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Old Jul 27, 2010, 06:05 AM
Speed Nut
Joined Jan 2010
479 Posts
Quote:
Originally Posted by warthox View Post
motor 2 motor 375mm so center to motor 187.5mm
Brilliant! That's why you have so much agility, and also when you stop from forward flight into hover, your copter is just amazing, it's like it's got one bigger propeller as opposed to 4 different small ones.
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Old Jul 27, 2010, 06:07 AM
Speed Nut
Joined Jan 2010
479 Posts
I was wondering if the gyroscope from the Wii motion + can be used in place of the murata gyroscopes. Would the software need to be changed as far as update rates go???
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Old Jul 27, 2010, 06:12 AM
That tree again!!!!
thanhTran's Avatar
Germantown, MD, US
Joined Sep 2004
6,642 Posts
Quote:
Originally Posted by warthox View Post
i like it small and i like the trex landing gear too. to carry heavy payloads it doesnt matter if the copter is big or small. only the power of the motors matters...
I beg to differ. The smaller frame makes the quad more sensitive to the gain control. And also the closer the props together, the more chance the air gets "dirty" / turbulence and the quad / hex become unstable.

Think of it this way, if the frame is small, and you get a big payload, it would look like a flying vertical tube. I don't see how it could be stable. Not to mention big payload will cover much of the air flow...

Quote:
Originally Posted by warthox View Post
only the power of the motors matters...
Go ahead put a big motor with a small prop (because small frame cannot use big prop) and see how it goes
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Old Jul 27, 2010, 06:20 AM
That tree again!!!!
thanhTran's Avatar
Germantown, MD, US
Joined Sep 2004
6,642 Posts
Because of the sample pics from Markus and great video of Kaptein & Jussi, I took the plunge and bought a GoPro HD . I put it on my tricopter and did a quick fly test last Sunday. Here is my first go pro HD video:
GoPro HD on Tricopter with KK controller - test 1 (3 min 35 sec)

The video is much better compared to video of a keychain camera on the same ship, but I still have some unwanted roll or pitch shake (small & quick oscillate) when the tricopter drops altitude fast. What should I do to improve the video more? (apart from trying to fly & turn slower ) I will do more testing with a little lower gain to see how it goes.

Thanks

-Thanh
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Old Jul 27, 2010, 06:21 AM
Jakub J's Avatar
Krakow/POLAND
Joined Dec 2009
1,731 Posts
Sexy legs ;)

First "design" of landing skids...



Too high, too narrow, not too complicated

J.
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Old Jul 27, 2010, 06:30 AM
Flying 3 mistakes high
GlennS's Avatar
Melbourne, Australia
Joined Jun 2004
1,522 Posts
Which assembler is used to assemble the KK source code?
Cheers,
Glenn.
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Old Jul 27, 2010, 06:30 AM
That tree again!!!!
thanhTran's Avatar
Germantown, MD, US
Joined Sep 2004
6,642 Posts
Jakub,
It's so beautiful! So now where is head and where is tail
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Old Jul 27, 2010, 06:30 AM
That tree again!!!!
thanhTran's Avatar
Germantown, MD, US
Joined Sep 2004
6,642 Posts
Quote:
Originally Posted by GlennS View Post
Which assembler is used to assemble the KK source code?
Cheers,
Glenn.
AVR Studio.
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Last edited by thanhTran; Jul 27, 2010 at 06:46 AM.
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Old Jul 27, 2010, 06:48 AM
a little boy's dream come true
bob.titus's Avatar
France, Corse, Santo-Pietro-di-Tenda
Joined May 2009
3,366 Posts
Quote:
Originally Posted by Jakub J View Post
First "design" of landing skids...



Too high, too narrow, not too complicated

J.
great, you just gave me an idea for my own

Bob
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Old Jul 27, 2010, 06:49 AM
a little boy's dream come true
bob.titus's Avatar
France, Corse, Santo-Pietro-di-Tenda
Joined May 2009
3,366 Posts
Here is what I'm getting :

M1 = front (cw, pcb arrow pointed there)
M2 = left (ccw)
M3= right (ccw)
M4 = back (cw)

- all motors calibrated
- no mix on radio
- CH1 = AIL, CH2 = ELE, CH3 = THR, CH4 = RUD
- GAIN : Yaw 100%, Roll and Pitch 50%
- no short on atmega168 pins

When moving sticks, motor response is as follows, it's very weird :
+ = increase
0 = no action
- = decrease


YAW
Right Left
M1 + M1 +
M2+ M2 +
M3+ M3 -
M4 - M4 +

ROLL
Right Left
M1 + M1 0
M2 + M2 0
M3 0 M3 0
M4 0 M4 +

PITCH
Back Front
M1 - M1 +
M2 - M2 +
M3 + M3 -
M4 0 M4 0

Any idea?
It seems like something is shorted, or firmware badly flashed or something, I used QuadControllerV4_4_M168_M328.

Bob
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Last edited by bob.titus; Jul 27, 2010 at 07:18 AM.
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Old Jul 27, 2010, 07:07 AM
Flying 3 mistakes high
GlennS's Avatar
Melbourne, Australia
Joined Jun 2004
1,522 Posts
Quote:
Originally Posted by thanhTran View Post
AVR Studio.
Thanks. Downloading it now.
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Old Jul 27, 2010, 08:09 AM
Registered User
Brisbane, Australia
Joined Mar 2010
152 Posts
Quote:
Originally Posted by thanhTran View Post
What should I do to improve the video more? (apart from trying to fly & turn slower ) I will do more testing with a little lower gain to see how it goes.

Thanks

-Thanh
looks pretty good already considering that you seem to be flying fast.
Have you tried stabilizing the video in Software? On a mac you can do it with iMovie and on a windows machine you can use VirtualDub with the Deshaker plugin (free).
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Old Jul 27, 2010, 08:32 AM
Registered User
Brisbane, Australia
Joined Mar 2010
152 Posts
some video from the first flights with my quad on the weekend

http://www.youtube.com/watch?v=cPCrHDW03lY

Currently the quad is grounded while I'm waiting for a new lipo charger to be shipped from HK.
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Old Jul 27, 2010, 09:19 AM
Registered User
Fulg's Avatar
Montreal, Canada
Joined Sep 2008
57 Posts
Quote:
Originally Posted by OpticalFlow View Post
some video from the first flights with my quad on the weekend [...]
I see you're continuing the trend of using animals as test pilots... I'll have to remember that before recording my first flights.
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Old Jul 27, 2010, 09:23 AM
RTFM // copter damaged
warthox's Avatar
Joined Aug 2009
1,726 Posts
Quote:
Originally Posted by thanhTran View Post
I beg to differ. The smaller frame makes the quad more sensitive to the gain control. And also the closer the props together, the more chance the air gets "dirty" / turbulence and the quad / hex become unstable.

Think of it this way, if the frame is small, and you get a big payload, it would look like a flying vertical tube. I don't see how it could be stable. Not to mention big payload will cover much of the air flow...


Go ahead put a big motor with a small prop (because small frame cannot use big prop) and see how it goes
your right. my answer was only for the weight of a payload. only because u want to lift a heavy payload u dont need a big frame.

but for a smooth flight a bigger frame is better, like u said.
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