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« on: August 26, 2012, 10:34:01 AM »
VC
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Successfully maidened my first Quad yesterday. Thanks to Sandy, Gusty, Subhash and VK - couldn't have done it without your help and guidance. The biggest inspiration is Ashta Sir who started the thought process. Bow

I have a very short video clip of the maiden, tethered flight which may not be worth uploading.

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The Ugly Quad!
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« Reply #1 on: August 26, 2012, 10:45:10 AM »
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Congrats VC!  Clap Couldn't find "ugly" anywhere, is it written under the frame  Huh?
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« Reply #2 on: August 26, 2012, 10:57:34 AM »
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Thanks Sam. Still in the process of tuning this 'idiot proof' board. I need to understand a lot more about P and I values. At the moment, she is rising straight up and the yaw has been dampened quite a bit. However, she has a tendency to drift. I also feel that my arms are not stiff enough and thus are vibrating.
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« Reply #3 on: August 26, 2012, 11:08:14 AM »
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Hope you have balanced all the props!
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« Reply #4 on: August 26, 2012, 11:13:31 AM »
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No. I think the issue here is far more serious in terms of construction error. The aluminium c angles are very lightweight. I should have used square pipes but couldn't find any.
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« Reply #5 on: August 26, 2012, 11:23:32 AM »
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I need to understand a lot more about P and I values.
This thread (first post) helped me a LOT. Might be useful to you too: http://www.rcgroups.com/forums/showthread.php?t=1375728

The aluminium c angles are very lightweight.
You can use dual-C angles instead. They are used as rails for sliding glass panes in showcases. These are available in many gauges at almost every furniture/ply store, and I felt these are better than square pipes.
http://i896.photobucket.com/albums/ac166/vineet_punyamurty/DSC06862.jpg
The Ugly Quad!


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« Reply #6 on: August 26, 2012, 11:25:07 AM »
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VC, if you haven't balanced the props.. please do. I had similar issues and it was the prop. Your case might differ but still properly balanced props are very important for quads.
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« Reply #7 on: August 26, 2012, 11:29:00 AM »
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Hello Sir...

Greetings....

I am through the process of making my quad and have no experience than u do in any sense but when I was doing some reading on RCI I got a few topics where people suggested to abandon the use of Hobbyking ESC's for Quads..... It is because they get jammed while operation... From which they mean its refresh rate is low which is an anomaly for our Quad due to its differential four point drive mechanism....

Hope it helps...

Thankyou...
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« Reply #8 on: August 26, 2012, 11:35:01 AM »
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@Adiboy:
It's NOT *hobbyking* ESCs, but hobbyking's SS series ESCs only! Hobbyking's F-30A ESCs (~$9) flashed with SimonK's f/w are just great, even better than $40+ ESCs.They have a refresh rate of >>> 400Hz. (~500Hz?)
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« Reply #9 on: August 26, 2012, 11:52:02 AM »
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Thanks everybody. I hope to add on to this thread soon with more positive results. Any queries are welcome.
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« Reply #10 on: August 26, 2012, 12:04:39 PM »
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About the SS, I too read about them but only after ordering them  Bang Head Every issue I faced, I sort of pointed my fingers at them  Wink But, once I sorted out my probs, its flying pretty good with setup similar to VC has.
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« Reply #11 on: August 26, 2012, 12:28:30 PM »
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OK dumb question # 1:

The Quad is set up in X configuration, if I want to change it to a + config, do I have to remove the controller board and place it properly again?
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« Reply #12 on: August 26, 2012, 12:30:52 PM »
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Yes. The pointing arrows should point to the direction specified for the configuration as far as I know.
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« Reply #13 on: August 26, 2012, 12:47:49 PM »
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VC sir congratulations. I loved it. CD cover idea is really nice, helps protecting board and receiver.
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« Reply #14 on: August 26, 2012, 12:59:36 PM »
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@hyd_quads

Yeah Sorry I forgot to mention that... SS series...  Bang Head

Btw I myself am using Hobbyking ESC's but they are blueseries 30 Amps....

Thanks for correction...!!

 Salute
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« Reply #15 on: August 26, 2012, 01:02:33 PM »
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There are NO blessed arrows on this board. The CD cover idea was given by Ashta Sir.
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« Reply #16 on: August 26, 2012, 01:04:57 PM »
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Hmm... you are using KK2... sorry, my bad that I assumed its v2 or3. Please ignore my dumb answer to your not so dumb question.

Edit: As per http://www.hobbyking.com/hobbyking/store/uploads/181270330X7478X47.pdf , its says,

"Initial Setup:
-Mount the FC on the frame with the LCD facing front and the buttons facing back."
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« Reply #17 on: August 26, 2012, 01:10:55 PM »
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That's it. It is back to the drawing board. There is just too much flex in the arms and that is causing the Quad to behave erratically after a while. I need to strengthen that.
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« Reply #18 on: August 26, 2012, 01:13:28 PM »
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I think arrow is marked at the backside of KK2.0(don't know actually) but gyro chips side is front and button side is back for sure.
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« Reply #19 on: August 26, 2012, 01:16:02 PM »
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Dharmik / Sam, that much has been done -

Dumb Question # 2 - How precise does this placement have to be? Will a few mm off here and there cause the Quad to fly out of whack?

Dumb Question # 3 - What happens if I turn off the Auto Level function?
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« Reply #20 on: August 26, 2012, 01:22:29 PM »
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DA to DQ#2 : I have faced severe yaw problem with it. Once properly centered, was good
DA to DQ#3 : Dharmik, hyd_quads, someone please help!
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« Reply #21 on: August 26, 2012, 01:27:01 PM »
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Thanks Sam. Every time that I'm in trouble you are there to try and find a solution. I owe you Boss.

I might as well take it apart and rebuild it on a proper plywood frame. I rushed this and built it within 2 days. Wasn't sure whether it would fly at all. Now that it does, valuable lessons have been learnt and I will be much more accurate on the new build. Starting right away.
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« Reply #22 on: August 26, 2012, 01:30:49 PM »
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Will wait for the ver.2 then Cheesy . Good luck with it!
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« Reply #23 on: August 26, 2012, 01:44:20 PM »
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Sir this KK2.0 boards are really sensitive. You have to place it at the center exactly.  HK boards(v1, v2.1 and v3.0) are forgiving in this case. Mine was bit 2-3mm off on yaw axis and it was giving me strange yaw drift issue. If you have stock firmware there's no use of auto-level. It's really worst. So disable it. In latest v1.2 fw KK has fixed this to some level.
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« Reply #24 on: August 26, 2012, 01:45:44 PM »
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Thanks Dharmik. Wish me luck.
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« Reply #25 on: August 26, 2012, 04:16:43 PM »
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Done! Frame reinforced with 2 layers of coro. Perfect take off and hover!
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« Reply #26 on: August 26, 2012, 04:32:57 PM »
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Wonderful!  Clap that was real quick  Salute Video please  Drool
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« Reply #27 on: August 26, 2012, 05:24:19 PM »
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congratulation dada.very beautiful quad u make.really nice.pls upload video too
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« Reply #28 on: August 26, 2012, 09:30:40 PM »
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Here are a few pics of the modified airframe and landing pads. Flex reduced substantially hence flights are more stable. I was too nervous to try to fly and shoot a video at the same time. Need one of Ashta Sir's hat cams. My assistant, Indrakshi Chaudhury, was also absconding today.

She has a very stable hover when I do a hand launch at about 7 feet height. Need to work more on my ground take offs. Hope to upload a convincing video by tomorrow.

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Re: The Ugly Quad!
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« Reply #29 on: August 26, 2012, 09:35:43 PM »
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My Mother was kind enough to sew me a couple of velcro battery straps. They are awesome. I wonder how I was doing without these for so long. The buckles are made out of bent copper rods 1.5mm.

I have always been very wary about charging a LiPo that is attached to a model with zip ties. In case something goes wrong with the battery, the model itself is doomed.

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« Reply #30 on: August 26, 2012, 09:41:16 PM »
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Please request your assistant to take a vid and let us all admire your quad's stability!
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« Reply #31 on: August 26, 2012, 10:15:23 PM »
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VC sir i am also using C type channels but yours look too thin. My first set of aluminium channels was really weak. They were just 1mm thick. Later i bought another set they have same thickness but they are reinforced with something that can't be bent easily.
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« Reply #32 on: August 26, 2012, 11:07:39 PM »
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Dharmik you are absolutely right, that is why I reinforced them with a double layer of coro. My next Quad will be stronger. Much stronger.
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« Reply #33 on: August 26, 2012, 11:28:42 PM »
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Great build there VC.  Thumbs Up

waiting eagerly for the video
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« Reply #34 on: August 26, 2012, 11:32:18 PM »
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Jaago, Sandy Bhai, Jaago! Thanks.
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« Reply #35 on: August 27, 2012, 06:46:18 AM »
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great build VC, undercarriage looks good. yesterday flew my quad in the valley too much winds and my 3D settings couldn't handle that well
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« Reply #36 on: August 27, 2012, 07:37:26 AM »
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Video please! and whats the AUW VC? mine came around 760g with a 2.2 3cell.
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« Reply #37 on: August 27, 2012, 08:44:19 AM »
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VC sir, source of aluminium square channels is here, price is great like local stores.
http://www.aeroworks.co.in/frames.html
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