kickstarter but I forget the name.

mentar

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Apr 22, 2012, 8:14:56 AM4/22/12
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I spoke to Yuan offline and I may be able to help them with it.
Weather I am going for my tri-rotor design or this single wing
approach I plan to document and opensource the control for it so
you'll see the results

On Apr 22, 12:38 pm, "Peter \"Sci\" Turpin" <s...@sci-fi-fox.com>
wrote:

Toby Catlin

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Apr 23, 2012, 1:03:04 PM4/23/12
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I have just checked and i thought I had 12 of these but i only have 4, god knows what happened to the rest. I want to keep the remaining 4 for a another project. 

Sorry about that. Looks like you have lots of other toys to play with.
t

mentar

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Apr 23, 2012, 1:18:58 PM4/23/12
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No probs Toby,
Yuan from Universal Air might be able to loan me their platform to
code with, after working with that I should have a clearer idea of
what I need and will probably have enough to buy the specific
components I need.
Thanks for offering though :)

On Apr 23, 6:03 pm, Toby Catlin <t...@korfball.com> wrote:
> I have just checked and i thought I had 12 of these but i only have 4, god
> knows what happened to the rest. I want to keep the remaining 4 for a
> another project.
>
> Sorry about that. Looks like you have lots of other toys to play with.
> t
>

Yuan Gao

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Apr 23, 2012, 5:17:09 PM4/23/12
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Hey, just an update: the tiltrotor has been somewhat disassembled to harvest its parts, but we'll soon get most of the pieces back in.

Unfortunately we're running low on stock of Hivebrain boards, which means you won't get telemetry or USB joystick/gamepad control, did you have some kind of wireless control system that you wanted to use instead?  If not, I'll have a dig around for one, or you'll have to wait until the new stock comes in.

Yuan



On Monday, April 23, 2012 6:18:58 PM UTC+1, mentar wrote:
No probs Toby,
Yuan from Universal Air might be able to loan me their platform to
code with, after working with that I should have a clearer idea of
what I need and will probably have enough to buy the specific
components I need.
Thanks for offering though :)
wn.

mentar

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Apr 23, 2012, 8:34:28 PM4/23/12
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The first step is to get it to stabilise and I plan to do that on a
tether for simplicity so I can start without that. I've not considered
what I'm going to use for comms yet as that comes later so I can get
started without it

Mentar

Yuan Gao

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Apr 24, 2012, 11:58:08 AM4/24/12
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You can run the craft via the board plugged into USB, you can do comms that way, we have a simple program that communicates with the board over USB HID and sends tuning values.  We stopped using that since we had wireless comms, but we can reinstate it for you.

You need to be careful with tethers, when we were first stabilising it, the tether affects the centre of gravity, and it changes the dynamics of the vehicle.
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