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New Tricopter Build

Started by Ashta, October 29, 2010, 11:48:10 AM

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Ashta

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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Ashta

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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Ashta

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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Ashta

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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Ashta

some more photos.

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prateek13

PHATA POSTER NIKLA HERO! ;D
best of luck!
Award | OFNA Nexx8 | Art-Tech Edge 540T | Glidiator V2 | Hawker Tempest | Cessna Citation Jet
Turnigy 9X
FPV Platforms : CF Tricopter| HK EPP FPV | Bixler 1 | Bixler 2 | DJI Phantom 2 +H3 3D

izmile

Wow! very interesting build. All the best for the testing. I am sure it would fly as you expect.

-Ismail
"Anything can fly" - SPADs just prove that!

sundaram

Ashta Ji very interesting thread fabulous.  {:)}  {:)}  {:)}  

I am following this intently. Eagerly awaiting more details on servos setup and mixing, gyros setup, throttle mixing and reference details.

anwar

#8
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 :)
Hangar : Please see my introduction.
RC India forum and me : About this forum.

sandeepm

Nice  {:)} {:)}
Awaiting first run Videos.......
Fly high if you have good set of batteries.....!

Ashta

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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ashJR7202

oh!!!!!! u did it again!!!!
this was my dream project!!!!!

would love to see ur more comments, experience building it!!!
Hanger: Mini Yak-54| 210 Phantom | SU-47| F-15| EuroFighter|Scrappy|SU 27|Eurofighter|Sukhoi PAK FA
Blade MCX| Blade CP PRO
JR XP7202| DX7

SunLikeStar

that machine looks huge for a tricopter. cant wait to see it fly. subscribed.

praveen

another masterpiece from magic hands !  :bow:
waiting for video  :)
good luck sir :thumbsup:
To increase thrust you need more  money! But to reduce weight you  need nothing!

Ashta

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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medicineman1987

Best of luck with your tri-copter Ashta sir.. Looks really good.. Hopefully i'll build a similar one some day :)
"The day you stop playing with your toys is the day you start getting ready to die.."

FlySky 9x (with ER9x,  backlight mod &  dual module hack) | Futaba SkySport 4VF (with 5th channel hack) | Glidiator - scratchbuilt 60" electric glider | SkySurfer | Scratchbuilt Tricopter | FT Nutball |  .46 Glow trainer (electric conversion in progress)

Ashta

Thank you all for the wishes. i am o/s for few days will be back after 3-4 days.
You can't be first because you do not know!

prateek13

Award | OFNA Nexx8 | Art-Tech Edge 540T | Glidiator V2 | Hawker Tempest | Cessna Citation Jet
Turnigy 9X
FPV Platforms : CF Tricopter| HK EPP FPV | Bixler 1 | Bixler 2 | DJI Phantom 2 +H3 3D

VC

Growing old is mandatory, growing up is optional!

rohitgupta322

Be Inquisitive

Ashta

Quote from: VC on November 06, 2010, 11:29:12 PM
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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Ashta

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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rajathv8

The 18-20A esc comes with connectors or only wire?

anam_funny

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...

Ashta

thanks already done.
pl find the link
http://sergio.salvi.ca/2009/10/18/mystery-gyro-g401b-modifications/?src=hk



Quote from: anam_funny on November 12, 2010, 11:08:17 AM
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...
You can't be first because you do not know!