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« on: October 29, 2010, 11:48:10 AM »
Ashta
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Hello,
I was getting bit bored making planes. So decided to try a Tri/ Quad raptor as a DIY project. So last one or two months i dedicated lot of my time reading. RCGroups multi rotor section and Aerial photography section was very usefull and informative.

Started collecting parts parallely. The first was to get some nice booms. Went to a guy selling old packing materials, got some nice Pine wood and took it to a mill and got it cut.

After reading a lot and exchanging info i was debating in my mind whether to go for a KK muticopter or a signguy type. Settled on Signguy type to start with.

Then got 1.5 mm FRC sheet for the frame.

pl see the photos

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New Tricopter Build
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« Reply #1 on: October 29, 2010, 11:51:12 AM »
Ashta
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The Yaw mechanism.
Was thinking about how to do it for a long time. Finally settled for a old CDROM Lazer carrige modified suitably.

pl find the photos.


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« Reply #2 on: October 29, 2010, 11:55:24 AM »
Ashta
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Ordered all the parts from Hobbycity.
4x #TR2410-9/6549 TURNIGY Bell TR2410-9 840kv Outrunner variations
4x #HK-SS18A/6456 Hobbyking SS Series 15-18A ESC variations
4x #GWPRR003S3D/5250 GWS HD9050 3 Blade Prop Counter Rotate (2pc) variations
4x #GWPRO003S3D/5248 GWS HD9050 3 Blade Prop (2pc pack) variations
3x #AM1001A/68 PolyMax 3.5mm Gold Connectors 10 PAIRS (20PC) variations
1x #X8R6-S/7900 X8 R6 6Ch 2.4GHz Receiver (Short Antenna) variations
2x #R1350-30-3/7658 Rhino 1350mAh 3S1P 30C Lipoly Pack variations
4x #HK401B/10113 Hobby King 401B AVCS Digital Head Lock Gyro  variations

while waiting for the parts, continued my reading and also tried completing the frames.

and finally the parts arrived.



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« Reply #3 on: October 29, 2010, 11:59:00 AM »
Ashta
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Assembly of the tricopter.
This took nearly 3- 4 evenings.
 It is now ready for powering on and testing.
I have no prior experience in Heli flying.
Hope that i will manage.
This is still not powered on. Will do it in couple of days.
pl see some more photos
thanking you..

Ashta

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« Reply #4 on: October 29, 2010, 12:00:21 PM »
Ashta
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some more photos.


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« Reply #5 on: October 29, 2010, 12:15:05 PM »
prateek13
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PHATA POSTER NIKLA HERO! Grin
best of luck!
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« Reply #6 on: October 29, 2010, 12:18:10 PM »
izmile
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Wow! very interesting build. All the best for the testing. I am sure it would fly as you expect.

-Ismail
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« Reply #7 on: October 29, 2010, 12:22:44 PM »
sundaram
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Ashta Ji very interesting thread fabulous.  Clap  Clap  Clap  

I am following this intently. Eagerly awaiting more details on servos setup and mixing, gyros setup, throttle mixing and reference details.
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« Reply #8 on: October 29, 2010, 01:01:36 PM »
anwar
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Be very cautious at the first attempt to lift off, I would recommend doing it on a forgiving surface (grass).

The gyro compensation direction needs to be set... plus the gains and channel end points often (if not always) need to be tweaked in this design.  And remember that once powered on, the motors can turn just by gyro inputs alone (even at zero throttle), so please do keep your hands away from the props !

And you have to set it up as a heli model with 3 swash servo setting.

Awaiting the videos Smiley
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« Reply #9 on: October 29, 2010, 01:40:33 PM »
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Nice  Clap Clap
Awaiting first run Videos.......
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« Reply #10 on: October 29, 2010, 03:11:38 PM »
Ashta
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thanks all. I will surely post the videos. But next few days i am O/S and hence it will be after 4-5 days.
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« Reply #11 on: October 29, 2010, 03:28:04 PM »
ashJR7202
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oh!!!!!! u did it again!!!!
this was my dream project!!!!!

would love to see ur more comments, experience building it!!!
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« Reply #12 on: October 29, 2010, 03:51:07 PM »
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that machine looks huge for a tricopter. cant wait to see it fly. subscribed.
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« Reply #13 on: October 29, 2010, 05:43:58 PM »
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another masterpiece from magic hands !  Bow
waiting for video  Smiley
good luck sir Thumbs Up
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« Reply #14 on: October 30, 2010, 12:50:05 PM »
Ashta
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As anwar said it is extremely dangerous to test the Tricopter fully armed with Props. It is better to test it step by step.
Step1: Test CCPM 120 Degress mixing, working correctly
Step2: Check all Gyros working correctly.
Step3: Motor Bell balancing
Step4: Propeller balancing
Step5: Try flying and adjust the Gyro gain.

From step1 to step3, We can test it by replacing the motors with Servos. Detailed procedures can be found at:
http://www.rcexplorer.se/page14/triguide/triguide.html
Here is a video of step1.


thanks


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« Reply #15 on: October 30, 2010, 01:20:00 PM »
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Best of luck with your tri-copter Ashta sir.. Looks really good.. Hopefully i'll build a similar one some day Smiley
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« Reply #16 on: October 30, 2010, 01:30:58 PM »
Ashta
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Thank you all for the wishes. i am o/s for few days will be back after 3-4 days.
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« Reply #17 on: November 06, 2010, 11:20:16 PM »
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any updates?
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« Reply #18 on: November 06, 2010, 11:29:12 PM »
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Ashta Sir Bow Bow Bow
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« Reply #19 on: November 07, 2010, 08:05:27 AM »
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Brilliant Ashta sir. Salute
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« Reply #20 on: November 10, 2010, 12:02:59 PM »
Ashta
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Ashta Sir Bow Bow Bow
Thanks VC and Rohit,
i was out of station till today. will try to do some work this week. again whole next week i am away. sorry, to keep you waiting..
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« Reply #21 on: November 11, 2010, 09:26:02 PM »
Ashta
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There are many fine tunings to be done and ensured before flying the Tricopter, namely,
1. The swash mixing ratio
2. The gain for Motor Gyros
3. Gain for the Yaw Srvo
4.The Throws and Exponential.
5. Balancing of Motors.
6. Balancing of Props.
7. Last but not least " Learning to fly"

here is the video of my tricopter test set up, where i have hung the tricopter on a string and fine tuning. If luck is on my side, i will post a string free video in a weeks time.

thanks for watching


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« Reply #22 on: November 11, 2010, 09:58:15 PM »
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The 18-20A esc comes with connectors or only wire?
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« Reply #23 on: November 12, 2010, 11:08:17 AM »
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Please do the modificatiuon in the gyros... that is very important... after 2-3 flights... the gyros will start loosing their precision... YOU NEED TO MODIFY THE GYROS...
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« Reply #24 on: November 12, 2010, 11:41:38 AM »
Ashta
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thanks already done.
pl find the link
http://sergio.salvi.ca/2009/10/18/mystery-gyro-g401b-modifications/?src=hk



Please do the modificatiuon in the gyros... that is very important... after 2-3 flights... the gyros will start loosing their precision... YOU NEED TO MODIFY THE GYROS...
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